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Please refer to the Repository Structure section for a complete list of file paths, including binary files - Only files matching these patterns are included: **/*.md, **/*.mdx - Files matching patterns in .gitignore are excluded - Files matching default ignore patterns are excluded - Files are sorted by Git change count (files with more changes are at the bottom) docs/ advanced/ ai-context.mdx math-utils.mdx simple-route-json.mdx units.md building-electronics/ designing-electronics-from-scratch.md ordering-prototypes.mdx what-are-electronics-made-of.mdx command-line/ tsci-add.mdx tsci-auth-print-token.md tsci-build.md tsci-dev.md tsci-export.md tsci-init.md tsci-login.md tsci-push.md tsci-search.md tsci-snapshot.md contributing/ bounties-and-sponsorship.md getting-started-as-a-contributor.md overview-of-projects.md report-autorouter-bugs.md the-contributor-handbook.md elements/ battery.mdx board.mdx breakout.mdx breakoutpoint.mdx capacitor.mdx chip.mdx crystal.mdx diode.mdx footprint.mdx fuse.mdx group.mdx hole.mdx inductor.mdx jumper.mdx led.mdx mosfet.mdx net.mdx netlabel.mdx pinheader.mdx potentiometer.mdx pushbutton.mdx resistor.mdx resonator.mdx schematictext.mdx solderjumper.mdx subcircuit.mdx switch.mdx testpoint.mdx trace.mdx transistor.mdx via.mdx footprints/ constraint.mdx fabricationnotetext.mdx footprint-elements-vs-footprint-strings.mdx footprinter-strings.mdx kicad-footprints.mdx platedhole.mdx silkscreencircle.mdx silkscreenline.mdx silkscreenpath.mdx silkscreenrect.mdx silkscreentext.mdx smtpad.mdx guides/ importing-modules-and-chips/ importing-from-circuit-json.mdx importing-from-jlcpcb.mdx importing-from-kicad.md running-tscircuit/ connecting-to-github.mdx displaying-circuit-json-on-a-webpage.mdx platform-configuration.md programmatically-building-circuits.md running-tscircuit-inside-an-iframe.mdx running-tscircuit-standalone.mdx using-tscircuit-without-react.mdx tscircuit-essentials/ automatic-pcb-layout.mdx automatic-schematic-layout.mdx configuring-chips.mdx essential-elements.mdx layout-properties.mdx manual-edits.mdx port-and-net-selectors.md using-expressions.mdx using-sel-references.mdx understanding-fabrication-files.md intro/ installation.md quickstart-ChatGPT.mdx quickstart-cli.md quickstart-web.md what-is-tscircuit.mdx tutorials/ build-a-custom-keyboard-with-tscircuit.mdx building-a-simple-usb-flashlight.mdx building-led-matrix.mdx web-apis/ autorouting-api.mdx compile-api.md datasheet-api.md datasheet-sdk.md image-generation-api.mdx jlcsearch-api.md ordering-api.mdx the-registry-api.md CLAUDE.md README.md This section contains the contents of the repository's files. --- title: AI Context description: Learn how to use our AI context to help you design with tscircuit --- import YouTubeEmbed from '../../src/components/YouTubeEmbed'; ## Overview You can drop our AI context into your Claude or OpenAI project by downloading the [`ai.txt`](https://docs.tscircuit.com/ai.txt) file and dropping it into your project. This will teach Claude and OpenAI about tscircuit so it can help you design boards or access tricky or hidden pieces of the documentation! You can also use [chat.tscircuit.com](https://chat.tscircuit.com) for a prebuilt version of the AI. It contains live preview for a great development experience. --- title: Simple Route JSON description: >- Simple Route JSON (SRJ) is a lightweight, straightforward format designed to describe a Printed Circuit Board (PCB) routing problem. It serves as a common intermediary representation used by `tscircuit` autorouters, simplifying the complex details often found in full PCB design files. --- ## Overview Simple Route JSON (SRJ) is a lightweight, straightforward format designed to describe a Printed Circuit Board (PCB) routing problem. It serves as a common intermediary representation used by [`tscircuit` autorouters](https://github.com/tscircuit/unravel-autorouter), simplifying the complex details often found in full PCB design files. The primary goal of SRJ is to provide only the essential information required for a routing algorithm: 1. Where routing is allowed (layers, board boundaries). 2. Where routing is forbidden (obstacles, keep-out areas). 3. What needs to be connected (nets and their associated pins/pads). 4. Basic routing constraints (minimum trace width). SRJ can be directly generated from more comprehensive formats like [Circuit JSON](https://circuitjson.com), stripping away details irrelevant to the core routing task (e.g., specific component models, schematic information beyond connectivity). It shares conceptual similarities with the industry-standard [Specctra DSN (Design)](https://github.com/tscircuit/dsn-converter) format, but aims for greater simplicity and modern JSON representation. :::info A formal specification with versioning is planned for the future. To stay updated on its release and other tscircuit developments, please subscribe to [the tscircuit newsletter](https://blog.tscircuit.com/). ::: ## Format Structure A Simple Route JSON file is a single JSON object containing the definition of the board layout, obstacles, and connections needed for routing. ```typescript export interface SimpleRouteJson { /** The total number of conductive layers on the PCB. */ layerCount: number; /** The default or minimum width for traces. Specific trace segments might override this if the format evolves, but currently used as a general guideline. Units are implicit (e.g., mm, inches) and must be consistent throughout the file. */ minTraceWidth: number; /** An array of obstacles on the board, such as component pads, mounting holes, or keep-out areas. */ obstacles: Obstacle[]; /** An array defining the electrical connections (nets) that need to be routed. */ connections: Array; /** The bounding box defining the extents of the routing area. */ bounds: { minX: number; maxX: number; minY: number; maxY: number }; /** [Optional] The routing solution provided by an autorouter. This array contains the actual paths of the traces. It is typically absent in the input file given to a router and present in the output file. */ traces?: SimplifiedPcbTrace[]; } ``` ## Top-Level Properties ### `layerCount` * **Type:** `number` * **Description:** An integer specifying the total number of conductive layers available for routing on the PCB. Layers are typically identified by string names (e.g., `"top"`, `"inner1"`, `"bottom"`) within other parts of the format (like `obstacles` and `connections`). While `layerCount` provides the total number, the specific layer names used must be consistent throughout the file. ### `minTraceWidth` * **Type:** `number` * **Description:** Specifies the default or minimum trace width to be used by the autorouter. This acts as a global constraint. Future versions or specific router implementations might allow per-net or per-segment width rules, but this provides a baseline. * **Units:** Units (e.g., millimeters, inches) are not explicitly defined by the format. It is crucial that the same unit system is used consistently for all dimensional values (`minTraceWidth`, `obstacles`, `bounds`, coordinates) within a single SRJ file. Millimeters (mm) are commonly used. ### `obstacles` * **Type:** `Array` * **Description:** An array containing objects that represent areas on the PCB where routing is either restricted or represents a connection point. Obstacles can be physical component pads, mounting holes, board edges defined as keep-outs, or explicit keep-out zones. ```typescript export type Obstacle = { /** The shape of the obstacle. Currently, only "rect" is standard. Oval shapes might be included in future revisions. */ type: "rect"; // NOTE: most datasets do not contain ovals /** An array of layer names (strings) on which this obstacle exists. An obstacle can span multiple layers (e.g., a plated through-hole pad). */ layers: string[]; /** The center coordinates of the obstacle. */ center: { x: number; y: number }; /** The width of the rectangular obstacle. */ width: number; /** The height of the rectangular obstacle. */ height: number; /** An array of connection names (strings) that this obstacle is part of. If this obstacle is a pad for a net (e.g., "GND", "VCC"), the net name(s) will be listed here. If the array is empty, the obstacle is typically a keep-out area or an unconnected feature. */ connectedTo: string[]; }; ``` * **`type`**: Defines the geometry. Currently `"rect"` is the standard. * **`layers`**: Specifies which layer(s) the obstacle occupies. Important for multi-layer routing. * **`center`, `width`, `height`**: Define the geometry and position of the rectangle. Units must be consistent with `minTraceWidth` and `bounds`. * **`connectedTo`**: This critical field links obstacles (like pads) to the electrical nets defined in the `connections` array. If an obstacle represents a pin for the "VCC" net, `connectedTo` would contain `["VCC"]`. ### `connections` * **Type:** `Array` * **Description:** Defines the sets of points that need to be electrically connected. Each object in the array represents a single net (e.g., power, ground, signal). ```typescript export interface SimpleRouteConnection { /** The unique name of the connection or net (e.g., "GND", "VCC", "DATA0"). This name is referenced by Obstacle.connectedTo. */ name: string; /** An array of points that must be connected together to form this net. Each point typically corresponds to the center of an obstacle (pad) belonging to this net. */ pointsToConnect: Array<{ /** The x-coordinate of the connection point. */ x: number; /** The y-coordinate of the connection point. */ y: number; /** The layer name (string) on which this connection point resides. */ layer: string; }>; } ``` * **`name`**: A unique string identifier for the net. This is used to link `Obstacle` objects (pads) to their respective nets. * **`pointsToConnect`**: An array listing the specific locations (`x`, `y`, `layer`) that the router must connect. These points usually align with the `center` coordinates and `layers` of the corresponding `Obstacle` objects linked via the `name`. ### `bounds` * **Type:** `object` * **Description:** Defines the rectangular boundary of the area where routing is permitted. Traces should generally not extend beyond these limits. * **Structure:** * `minX`: The minimum x-coordinate of the routing area. * `maxX`: The maximum x-coordinate of the routing area. * `minY`: The minimum y-coordinate of the routing area. * `maxY`: The maximum y-coordinate of the routing area. * **Units:** Must be consistent with other dimensional values in the file. ### `traces` (Optional) * **Type:** `Array` * **Description:** This array represents the output of an autorouter – the actual geometric paths (traces and vias) that implement the required connections. It is typically **not present** in the input SRJ file given to the router. * **Presence:** Included in the SRJ file *after* routing has been successfully completed. ```typescript export type SimplifiedPcbTrace = { /** Identifier indicating the object type. Always "pcb_trace". */ type: "pcb_trace"; /** A unique identifier for this specific trace path. */ pcb_trace_id: string; /** [Optional] The name of the connection/net this trace belongs to. Links the solved route back to the SimpleRouteConnection definition. */ connection_name?: string; /** An array defining the geometry of the trace path, composed of wire segments and vias. */ route: Array< | { /** Indicates a straight wire segment on a single layer. */ route_type: "wire"; /** The x-coordinate of the *end* point of the wire segment. */ x: number; /** The y-coordinate of the *end* point of the wire segment. */ y: number; /** The width of this wire segment. */ width: number; /** The layer name (string) this wire segment is on. */ layer: string; } | { /** Indicates a via connecting two layers. */ route_type: "via"; /** The x-coordinate of the via's center. */ x: number; /** The y-coordinate of the via's center. */ y: number; /** The layer name (string) the via transitions *to*. */ to_layer: string; /** The layer name (string) the via transitions *from*. */ from_layer: string; } >; }; ``` * **`type`**: Always `"pcb_trace"`. * **`pcb_trace_id`**: Unique ID for the trace. * **`connection_name`**: Links trace to the net name from `connections`. * **`route`**: An ordered array describing the path: * **`wire`**: Represents a straight segment of copper trace. The segment runs from the end point of the previous element in the `route` array (or an initial connection point) to the specified `(x, y)` coordinate on the given `layer` with the specified `width`. * **`via`**: Represents a vertical connection between layers at `(x, y)`, transitioning from `from_layer` to `to_layer`. Note that physical via characteristics (drill size, annular ring) are not detailed in this simplified format. ## Example ```json { "layerCount": 2, "minTraceWidth": 0.15, "obstacles": [ { "type": "rect", "layers": ["top"], "center": { "x": 10, "y": 10 }, "width": 1.2, "height": 1.2, "connectedTo": ["VCC"] }, { "type": "rect", "layers": ["top"], "center": { "x": 30, "y": 10 }, "width": 1.2, "height": 1.2, "connectedTo": ["VCC"] }, { "type": "rect", "layers": ["bottom"], "center": { "x": 20, "y": 25 }, "width": 1.2, "height": 1.2, "connectedTo": ["GND"] }, { "type": "rect", "layers": ["bottom"], "center": { "x": 40, "y": 25 }, "width": 1.2, "height": 1.2, "connectedTo": ["GND"] }, { "type": "rect", "layers": ["top", "bottom"], // Keepout on both layers "center": { "x": 25, "y": 15 }, "width": 5, "height": 3, "connectedTo": [] // Empty means it's a keepout } ], "connections": [ { "name": "VCC", "pointsToConnect": [ { "x": 10, "y": 10, "layer": "top" }, { "x": 30, "y": 10, "layer": "top" } ] }, { "name": "GND", "pointsToConnect": [ { "x": 20, "y": 25, "layer": "bottom" }, { "x": 40, "y": 25, "layer": "bottom" } ] } ], "bounds": { "minX": 0, "maxX": 50, "minY": 0, "maxY": 40 }, // --- TRACES SECTION (added by router) --- "traces": [ { "type": "pcb_trace", "pcb_trace_id": "trace_vcc_1", "connection_name": "VCC", "route": [ { "route_type": "wire", "x": 10, "y": 10, "width": 0.15, "layer": "top" }, // Start implicitly at first point { "route_type": "wire", "x": 20, "y": 5, "width": 0.15, "layer": "top" }, { "route_type": "wire", "x": 30, "y": 10, "width": 0.15, "layer": "top" } // End at second point ] }, { "type": "pcb_trace", "pcb_trace_id": "trace_gnd_1", "connection_name": "GND", "route": [ { "route_type": "wire", "x": 20, "y": 25, "width": 0.15, "layer": "bottom" }, // Start implicitly at first point // Example with a via { "route_type": "wire", "x": 30, "y": 25, "width": 0.15, "layer": "bottom" }, { "route_type": "via", "x": 30, "y": 25, "from_layer": "bottom", "to_layer": "top" }, { "route_type": "wire", "x": 30, "y": 20, "width": 0.15, "layer": "top" }, // Segment on top layer { "route_type": "via", "x": 30, "y": 20, "from_layer": "top", "to_layer": "bottom" }, { "route_type": "wire", "x": 40, "y": 25, "width": 0.15, "layer": "bottom" } // End at second point ] } ] } ``` ## Units and Coordinate System The Simple Route JSON format does **not** enforce specific units (e.g., mm, mil, inches) or a coordinate system origin (e.g., top-left, bottom-left). * **Consistency is Key:** All dimensional values (`minTraceWidth`, obstacle `width`/`height`, `bounds`, all `x`/`y` coordinates in `obstacles`, `connections`, and `traces`) within a single SRJ file **must** use the same units. * **Common Practice:** Millimeters (mm) are frequently used. * **Origin:** The coordinate system origin is typically assumed to be top-left or bottom-left, with X increasing to the right and Y increasing downwards (top-left) or upwards (bottom-left). Consistency within the file and between the SRJ generator and consumer (the autorouter) is essential. ## Relationship to Other Formats * **Circuit JSON:** Simple Route JSON is a simplified derivative of Circuit JSON. Tools can convert Circuit JSON to SRJ by extracting layer stackup information, component pad locations and net assignments, board outlines, and any defined keep-out areas. Information not relevant to routing (e.g., schematic IDs, component values, 3D models) is omitted. * **Specctra DSN:** SRJ serves a similar purpose to DSN files – describing a routing problem. However, SRJ uses a modern JSON structure, which is often easier to parse and generate in web-based and JavaScript/TypeScript environments compared to the text-based, keyword-driven DSN format. The `dsn-converter` tool ([link](https://github.com/tscircuit/dsn-converter)) can facilitate conversion between DSN and SRJ or similar formats. ## Usage The primary use case for Simple Route JSON is as the input and output format for `tscircuit` autorouting tools. 1. **Input:** A PCB design tool or conversion script generates an SRJ file describing the board, obstacles, and connections. This file is fed into an autorouter. 2. **Output:** The autorouter processes the input SRJ, computes the trace paths, and outputs a new SRJ file that includes the original data plus the `traces` array detailing the solution. 3. **Post-processing:** The output SRJ (with traces) can then be converted back into a format compatible with PCB design software (like Circuit JSON, KiCad, Eagle, etc.) to integrate the routing solution into the full PCB design. ``````markdown --- title: Simple Route JSON --- ## Overview Simple Route JSON (SRJ) is a lightweight, straightforward format designed to describe a Printed Circuit Board (PCB) routing problem. It serves as a common intermediary representation used by `tscircuit` autorouters, simplifying the complex details often found in full PCB design files. The primary goal of SRJ is to provide only the essential information required for a routing algorithm: 1. Where routing is allowed (layers, board boundaries). 2. Where routing is forbidden (obstacles, keep-out areas). 3. What needs to be connected (nets and their associated pins/pads). 4. Basic routing constraints (minimum trace width). SRJ can be directly generated from more comprehensive formats like [Circuit JSON](https://circuitjson.com), stripping away details irrelevant to the core routing task (e.g., specific component models, schematic information beyond connectivity). It shares conceptual similarities with the industry-standard [Specctra DSN (Design)](https://github.com/tscircuit/dsn-converter) format, but aims for greater simplicity and modern JSON representation. :::info A formal specification with versioning is planned for the future. To stay updated on its release and other tscircuit developments, please subscribe to [the tscircuit newsletter](https://blog.tscircuit.com/). ::: ## Format Structure A Simple Route JSON file is a single JSON object containing the definition of the board layout, obstacles, and connections needed for routing. ```typescript export interface SimpleRouteJson { /** The total number of conductive layers on the PCB. */ layerCount: number; /** The default or minimum width for traces. Specific trace segments might override this if the format evolves, but currently used as a general guideline. Units are implicit (e.g., mm, inches) and must be consistent throughout the file. */ minTraceWidth: number; /** An array of obstacles on the board, such as component pads, mounting holes, or keep-out areas. */ obstacles: Obstacle[]; /** An array defining the electrical connections (nets) that need to be routed. */ connections: Array; /** The bounding box defining the extents of the routing area. */ bounds: { minX: number; maxX: number; minY: number; maxY: number }; /** [Optional] The routing solution provided by an autorouter. This array contains the actual paths of the traces. It is typically absent in the input file given to a router and present in the output file. */ traces?: SimplifiedPcbTrace[]; } ``` ## Top-Level Properties ### `layerCount` * **Type:** `number` * **Description:** An integer specifying the total number of conductive layers available for routing on the PCB. Layers are typically identified by string names (e.g., `"top"`, `"inner1"`, `"bottom"`) within other parts of the format (like `obstacles` and `connections`). While `layerCount` provides the total number, the specific layer names used must be consistent throughout the file. ### `minTraceWidth` * **Type:** `number` * **Description:** Specifies the default or minimum trace width to be used by the autorouter. This acts as a global constraint. Future versions or specific router implementations might allow per-net or per-segment width rules, but this provides a baseline. * **Units:** Units (e.g., millimeters, inches) are not explicitly defined by the format. It is crucial that the same unit system is used consistently for all dimensional values (`minTraceWidth`, `obstacles`, `bounds`, coordinates) within a single SRJ file. Millimeters (mm) are commonly used. ### `obstacles` * **Type:** `Array` * **Description:** An array containing objects that represent areas on the PCB where routing is either restricted or represents a connection point. Obstacles can be physical component pads, mounting holes, board edges defined as keep-outs, or explicit keep-out zones. ```typescript export type Obstacle = { /** The shape of the obstacle. Currently, only "rect" is standard. Oval shapes might be included in future revisions. */ type: "rect"; // NOTE: most datasets do not contain ovals /** An array of layer names (strings) on which this obstacle exists. An obstacle can span multiple layers (e.g., a plated through-hole pad). */ layers: string[]; /** The center coordinates of the obstacle. */ center: { x: number; y: number }; /** The width of the rectangular obstacle. */ width: number; /** The height of the rectangular obstacle. */ height: number; /** An array of connection names (strings) that this obstacle is part of. If this obstacle is a pad for a net (e.g., "GND", "VCC"), the net name(s) will be listed here. If the array is empty, the obstacle is typically a keep-out area or an unconnected feature. */ connectedTo: string[]; }; ``` * **`type`**: Defines the geometry. Currently `"rect"` is the standard. * **`layers`**: Specifies which layer(s) the obstacle occupies. Important for multi-layer routing. * **`center`, `width`, `height`**: Define the geometry and position of the rectangle. Units must be consistent with `minTraceWidth` and `bounds`. * **`connectedTo`**: This critical field links obstacles (like pads) to the electrical nets defined in the `connections` array. If an obstacle represents a pin for the "VCC" net, `connectedTo` would contain `["VCC"]`. ### `connections` * **Type:** `Array` * **Description:** Defines the sets of points that need to be electrically connected. Each object in the array represents a single net (e.g., power, ground, signal). ```typescript export interface SimpleRouteConnection { /** The unique name of the connection or net (e.g., "GND", "VCC", "DATA0"). This name is referenced by Obstacle.connectedTo. */ name: string; /** An array of points that must be connected together to form this net. Each point typically corresponds to the center of an obstacle (pad) belonging to this net. */ pointsToConnect: Array<{ /** The x-coordinate of the connection point. */ x: number; /** The y-coordinate of the connection point. */ y: number; /** The layer name (string) on which this connection point resides. */ layer: string; }>; } ``` * **`name`**: A unique string identifier for the net. This is used to link `Obstacle` objects (pads) to their respective nets. * **`pointsToConnect`**: An array listing the specific locations (`x`, `y`, `layer`) that the router must connect. These points usually align with the `center` coordinates and `layers` of the corresponding `Obstacle` objects linked via the `name`. ### `bounds` * **Type:** `object` * **Description:** Defines the rectangular boundary of the area where routing is permitted. Traces should generally not extend beyond these limits. * **Structure:** * `minX`: The minimum x-coordinate of the routing area. * `maxX`: The maximum x-coordinate of the routing area. * `minY`: The minimum y-coordinate of the routing area. * `maxY`: The maximum y-coordinate of the routing area. * **Units:** Must be consistent with other dimensional values in the file. ### `traces` (Optional) * **Type:** `Array` * **Description:** This array represents the output of an autorouter – the actual geometric paths (traces and vias) that implement the required connections. It is typically **not present** in the input SRJ file given to the router. * **Presence:** Included in the SRJ file *after* routing has been successfully completed. ```typescript export type SimplifiedPcbTrace = { /** Identifier indicating the object type. Always "pcb_trace". */ type: "pcb_trace"; /** A unique identifier for this specific trace path. */ pcb_trace_id: string; /** [Optional] The name of the connection/net this trace belongs to. Links the solved route back to the SimpleRouteConnection definition. */ connection_name?: string; /** An array defining the geometry of the trace path, composed of wire segments and vias. */ route: Array< | { /** Indicates a straight wire segment on a single layer. */ route_type: "wire"; /** The x-coordinate of the *end* point of the wire segment. */ x: number; /** The y-coordinate of the *end* point of the wire segment. */ y: number; /** The width of this wire segment. */ width: number; /** The layer name (string) this wire segment is on. */ layer: string; } | { /** Indicates a via connecting two layers. */ route_type: "via"; /** The x-coordinate of the via's center. */ x: number; /** The y-coordinate of the via's center. */ y: number; /** The layer name (string) the via transitions *to*. */ to_layer: string; /** The layer name (string) the via transitions *from*. */ from_layer: string; } >; }; ``` * **`type`**: Always `"pcb_trace"`. * **`pcb_trace_id`**: Unique ID for the trace. * **`connection_name`**: Links trace to the net name from `connections`. * **`route`**: An ordered array describing the path: * **`wire`**: Represents a straight segment of copper trace. The segment runs from the end point of the previous element in the `route` array (or an initial connection point) to the specified `(x, y)` coordinate on the given `layer` with the specified `width`. * **`via`**: Represents a vertical connection between layers at `(x, y)`, transitioning from `from_layer` to `to_layer`. Note that physical via characteristics (drill size, annular ring) are not detailed in this simplified format. ## Example ```json { "layerCount": 2, "minTraceWidth": 0.15, "obstacles": [ { "type": "rect", "layers": ["top"], "center": { "x": 10, "y": 10 }, "width": 1.2, "height": 1.2, "connectedTo": ["VCC"] }, { "type": "rect", "layers": ["top"], "center": { "x": 30, "y": 10 }, "width": 1.2, "height": 1.2, "connectedTo": ["VCC"] }, { "type": "rect", "layers": ["bottom"], "center": { "x": 20, "y": 25 }, "width": 1.2, "height": 1.2, "connectedTo": ["GND"] }, { "type": "rect", "layers": ["bottom"], "center": { "x": 40, "y": 25 }, "width": 1.2, "height": 1.2, "connectedTo": ["GND"] }, { "type": "rect", "layers": ["top", "bottom"], // Keepout on both layers "center": { "x": 25, "y": 15 }, "width": 5, "height": 3, "connectedTo": [] // Empty means it's a keepout } ], "connections": [ { "name": "VCC", "pointsToConnect": [ { "x": 10, "y": 10, "layer": "top" }, { "x": 30, "y": 10, "layer": "top" } ] }, { "name": "GND", "pointsToConnect": [ { "x": 20, "y": 25, "layer": "bottom" }, { "x": 40, "y": 25, "layer": "bottom" } ] } ], "bounds": { "minX": 0, "maxX": 50, "minY": 0, "maxY": 40 }, // --- TRACES SECTION (added by router) --- "traces": [ { "type": "pcb_trace", "pcb_trace_id": "trace_vcc_1", "connection_name": "VCC", "route": [ { "route_type": "wire", "x": 10, "y": 10, "width": 0.15, "layer": "top" }, // Start implicitly at first point { "route_type": "wire", "x": 20, "y": 5, "width": 0.15, "layer": "top" }, { "route_type": "wire", "x": 30, "y": 10, "width": 0.15, "layer": "top" } // End at second point ] }, { "type": "pcb_trace", "pcb_trace_id": "trace_gnd_1", "connection_name": "GND", "route": [ { "route_type": "wire", "x": 20, "y": 25, "width": 0.15, "layer": "bottom" }, // Start implicitly at first point // Example with a via { "route_type": "wire", "x": 30, "y": 25, "width": 0.15, "layer": "bottom" }, { "route_type": "via", "x": 30, "y": 25, "from_layer": "bottom", "to_layer": "top" }, { "route_type": "wire", "x": 30, "y": 20, "width": 0.15, "layer": "top" }, // Segment on top layer { "route_type": "via", "x": 30, "y": 20, "from_layer": "top", "to_layer": "bottom" }, { "route_type": "wire", "x": 40, "y": 25, "width": 0.15, "layer": "bottom" } // End at second point ] } ] } ``` ## Units and Coordinate System The Simple Route JSON format does **not** enforce specific units (e.g., mm, mil, inches) or a coordinate system origin (e.g., top-left, bottom-left). * **Consistency is Key:** All dimensional values (`minTraceWidth`, obstacle `width`/`height`, `bounds`, all `x`/`y` coordinates in `obstacles`, `connections`, and `traces`) within a single SRJ file **must** use the same units. * **Common Practice:** Millimeters (mm) are frequently used. * **Origin:** The coordinate system origin is typically assumed to be top-left or bottom-left, with X increasing to the right and Y increasing downwards (top-left) or upwards (bottom-left). Consistency within the file and between the SRJ generator and consumer (the autorouter) is essential. ## Relationship to Other Formats * **Circuit JSON:** Simple Route JSON is a simplified derivative of Circuit JSON. Tools can convert Circuit JSON to SRJ by extracting layer stackup information, component pad locations and net assignments, board outlines, and any defined keep-out areas. Information not relevant to routing (e.g., schematic IDs, component values, 3D models) is omitted. * **Specctra DSN:** SRJ serves a similar purpose to DSN files – describing a routing problem. However, SRJ uses a modern JSON structure, which is often easier to parse and generate in web-based and JavaScript/TypeScript environments compared to the text-based, keyword-driven DSN format. The `dsn-converter` tool ([link](https://github.com/tscircuit/dsn-converter)) can facilitate conversion between DSN and SRJ or similar formats. ## Usage The primary use case for Simple Route JSON is as the input and output format for `tscircuit` autorouting tools. 1. **Input:** A PCB design tool or conversion script generates an SRJ file describing the board, obstacles, and connections. This file is fed into an autorouter. 2. **Output:** The autorouter processes the input SRJ, computes the trace paths, and outputs a new SRJ file that includes the original data plus the `traces` array detailing the solution. 3. **Post-processing:** The output SRJ (with traces) can then be converted back into a format compatible with PCB design software (like Circuit JSON, KiCad, Eagle, etc.) to integrate the routing solution into the full PCB design. ``` --- title: tscircuit Units --- In tscircuit you can specify a unit explicitly with a string e.g. "0.1mm", but you can also also specify numbers without units and the unit will be inferred from [platform](../guides/running-tscircuit/platform-configuration.md), [board configuration](../elements/board.mdx), [subcircuit configuration](../elements/subcircuit.mdx) or the defaults below ## Default Units By default, tscircuit uses the following base units: | Measurement Type | Base Unit | Description | | ---------------- | --------- | ------------ | | Length | mm | Millimeters | | Time | ms | Milliseconds | | Mass | g | Grams | | Angle | deg | Degrees | | Frequency | Hz | Hertz | | Volume | ml | Milliliters | | Voltage | V | Volts | | Current | A | Amperes | | Resistance | Ω | Ohms | | Capacitance | F | Farads | | Inductance | H | Henries | Base units are chosen based on the industry convention. --- title: Designing Electronics from Scratch sidebar_position: 2 description: A comprehensive guide to electronics design workflow - from requirements analysis through system diagramming, schematic capture, PCB layout, to final manufacturing --- ## Overview Typically electronics engineers go through the following steps when designing a new electronic device. 1. Requirements Analysis 2. System Diagramming 3. Schematic Capture 4. PCB Layout 5. Ordering ## Requirements Analysis This stage is all about making sure you have a clear idea of what the device should do. Your development and cost preferences are a huge factor here. 1. What should the device do? 2. How much power is needed? 3. How much processing power do I need? 4. Do I want to run linux, MicroPython, or low-level C code? Do I even need to run code? 5. How much does cost matter? 6. Should I use only parts available from turn-key manufacturers like JLCPCB? ## System Diagramming In this phase we create a diagram overview of the system and how things connect together abstractly 1. What components should I use? 2. How do things connect together at a high level? The system diagram can instantly communicate how your design works to others. ### System Diagram Example 1: Bluetooth Humidity and CO2 Sensor Here's an example of a system diagram for a simple IoT device that takes humidity and CO2 measurements and can communicate them via bluetooth.

## Schematic Capture In this phase we create a schematic diagram of the system and how things connect together. 1. Using reference designs, datasheets or pre-made modules, create all the elements of the circuit in tscircuit 2. Run design checks to make sure the circuit is hooked up correctly In this phase you should create chip modules or [import third party chips](../guides/importing-modules-and-chips/importing-from-jlcpcb.mdx) as you build up your circuit. You shouldn't be configuring chips in the same file that connects all your chips together- give each chip it's own module. After the schematics look good, you can export to a readable netlist and upload the netlist to AI tools like OpenAI O1 to get a review and make sure everything is connected properly! This is also a good stage to get your schematic reviewed by your team members. ## PCB Layout In this phase we create a layout of the circuit on a PCB. tscircuit automatically autoroutes the circuit for you, but you may still need to "drag'n'drop" components in the PCB viewer to the locations you want them to be in. Use [manual editing](../guides/tscircuit-essentials/manual-edits.mdx) to drag'n'drop components on the PCB. ## Ordering In this phase we order the PCB from a manufacturer. Typically this is done by downloading [Fabrication Files](../guides/understanding-fabrication-files.md) and "dragging and dropping" them into a manufacturer's website. Sometimes you'll want to assemble the PCB yourself (or sometimes just a single component that your manufacturer doesn't have!). In this case, you'll need a lab setup to facilitate soldering. Check out our guide on [Ordering Prototypes](./ordering-prototypes.mdx) to learn more. --- title: Ordering Prototypes sidebar_position: 4 description: After you've designed your device, you can use fabrication files to get your device fully assembled. The two most popular services for ordering prototypes are JLCPCB and PCBWay. --- ## Overview After [you've designed your device](./designing-electronics-from-scratch.md), you can use [fabrication files](../guides/understanding-fabrication-files.md) to get your device fully assembled. The two most popular services for ordering prototypes are [JLCPCB](https://jlcpcb.com) and [PCBWay](https://pcbway.com). ## Ordering Through tscircuit Platform The easiest way to order your prototypes is through the tscircuit platform, which handles the entire ordering process for you. ### Ordering Steps Here's how the ordering process works: ### 1. Get Order Quotes Navigate to the view packages page where you'll find the order button for your circuit.

The order button is present on your project's view packages page

### 2. Select Your Vendor and Quote When you click the order button, a dialog will appear showing quotes from different vendors. Currently, JLCPCB is the only available vendor, with more vendors coming soon. Compare the prices, lead times, and shipping options, then select your preferred vendor and click continue.

Compare quotes from multiple vendors and select the best option for your needs

### 3. Complete Your Order Finally, you'll be redirected to a secure Stripe checkout page where you can enter your payment details and shipping address. Your PCB will be delivered directly to your specified address.

Secure checkout with Stripe handles payment and shipping details

## Uploading [Fabrication Files](../guides/understanding-fabrication-files.md) Most fabrication or turn-key assembly services allow you to directly upload 3 types of files: - Gerbers - Bill of Materials (BOM CSV) - Pick'n'Place File (CSV) These files are all available inside your [Fabrication Files zip file](../guides/understanding-fabrication-files.md) when you export from tscircuit.

Many fabricators allow you to directly drop fabrication files on their website!

## Assembling your own boards It can sometimes be easier to assemble your own boards, this gives you more control over your inventory and can lower the cost of your prototypes since assembly services often have a minimum order quantity. Even if you're assembling your own board, you should still order your PCB from a fabrication service. PCBs require a chemical etching process to do at home and it's rarely worth the hassle to do it yourself. When you're assembling your own board, you can create a printout of your Assembly View to make it easier to place components. In an assembly view, the "pin1" location is marked with a cut corner. This can help you verify the orientation of each component as you place it.

## Controlling Part Selection Before placing your order, there are two important component properties that affect the ordering process. The `supplierPartNumbers` prop allows you to specify exact part numbers from suppliers, helping to ensure the correct components are selected during ordering. This is particularly useful for specific or critical components. ```tsx ``` ## Do Not Place Components Components with the `doNotPlace` prop set to `true` will not be included in the parts selection for ordering. This is useful for components that you plan to solder manually or that are not available through the supplier. ```tsx ``` --- title: What are electronics made of? sidebar_position: 1 description: >- In this tutorial, we're going to be talking about the different elements that make up a Printed Circuit Board (PCB). For each element, we'll show different ways that the element can be represented in tscircuit. --- ## Overview In this tutorial, we're going to be talking about the different elements that make up a Printed Circuit Board (PCB). For each element, we'll show different ways that the element can be represented in tscircuit. ## What is copper? Why are PCBs green? Copper is a conductive material that's used on a PCB to make an electrical connection between chips. A PCB is mostly made up of fiberglass with a small layer of precisely etched copper. The fiberglass is non-conductive and often coated with non-conductive green "soldermask" to cover parts of the copper that aren't meant to be connected to chips.

AI Generated PCB Image — An AI-generated PCB image. All the yellow parts represent copper, while the green parts represent fiberglass with a green soldermask

A PCB can be thought of as a bunch of "printed" copper separated by fiberglass sections that "insulate" or don't conduct electricity. We "glue" (solder) chips to the copper "pads" to add them to the circuit. ## What are PCB layers? When you print on a piece of paper, you can print "single-sided" or "double-sided", PCBs can also be printed singled-sided or double-sided! The "front" of the PCB is called the "top" layer, and the "back" of the PCB is called the "bottom" layer. We can "print" copper to each of these layers to draw lots of wires and connect lots of chips. Sometimes a wire needs to "go over"/"go under" another wire because the wires aren't allowed to cross. When this happens, we can use the "back" or "bottom layer" of the PCB to draw the wire so that the wires don't accidentally touch. ## Vias Vias are holes that connect different layers of PCB. Let's say you have a chip on the top layer of a PCB and the back layer of a PCB. How can you connect them? The copper on the top needs some way to "pass through" to the bottom layer. This is where vias come in. A via is a hole that is "filled with copper" so that the top layer can pass to the bottom.

( ) `} /> ## Plated Holes A plated hole is similar to a via but it's hollow so that you can push metal pins through it. This is important for chips that have big pins that need to fit into holes. Chips with big pins that must go through holes are called "through-hole" chips, and chips with small pins are called "surface-mount" chips. ( ) `} /> ## Unplated Holes "Regular Holes" Unplated holes or "regular holes" are just holes in the printed circuit board without any copper around them. They don't electrically connect anything, but can be very helpful for mounting the printed circuit board. ( ) `} /> ## Traces Traces are the wires that connect the components on a PCB. They are made of copper and mostly covered by green soldermask so that they don't accidentally conduct to each other if something conductive like a wire or piece of metal falls across them. We represent traces in PCB viewers with different colors depending on what layer they fall on. In tscircuit, traces are always autorouted, so you don't need to tell it which path to take- it'll automatically find one that makes sure it doesn't cross any other traces. Traces allow chips to "talk" to each other and for power to be shared across all chips. ( ) `} /> ## What are inner layers? Inner layers are layers of PCB that aren't visible, they're sandwiched on the inside. Sometimes this is useful when you have a lot of wires to connect and it's almost impossible to stop them from crossing each other.

Inner layers are layers of PCB that aren't visible, they're sandwiched on the inside. Excellent image from pcbway

--- title: tsci add --- `tsci add` is the same as `npm add` or `bun add`, but defaults to the tscircuit registry. If your project has the [tsci `.npmrc`](../web-apis/the-registry-api.md#using-the-tscircuit-npm-registry), you can just do `bun add @tsci/.` and it has the same effect. ``` > tsci add seveibar/PICO_W # Added @tsci/seveibar.PICO_W@0.0.1 ``` You can then import the module and use it for your board! ( ) `} /> --- title: tsci auth print-token --- `tsci auth print-token` prints your current tscircuit API token. This token can be used with the advanced web APIs such as the [Datasheet API](../web-apis/datasheet-api.md). ## Usage ```bash tsci auth print-token ``` Make sure you have previously logged in with [`tsci login`](./tsci-login.md). The command will output a token string that you can pass in the `Authorization: Bearer ` header of API requests. --- title: tsci build description: Generate circuit JSON from your source files --- `tsci build` runs the TSCircuit evaluator and writes `circuit.json` files. ## Usage ```bash tsci build [file] [--ignore-errors] [--ignore-warnings] ``` ### Arguments - `file` *(optional)* – path to a `.tsx` file to build. If omitted, the command searches for a project entrypoint such as `index.tsx` or the `mainEntrypoint` defined in `tscircuit.config.json`. In addition, all files matching the `*.circuit.tsx` pattern are built automatically. ### Output Output files are placed in a `dist/` directory relative to your project. The main entrypoint produces `dist/circuit.json`. Each `*.circuit.tsx` file generates its own subdirectory. For example, `src/blink.circuit.tsx` becomes `dist/src/blink/circuit.json`. ### Options - `--ignore-errors` – do not exit with code `1` on evaluation errors. - `--ignore-warnings` – suppress warning messages. Use this command before publishing or in CI to ensure your circuits evaluate correctly. --- title: tsci dev sidebar_position: 2 --- `tsci dev` runs a web server that lets you see a preview of your electronics in your web browser. After you run `tsci dev` you should see a preview of your entrypoint file in your web browser on https://localhost:3020 ![tsci dev result](../../static/img/tsci-dev.png) ![browser](../../static/img/pcb-runframe.png) --- title: tsci export --- import ImageWithCaption from "../../src/components/ImageWithCaption" ## Overview `tsci export` can be used to convert a `tsx` file or `circuit.json` file into various output formats including schematics, PCB layouts, fabrication files, and more. ## Usage ```bash tsci export [options] ``` ### Arguments - ``: Path to the source file (`.tsx` or `.circuit.json`) ### Options - `-f, --format `: Output format (defaults to "json") - `-o, --output `: Custom output file path ## Supported Formats The following export formats are supported: | Format | Description | |--------|-------------| | `circuit-json`| Circuit JSON format | | `schematic-svg` | Schematic view as SVG | | `pcb-svg` | PCB layout as SVG | | `readable-netlist` | Human-readable netlist | | `specctra-dsn` | Specctra DSN format for autorouting | ## Examples Export to circuit JSON: ```bash tsci export circuit.tsx ``` Export as schematic SVG: ```bash tsci export circuit.tsx -f schematic-svg ``` Export PCB layout with custom output path: ```bash tsci export circuit.tsx -f pcb-svg -o my-pcb-layout.svg ``` Export to Specctra DSN format: ```bash tsci export circuit.tsx -f specctra-dsn ``` ## Output Files By default, the exported file will be saved in the same directory as the input file, with a filename based on the input filename and the chosen format. For example: - Input: `my-circuit.tsx` - Format: `pcb-svg` - Default output: `my-circuit-pcb.svg` You can override the output location using the `-o` or `--output` option. --- title: tsci init sidebar_position: 0 description: Initialize a new TSCircuit project --- `tsci init` bootstraps a fresh project in the current directory. It creates the basic files needed to start developing a board, including: - `index.tsx` – your main circuit entrypoint - `package.json` with the required dependencies - `tsconfig.json` - `.gitignore` and other configuration files You can run the command interactively or pass `-y` to accept all defaults. ```bash mkdir my-circuit cd my-circuit # Initialize with prompts tsci init # or skip prompts tsci init -y ``` After initialization you will see a directory structure similar to the following: ```text my-circuit/ ├─ index.tsx ├─ package.json ├─ tsconfig.json └─ tscircuit.config.json ``` import tsciInitImage from "../../static/img/tsci-init.png"; import ImageWithCaption from "../../src/components/ImageWithCaption"; Next, run `tsci dev` to start the development server and view your circuit in the browser. --- title: tsci login sidebar_position: 1 --- `tsci login` allows you to login to the tscircuit registry. You don't need to login to tscircuit to use any tools, but logging in does enable the following great features: - Cloud Autorouting (`autorouter="auto-cloud"`) - Package Management (publishing and automatic bundling) :::info You don't need a tscircuit account to download and use other people's packages ::: `tsci login` will take you to a login page where you'll sign in with Github. After the login flow you'll have have token on your machine that authenticates you to publish packages or use the cloud autorouter. ## Logout To logout again, just run `tsci logout` ## Other Auth Functions Run `tsci auth --help` to see other auth functions, such as printing your token for use with the [Registry API](../web-apis/the-registry-api.md) --- title: tsci push sidebar_position: 2 description: | tsci push uploads your package to the tscircuit registry for module re-use --- tscircuit code, like React code, is distributed as a "package". `tsci push` uploads your package to the [tscircuit registry](https://tscircuit.com/trending) to enable sharing with your team. After publishing, you can use the [tsci add](https://docs.tscircuit.com/command-line/tsci-add) command to install your package as part of a larger circuit. After running `tsci push` you can see your package on your tscircuit registry page. Packages default to private visibility, but you can change this from your registry page to enable sharing your package with the broader ecosystem. import tsciPushImage from "../../static/img/tsci-push.png" import registrySnippetImage from "../../static/img/registry-snippet.png" import ImageWithCaption from "../../src/components/ImageWithCaption"; --- title: tsci search --- `tsci search` finds footprints and packages from across the tscircuit ecosystem. ## Usage ```bash $ tsci search resistor Found 10 footprint(s) from KiCad: 1. Resistor_SMD/R_01005_0402Metric_Pad0.57x0.30mm_HandSolder 2. Resistor_SMD/R_01005_0402Metric 3. Resistor_SMD/R_0201_0603Metric_Pad0.64x0.40mm_HandSolder 4. Resistor_SMD/R_0201_0603Metric 5. Resistor_SMD/R_0402_1005Metric_Pad0.72x0.64mm_HandSolder 6. Resistor_SMD/R_0402_1005Metric 7. Resistor_SMD/R_0603_1608Metric_Pad0.98x0.95mm_HandSolder 8. Resistor_SMD/R_0603_1608Metric 9. Resistor_SMD/R_0612_1632Metric_Pad1.18x3.40mm_HandSolder 10. Resistor_SMD/R_0612_1632Metric Found 11 package(s) in the tscircuit registry: 1. seveibar/usb-c-flashlight (vundefined) - Stars: 5 - A compact USB-C powered push button board with a red LED, utilizing a single current-limiting resistor for the LED indicator. 2. ArnavK-09/OPT4048DTSR (vundefined) - Stars: 3 - Sparkfun schematic with an 8-pin SOIC-8 IC (OPT4048) connected to a 3.3V power supply, ground, I2C bus lines (SCL, SDA), an address pin, an interrupt pin, plus a pull-up resistor and a decoupling capacitor. ... ``` Use any search term to discover related footprints or published projects. --- title: tsci snapshot description: Generate schematic and PCB snapshots for regression tests --- `tsci snapshot` renders your boards to SVG images and compares them with saved snapshots. ## Usage ```bash tsci snapshot [options] ``` ### Options - `-u, --update` – write new snapshots to disk. - `--3d` – also generate 3D preview snapshots. ### Which files are snapped? The command searches the current project for: - the detected entrypoint (using the same logic as `tsci build`) - any files matching `*.board.tsx` or `*.circuit.tsx` This pattern allows standalone board files (ending in `.circuit.tsx`) to be tested alongside your main project. ### Snapshot location Snapshots are stored next to each source file in a `__snapshots__` directory. For a file `test.board.tsx` you will see: ``` __snapshots__/test.board-pcb.snap.svg __snapshots__/test.board-schematic.snap.svg ``` If `--3d` is specified, a `-3d.snap.svg` is also produced. Running without `--update` verifies that the generated output matches the existing snapshots. Differences cause a non-zero exit code. --- title: Getting Started as a Contributor sidebar_position: 1 --- tscircuit is a great project to contribute to if you're familiar with Typescript and React. :::tip Make sure you've [joined the discord server](https://tscircuit.com/join) so we can help you get started and reviewed quickly! ::: tscircuit is composed of over 200 repositories, but every project uses [bun](https://bun.sh), so make sure to install bun before you start contributing. To contribute to tscircuit, you need to make [Pull Requests](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests) from a fork of a repository. :::tip You can quickly find issues (with or without bounties) by [spinning the wheel of issues](https://issues.tscircuit.com/) ::: ## Before You Start 1. Make sure bun is installed on your system 2. Make sure you've signed up at [tscircuit.com](https://tscircuit.com) and have followed a tutorial in the docs to create a circuit board ## Recommended Contribution Order We recommend the following order for contributing to tscircuit. Contributing to repositories in this order will make sure you have a good understanding of the tscircuit ecosystem. If you're not able to find an issue in the repo, ask on discord! Maintainers often forget to create issues even though there are many problems they need solved! ## 1. [tscircuit/schematic-symbols](https://github.com/tscircuit/schematic-symbols) Difficulty: ⭐ (easy) · [Issues](https://github.com/tscircuit/schematic-symbols/issues) · [Repo](https://github.com/tscircuit/schematic-symbols) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/schematic-symbols)](https://github.com/tscircuit/schematic-symbols/issues) This is a large repository of schematic symbols, you can view the [symbols here](https://symbols.tscircuit.com) ![Schematic Symbols Project](../../static/img/symbols.png) We also have a [video tutorial](https://blog.tscircuit.com/i/149495167/help-us-build-the-largest-library-of-schematic-symbols) for contributing to this project! ## 2. [tscircuit/footprinter](https://github.com/tscircuit/footprinter) Difficulty: ⭐⭐ (medium) · [Issues](https://github.com/tscircuit/footprinter/issues) · [Repo](https://github.com/tscircuit/footprinter) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/footprinter)](https://github.com/tscircuit/footprinter/issues) This is a project that generates the "footprint" where a chip is placed on a circuit board from a string. For example, you might turn the string "quad24" into the image below: ![Footprinter Project](../../static/img/footprinter.webp) Here's the [video tutorial for contributing to footprinter](https://blog.tscircuit.com/p/learn-how-to-contribute-to-tscircuits) ## 3. [tscircuit/cli](https://github.com/tscircuit/cli) Difficulty: ⭐⭐ (medium) · [Issues](https://github.com/tscircuit/cli/issues) · [Repo](https://github.com/tscircuit/cli) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/cli)](https://github.com/tscircuit/cli/issues) This is the main development tool for tscircuit. It provides a local development server and package management. The CLI is what you use when you run `tsci dev` or `tsci init`. ## 4. [tscircuit.com](https://github.com/tscircuit/tscircuit.com) Difficulty: ⭐⭐ (medium) · [Issues](https://github.com/tscircuit/tscircuit.com/issues) · [Repo](https://github.com/tscircuit/tscircuit.com) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/tscircuit.com)](https://github.com/tscircuit/tscircuit.com/issues) This is the main website for tscircuit, it features an editor for circuit boards! You should try it at [tscircuit.com](https://tscircuit.com)! There are a lot of issues in this repo, ## 5. [circuit-to-svg](https://github.com/tscircuit/circuit-to-svg) Difficulty: ⭐⭐ (medium) · [Issues](https://github.com/tscircuit/circuit-to-svg/issues) · [Repo](https://github.com/tscircuit/circuit-to-svg) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/circuit-to-svg)](https://github.com/tscircuit/circuit-to-svg/issues) This is a library that converts [Circuit JSON](https://github.com/tscircuit/circuit-json) into SVG files. We use this all over the place, including in almost all of our tests! ## 6. [tscircuit/core](https://github.com/tscircuit/core) Difficulty: ⭐⭐⭐ (hard) · [Issues](https://github.com/tscircuit/core/issues) · [Repo](https://github.com/tscircuit/core) [![GitHub issues](https://img.shields.io/github/issues/tscircuit/core)](https://github.com/tscircuit/core/issues) This is the core library that powers tscircuit. It contains all the logic for converting React components into circuit boards, schematics and PCBs. The core library is written in Typescript and uses React. It's a great project to contribute to if you want to learn about how tscircuit works under the hood. Here's a [video tutorial for contributing to core](https://blog.tscircuit.com/p/learn-how-to-contribute-to-tscircuits-core). --- title: Overview of Projects sidebar_position: 2 --- | Repo | Description | Open Issues | | ----------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- | | [tscircuit/core](https://github.com/tscircuit/core) | Core library that powers tscircuit, handles conversion of React components into circuit boards | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/core)](https://github.com/tscircuit/core/issues) | | [tscircuit/schematic-symbols](https://github.com/tscircuit/schematic-symbols) | Library of schematic symbols used across tscircuit | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/schematic-symbols)](https://github.com/tscircuit/schematic-symbols/issues) | | [tscircuit/footprinter](https://github.com/tscircuit/footprinter) | Generates PCB footprints from string descriptions | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/footprinter)](https://github.com/tscircuit/footprinter/issues) | | [tscircuit/circuit-to-svg](https://github.com/tscircuit/circuit-to-svg) | Converts Circuit JSON into SVG files | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/circuit-to-svg)](https://github.com/tscircuit/circuit-to-svg/issues) | | [tscircuit/tscircuit.com](https://github.com/tscircuit/tscircuit.com) | Main website and circuit board editor | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/tscircuit.com)](https://github.com/tscircuit/tscircuit.com/issues) | | [tscircuit/cli](https://github.com/tscircuit/cli) | Main development tool for tscircuit, provides local development server and package management | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/cli)](https://github.com/tscircuit/cli/issues) | | [tscircuit/runframe](https://github.com/tscircuit/runframe) | React component to preview and run tscircuit circuits | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/runframe)](https://github.com/tscircuit/runframe/issues) | | [tscircuit/pcb-viewer](https://github.com/tscircuit/pcb-viewer) | React component for viewing PCBs | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/pcb-viewer)](https://github.com/tscircuit/pcb-viewer/issues) | | [tscircuit/3d-viewer](https://github.com/tscircuit/3d-viewer) | React component for viewing 3D previews | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/3d-viewer)](https://github.com/tscircuit/3d-viewer/issues) | | [tscircuit/easyeda-converter](https://github.com/tscircuit/easyeda-converter) | Command line utility for converting JLCPCB footprints to tscircuit | [![GitHub issues](https://img.shields.io/github/issues/tscircuit/easyeda-converter)](https://github.com/tscircuit/easyeda-converter/issues) | --- title: Report an Autorouter Bug description: Learn how to report an autorouter bug so that the tscircuit team can fix it. --- import YouTubeEmbed from '../../src/components/YouTubeEmbed'; ## Overview You can report autorouter bugs by going to `Errors -> Open Autorouter Log -> Report Bug` inside the tscircuit interface. When you report a bug, your autorouting data is sent to the tscircuit API so that the autorouting developers can debug the issue. ## Simulating your bug with the Autorouting Debugger After you've created a bug report, you can take things a step further by downloading your reproduction to the codebase. To do this, you should do the following: 1. Clone the [tscircuit-autorouter](https://github.com/tscircuit/tscircuit-autorouter) repository. 2. Run `bun i` to install the dependencies. 3. Run `bun run bug-report ` to download the reproduction. This will output the name of your bug report directory 4. Run `bun run start` and search for your bug report directory, it will appear inside the autorouting debugger. ## Helping Contributors solve your autorouting bug - [Create a high density solving fixture for your problem](https://youtu.be/cANWCNp_ggg) --- title: The Contributor Handbook --- We have some important patterns that make contributing to tscircuit more consistent, we document these in [our handbook repo](https://github.com/tscircuit/handbook). Here are a couple of really important ones: 1. [Use Yalc](https://github.com/tscircuit/handbook/blob/main/guides/using-yalc.md) - tscircuit uses many repositories so it can be hard to test different repositories interacting. 2. [Code Styles](https://github.com/tscircuit/handbook/blob/main/guides/code.md) - tscircuit has some consistent code patterns we use in every project. This makes the code more universally understood. Definitely note the banned words section! Read the [full handbook here](https://github.com/tscircuit/handbook). --- title: sidebar_position: 4 description: >- A `` is a power source that provides electrical energy through electrochemical reactions. Batteries are essential components that supply power to electronic circuits and devices. They have a positive and negative terminal and must be connected with correct polarity. --- ## Overview A `` is a power source that provides electrical energy through electrochemical reactions. Batteries are essential components that supply power to electronic circuits and devices. They have a positive and negative terminal and must be connected with correct polarity. A battery element has two pins and is polarized, meaning it has a positive terminal (cathode) and a negative terminal (anode). The voltage and capacity of the battery determine how much power it can provide and for how long. When specifying a battery, you'll need to provide the voltage rating and optionally the capacity. Common battery types include AA, AAA, 9V, coin cells, and lithium-ion batteries. ( ) `} /> ## Pins A battery has the following pins and aliases: | Pin # | Aliases | Description | | ---------- | ------- | ----------- | | pin1 | pos, positive, cathode | The positive terminal that provides current | | pin2 | neg, negative, anode | The negative terminal that completes the circuit | :::warning Batteries are polarized components! You must connect the positive and negative terminals correctly. Reversing polarity can damage your circuit or the battery itself. ::: ## Specifications Batteries can be configured with these key properties: - **capacity** - The energy storage capacity specified in mAh or Ah e.g. `"2500mAh"`, `"1.2Ah"` ## Common Battery Types Here are some common battery types and their typical specifications: | Battery Type | Voltage | Typical Capacity | Chemistry | | ------------ | ------- | --------------- | --------- | | AA | 1.5V | 2000-3000mAh | Alkaline | | AAA | 1.5V | 800-1200mAh | Alkaline | | 9V | 9V | 400-600mAh | Alkaline | | CR2032 | 3V | 200-250mAh | Lithium coin cell | | 18650 | 3.7V | 2500-3500mAh | Lithium-ion | ## Schematic Orientation Batteries can display their positive and negative terminals in different orientations. Use the `schOrientation` property to control the symbol orientation. Valid orientation values are: - `horizontal` - `vertical` - `pos_left` - `pos_right` - `pos_top` - `pos_bottom` - `neg_left` - `neg_right` - `neg_top` - `neg_bottom` ```tsx ``` ## Usage Examples ### Basic Power Supply ```tsx ``` ### High Capacity Battery ```tsx ``` ### Small Capacity Battery ```tsx ``` :::tip When designing battery-powered circuits, consider adding battery monitoring circuitry to track voltage levels and prevent over-discharge, especially for rechargeable batteries. ::: --- title: description: >- A breakout is a container that lets you route nets out of a group at explicit points. --- ## Overview A `` is similar to a [``](./group.mdx) but is meant for situations where you want to guide the autorouter on exactly where connections should exit the group. Inside a breakout you can place [``](./breakoutpoint.mdx) elements to define those exit locations. ( ) `} /> ## Properties `` accepts all the layout properties of `` plus a few extras: | Property | Description | |----------|-------------| | `padding` | Uniform padding around the breakout region. | | `paddingLeft` / `paddingRight` / `paddingTop` / `paddingBottom` | Control padding for each side individually. | | `autorouter` | Autorouter configuration inherited by children. | --- title: description: >- Specifies a PCB location where a connection inside a breakout should exit. --- ## Overview A `` marks the XY coordinate that the autorouter should use when connecting a net or pin inside a [``](./breakout.mdx) to the rest of the board. Breakout points only exist on the PCB and do not have a schematic representation. ( ) `} /> ## Properties | Property | Description | |----------|-------------| | `connection` | Port or net selector inside the breakout that should connect here. | | `pcbX` / `pcbY` | Board coordinates of the breakout point. | --- title: sidebar_position: 3 description: >- A `` stores electrical energy in an electric field. Capacitors are commonly used for filtering, energy storage, and timing circuits. Unlike resistors, capacitors can be polarized (like electrolytic capacitors) or non-polarized (like ceramic capacitors). --- ## Overview A `` stores electrical energy in an electric field. Capacitors are commonly used for filtering, energy storage, and timing circuits. Unlike resistors, capacitors can be polarized (like electrolytic capacitors) or non-polarized (like ceramic capacitors). A capacitor element has two pins. Polarized capacitors must be placed with correct orientation to avoid damage. When specifying a capacitor, you'll need to provide a footprint string (like `0402` or `0805`) and capacitance value. Popular capacitor types and sizes can be found at [jlcsearch](https://jlcsearch.tscircuit.com/capacitors/list). ( ) `} /> ## Pins A capacitor has the following pins and aliases: | Pin # | Aliases (Polarized) | Description | | ---------- | ------- | ----------- | | pin1 | pos, anode, left | The positive terminal (required for polarized capacitors) | | pin2 | neg, cathode, right | The negative terminal (must be connected properly for polarized caps) | :::warning For polarized capacitors, you must connect the positive and negative pins correctly. Reversing polarity can cause capacitor failure or even explosion! ::: ## Specifications Capacitors can be configured with these key properties: - **capacitance** - The capacitance value specified as a string e.g. `"100nF"` or `"2.2μF"` - **voltageRating** - Maximum voltage the capacitor can handle e.g. `"25V"` - **tolerance** - Capacitance tolerance percentage e.g. `"±10%"` - **temperatureCoefficient** - Temperature stability specification e.g. `"X7R"` - **equivalentSeriesResistance** - ESR value for critical applications e.g. `"0.5Ω"` ## Automatic Part Selection Like resistors, tscircuit will automatically select suitable capacitor parts based on your specifications through the [platform parts engine](../guides/running-tscircuit/platform-configuration.md). For specialized capacitors (e.g., low ESR, high voltage), you may want to specify `supplierPartNumbers` explicitly. ## Schematic Orientation Polarized capacitors can display their positive and negative pins in different orientations. Use the `schOrientation` property to control the symbol orientation instead of manually setting `schRotation`. Valid orientation values are: - `horizontal` - `vertical` - `pos_left` - `pos_right` - `pos_top` - `pos_bottom` - `neg_left` - `neg_right` - `neg_top` - `neg_bottom` ```tsx ``` --- title: sidebar_position: 1 --- The `` is the most common and most powerful built-in tscircuit element. You can represent virtually any "single-part" electronic component with ``, it is extremely flexible. ## Simple Chips Here's an example of typical `` usage. We specify a footprint string and the pin labels that should be used for the schematic representation. { return ( ) } `} /> ## Customizing the Schematic Representation You can alter how a chip appears on the schematic by using the `schPinArrangement` , `schPinStyles` and `schWidth` properties. ### `schPinArrangement` `schPinArrangement` controls the arrangement of the pins on the schematic box representing the chip. You can use this to group similar pins together e.g. to group GPIO pins together. :::note `schPortArrangement` was renamed to `schPinArrangement` in 2025. ::: ( ) `} /> You can also place pins on the top or bottom of the schematic box. ( ) `} /> ### `schPinStyles` `schPinStyles` controls the style of the pins on the schematic box ( ) `} /> ### Custom Footprints Often you will have a chip that you want to carefully specify the position of each pad, plated hole, silkscreen line or other PCB element. To do this, just insert a `` component instead of string for the `footprint` prop. Here's an example of a chip with a custom footprint: ( } schPortArrangement={{ leftSide: { direction: "top-to-bottom", pins: [1, 3], }, rightSide: { direction: "bottom-to-top", pins: [4, 2], }, }} /> ) `} /> For more information about custom footprints, check out the [ element](./footprint.mdx) ### Internally Connected Pins Some chips, such as a standard 4 pin pushbutton, have pins that are internally connected. This can be useful to represent for simulation or to enable omitting pins from a schematic. ( ) `} /> :::note You may not want to do this for power or ground pins on boards where you're expected to connect the pins specifically externally. For example, if you have several V5 pins that each need a decoupling capacitor, it would be better to manage the connections explicitly with traces (perhaps using `maxTraceLength`!) even if they are internally connected. ::: ### Externally Connected Pins To indicate that pins should be externally connected, you can use the `externallyConnectedPins` props. Just like the `internallyConnectedPins` prop, this is an array of arrays of pin labels, where each sub-array represents a group of pins that should be connected together. ( ) `} /> ## Specifying the Manufacturer Part Number or Supplier Part Numbers tscircuit will attempt to find matching parts based on the `manufacturerPartNumber` and `footprint` that was provided. If you know the exact part from your supplier you'd like to use, you should set the `supplierPartNumbers` property as shown below: { return ( } cadModel={{ objUrl: "https://modelcdn.tscircuit.com/easyeda_models/download?uuid=973acf8a660c48b1975f1ba1c890421a&pn=C57759", rotationOffset: { x: 0, y: 0, z: 0 }, positionOffset: { x: 0, y: 0, z: 0 }, }} schPinSpacing={0.75} schPortArrangement={{ leftSide: { direction: "top-to-bottom", pins: [1], }, rightSide: { direction: "bottom-to-top", pins: [2], }, }} /> ) } `} /> If you don't specify `supplierPartNumbers`, tscircuit will automatically scan for in-stock parts and select a chip using vendor APIs in the Cloud API using the [platform parts engine](../guides/running-tscircuit/platform-configuration.md) ### Supported Suppliers The following are the supported supplier keys. The list is [maintained here](https://github.com/tscircuit/props/blob/main/lib/common/layout.ts#L56) and you can [request additional suppliers by creating an issue](https://github.com/tscircuit/props/issues/new?template=Blank+issue&title=Supplier%20Request%3A%20) Available supplier keys: - jlcpcb - digikey - mouser - macrofab - pcbway - lcsc You can also insert custom keys for your organization and they will be copied to the output [Circuit JSON](https://github.com/tscircuit/circuit-json) ## Type-safe Chips: `ChipProps` and Chip Selectors tscircuit has a type called `ChipProps` that can be used to properly define components that wrap a `` element. By using `ChipProps`, you're making it ```tsx import { sel, type ChipProps } from "tscircuit" const pinLabels = { pin1: "VCC", pin2: "DISCH", pin3: "THRES", pin4: "CTRL", pin5: "GND", pin6: "TRIG", pin7: "OUT", pin8: "RESET" } as const export const A555Timer = (props: ChipProps) => ( ) ``` :::warning Make sure to have `as const` when you're defining your `pinLabels`, if you're missing this the types won't work! ::: You can also use the `sel` object to access the pins of a chip for traces! ```tsx import { sel } from "tscircuit" import { A555Timer } from "./a555timer" import { PowerRegulator } from "./power-regulator" export default () => { return ( ) } ``` ## Importing Chips from JLCPCB, KiCad or Circuit JSON There are a lot of ways to import a chip configuration, each with their own guide! This is often much easier and reliable than configuring a chip yourself. - [Importing Components from JLCPCB](../guides/importing-modules-and-chips/importing-from-jlcpcb.mdx) - [Importing Components from KiCad](../guides/importing-modules-and-chips/importing-from-kicad.md) :::tip If you're only looking to use a standard footprint from KiCad, you can skip importing entirely by referencing the footprint directly with the `kicad:` prefix (e.g. `footprint="kicad:Resistor_SMD/R_0402_1005Metric"`). See [KiCad Footprints](/footprints/kicad-footprints) for details. ::: --- title: sidebar_position: 7 description: >- A crystal oscillator provides a stable clock signal essential for timing applications and microcontroller operations. --- ## Overview A crystal oscillator provides a stable clock signal essential for timing applications and microcontroller operations. ( )`} /> ## Properties | Property | Type | Description | Example | | ---------------- | --------------------- | ----------------------------------------------------------------------------------------------------- | ---------------------- | | `frequency` | number or string | The operating frequency of the crystal oscillator. | `16e6` or `"16MHz"` | | `loadCapacitance`| number or string | The load capacitance required for stable operation. | `18pF` | | `pinVariant` | PinVariant (optional) | Optional property to select a pin configuration variant if multiple options exist. | `"2pin"` | --- title: description: >- Diodes are semiconductor devices that allow current to flow primarily in one direction, making them ideal for rectification, signal clipping, and protection against reverse voltage. They are essential in power supply circuits and for protecting sensitive components from voltage spikes. --- ## Overview Diodes are semiconductor devices that allow current to flow primarily in one direction, making them ideal for rectification, signal clipping, and protection against reverse voltage. They are essential in power supply circuits and for protecting sensitive components from voltage spikes. ( ) `} /> In this example, the diode is placed on a board using the default footprint "smd-diode". ## Properties | Property | Type | Description | Example | | ---------------- | -------- | -------------------------------------- | ------- | | `forwardVoltage` | `number` | The forward voltage drop of the diode. | `0.7V` | ## Pins Diodes have two pins: - `pin1`/`anode`/`pos` - The positive terminal where current enters. - `pin2`/`cathode`/`neg` - The negative terminal where current exits. --- title: --- ## Overview Within a `` element you can define PCB elements such as [``](../footprints/platedhole.mdx) or [``](../footprints/smtpad.mdx). Here's an example of a chip with a custom footprint: ( } schPortArrangement={{ leftSide: { direction: "top-to-bottom", pins: [1, 3], }, rightSide: { direction: "bottom-to-top", pins: [4, 2], }, }} /> ) `} /> --- title: description: >- A `` is a safety device that protects electrical circuits by interrupting current flow when it exceeds a predetermined threshold. Fuses are essential for preventing damage to components and circuits from overcurrent conditions. --- ## Overview A `` is a safety device that protects electrical circuits by interrupting current flow when it exceeds a predetermined threshold. Fuses are essential for preventing damage to components and circuits from overcurrent conditions. A fuse element has two pins and is typically non-polar, meaning it can be placed in either direction. When the current through the fuse exceeds its current rating, the fuse "blows" or opens the circuit to prevent damage to downstream components. When specifying a fuse, you'll need to provide the current rating and optionally the voltage rating and footprint. Common fuse types include surface-mount, through-hole, and cartridge fuses. ( ) `} /> ## Pins A fuse has the following pins and aliases: | Pin # | Aliases | Description | | ---------- | ------- | ----------- | | pin1 | left, in | The input side pin in normal orientation | | pin2 | right, out | The output side pin in normal orientation | ## Properties | Property | Type | Required | Description | Example | | -------- | ---- | -------- | ----------- | ------- | | `currentRating` | `number \| string` | Yes | The current rating at which the fuse will blow | `"2A"`, `1.5`, `"500mA"` | | `voltageRating` | `number \| string` | No | The maximum voltage the fuse can safely interrupt | `"32V"`, `250` | | `schShowRatings` | `boolean` | No | Whether to display the ratings on the schematic symbol | `true`, `false` | | `schOrientation` | `string` | No | The orientation of the fuse in the schematic | `"left"`, `"right"`, `"up"`, `"down"` | ## Current Ratings Fuses are available in a wide range of current ratings from microamps to hundreds of amperes. Common current ratings include: - **Low current**: 100mA, 250mA, 500mA, 1A - **Medium current**: 2A, 3A, 5A, 10A - **High current**: 15A, 20A, 30A and above The current rating should be chosen based on the normal operating current of your circuit, typically 1.5-2x the expected current to avoid nuisance blowing. ## Voltage Ratings The voltage rating indicates the maximum voltage the fuse can safely interrupt when it blows. Common voltage ratings include: - **Low voltage**: 32V, 63V (for automotive and low-voltage applications) - **AC mains**: 125V, 250V (for household and industrial applications) - **High voltage**: 600V and above (for industrial and power applications) ## Schematic Display Options The `schShowRatings` property controls whether the current and voltage ratings are displayed on the schematic symbol. This can be helpful for documentation but may clutter dense schematics. The `schOrientation` property allows you to control how the fuse is oriented in the schematic layout for better routing and readability. --- title: description: A group is the basic container element that can contain other elements. --- ## Overview A group is the basic container element that can contain other elements. By default, a group doesn't have any effect on the circuit. ( ) `} /> ## Moving multiple components via a `` `` elements can be used to move multiple components at once. In the example below every schematic symbol inside the `` will be moved 5mm to the right and 3mm up. ```tsx ``` We can similarly use a `` to move multiple PCB elements at once: ```tsx ``` --- title: --- ## Overview A hole can be used for mounting and doesn't have any conductive properties, for a hole with a conductive ring of copper see [``](../footprints/platedhole.mdx). Holes do not have a schematic representation. Holes can be used inside of a [``](./footprint.mdx) or as a standalone element. ( )`} /> --- title: sidebar_position: 4 description: >- An `` stores electrical energy in a magnetic field when current flows through it. Inductors are commonly used in filters, oscillators, power supplies, and RF circuits. They oppose changes in current flow and can smooth out rapid current variations. --- ## Overview An `` stores electrical energy in a magnetic field when current flows through it. Inductors are commonly used in filters, oscillators, power supplies, and RF circuits. They oppose changes in current flow and can smooth out rapid current variations. An inductor element has two pins and is non-polar, meaning it doesn't matter which direction you place it (unlike capacitors, inductors work the same way regardless of orientation). When specifying an inductor, you'll need to provide a footprint string (like `0402`, `0603`, or larger sizes for higher inductance values) and inductance value. Popular inductor types and sizes can be found at [jlcsearch](https://jlcsearch.tscircuit.com/inductors/list). ( ) `} /> ## Pins An inductor has the following pins and aliases: | Pin # | Aliases | Description | | ---------- | ------- | ----------- | | pin1 | left, 1 | The first terminal of the inductor | | pin2 | right, 2 | The second terminal of the inductor | :::info Since inductors are non-polar components, pin1 and pin2 are functionally equivalent and can be connected in either direction. ::: ## Specifications Inductors can be configured with these key properties: - **inductance** - The inductance value specified as a string e.g. `"10μH"`, `"100nH"`, or `"1mH"` - **currentRating** - Maximum current the inductor can handle e.g. `"500mA"` or `"2A"` - **tolerance** - Inductance tolerance percentage e.g. `"±20%"` or `"±10%"` - **dcResistance** - DC resistance of the inductor windings e.g. `"0.1Ω"` - **saturationCurrent** - Current at which the inductor begins to saturate e.g. `"800mA"` - **selfResonantFrequency** - Frequency at which the inductor becomes capacitive e.g. `"100MHz"` ## Automatic Part Selection Like resistors and capacitors, tscircuit will automatically select suitable inductor parts based on your specifications through the [platform parts engine](../guides/running-tscircuit/platform-configuration.md). For specialized inductors (e.g., high-frequency RF inductors, power inductors with specific core materials), you may want to specify `supplierPartNumbers` explicitly. ## Common Use Cases ### Power Supply Filtering Inductors are essential in switching power supplies for energy storage and filtering: ( ) `} /> ### RF Circuits Small inductors are used in RF circuits for impedance matching and filtering: ( ) `} /> ## Footprint Guidelines Choose inductor footprints based on your power and frequency requirements: - **0402/0603** - Low-power, high-frequency applications (RF, small signal filtering) - **0805/1206** - Medium-power applications (DC-DC converters, general filtering) - **Larger packages** - High-power applications (power supplies, motor drives) - **Shielded inductors** - Applications requiring low EMI (switch-mode power supplies) Larger footprints generally allow for higher inductance values and current ratings, while smaller footprints are better for high-frequency applications. --- title: description: A simple connector that typically uses a pinrow footprint but can be used for custom layouts as well. --- ## Overview A `` represents a small multi-pin connector, commonly a male or female header using a `pinrow` style footprint. You can think of it as a flexible connector that can be placed anywhere on the board much like a ``. ( ) `} /> The example above is adapted from the [core tests](https://github.com/tscircuit/core/blob/main/tests/components/normal-components/jumper.test.tsx). ## Properties `` shares many of the common component properties such as `pcbX`, `pcbY` and `footprint`. The full TypeScript interface is defined in [`@tscircuit/props`](https://github.com/tscircuit/props/blob/main/lib/components/jumper.ts): ```ts export interface JumperProps extends CommonComponentProps { manufacturerPartNumber?: string pinLabels?: Record schPinStyle?: SchematicPinStyle schPinSpacing?: number | string schWidth?: number | string schHeight?: number | string schDirection?: "left" | "right" schPortArrangement?: SchematicPortArrangement /** Number of pins on the jumper (2 or 3) */ pinCount?: 2 | 3 /** * Groups of pins that are internally connected * e.g., [["1","2"], ["2","3"]] */ internallyConnectedPins?: string[][] } ``` Jumpers are often placed using footprints such as `pinrow8` or `pinrow6_female_rows2`, but you can also provide a custom `` just like with ``. ### Internally Connected Pins Use the `internallyConnectedPins` prop when the jumper has pins that should be shorted (bridged) together by default. Pins can be referenced by their labels. ( ) `} /> | Property | Type | Description | | -------- | ---- | ----------- | | `pinCount` | `2` \| `3` | Number of pins on the jumper | | `internallyConnectedPins` | `string[][]` | Groups of pins that are internally connected | | `manufacturerPartNumber` | `string` | Manufacturer part number | | `pinLabels` | `Record` | Labels for pins or sets of pins | | `schPinStyle` | `SchematicPinStyle` | Style used for pins in the schematic | | `schPinSpacing` | `number` \| `string` | Spacing between schematic pins | | `schWidth` | `number` \| `string` | Width of the schematic symbol | | `schHeight` | `number` \| `string` | Height of the schematic symbol | | `schDirection` | `"left"` \| `"right"` | Direction the jumper faces in the schematic | | `schPortArrangement` | `SchematicPortArrangement` | Arrangement of ports in the schematic | --- title: description: >- Light emitting diodes are diodes that emit light when current passes through them. They are commonly used as indicators on a circuit board such as a "power on indicator" or "data transfer in progress indicator --- ## Overview Light emitting diodes are [diodes](./diode.mdx) that emit light when current passes through them. They are commonly used as indicators on a circuit board such as a "power on indicator" or "data transfer in progress indicator". ( ) `} /> ## Properties | Property | Example Value | Description | | ---------------- | ------------- | ---------------------------------------------------------------- | | `color` | `red` | The color of the LED. `red` LEDs are most common. | | `forwardVoltage` | `1.6V` | The voltage drop across the LED when forward current is applied. | ### Common LED Footprints The following represent the most common footprints for LEDs based on [jlcsearch](https://jlcsearch.tscircuit.com), you can provide these as the `footprint` property to the `led` element e.g. `` | Footprint | ~JLCPCB Popularity | | --------- | ------------------ | | `led0603` | 37% | | `led0805` | 23% | | `led1206` | 10% | | `led0402` | 4% | ## Automatic Part Selection LEDs are automatically selected according to their color and footprint using the [platform parts engine](../guides/running-tscircuit/platform-configuration.md) --- title: description: >- A MOSFET or "metal-oxide-semiconductor field-effect transistor" is a type of transistor that is used to control the flow of current through a circuit. --- ## Overview A MOSFET or "metal-oxide-semiconductor field-effect transistor" is a type of transistor that is used to control the flow of current through a circuit. ( ) `} /> ## Properties | Property | Description | Example | | ------------- | --------------------------------------------------- | ------------- | | `channelType` | The type of channel the MOSFET has (`n`, `p`) | `"n"` | | `mosfetMode` | The mode of the MOSFET (`enhancement`, `depletion`) | `"depletion"` | --- title: sidebar_position: 6.5 description: >- The `` element represents a bunch of traces that are all connected. You should use nets for representing power buses such as "V5", "V3_3" and "GND" --- ## Overview The `` element represents a bunch of traces that are all connected. You should use nets for representing power buses such as "V5", "V3_3" and "GND" When using a ``, you're being less specific than when you explicitly connect ports with `` elements. A net simply groups together traces that share the same name, letting the autorouter handle the actual routing between them. ( ) `} /> ## Net Properties Nets can have properties that will pass onto any PCB trace within them. The trace properties can be automatically used for autorouting adjustments or to validate connections (such as validating that a chip is connected to a power source) | Property | Description | | -------- | ----------- | | `isForPower` | The net is used to deliver power ("V5", "V3_3") | | `isGround` | The net is used as a ground path | ## Implicit Nets If you use a net in a [port or net selector](../guides/tscircuit-essentials/port-and-net-selectors.md) e.g. `"net.V5"` and there is not ``, then you are implicitly creating that net. tscircuit treats it exactly as if you had declared `` in your design. --- title: description: >- The `` element attaches a text label to a net on the schematic. It replaces the old `` element. --- ## Overview `` places a small label on a schematic net so you can easily identify power rails and other connections. It is especially useful in conjunction with the `connections` prop of components or modules to show where a net connects. The preview below uses `leftView="code"` and `rightView="schematic"` to show the schematic alongside the example code. ( ) `} /> ## Properties | Property | Description | Example | | -------- | ----------- | ------- | | `net` | Name of the net that the label represents | `"VCC"` | | `connection` | [Port selector](../guides/tscircuit-essentials/port-and-net-selectors.md) of the point the label attaches to | `"U1.VCC"` | | `anchorSide` | Which side of the connection to place the label. One of `"top"`, `"bottom"`, `"left"`, or `"right"` | `"top"` | | `schX`, `schY` | Position of the label on the schematic | `0`, `-1` | | `text` | Custom text for the label (defaults to the net name) | `"V3_3"` | Use `` to clearly mark nets in your schematic, especially for power rails or when multiple wires join at a single connection point. --- title: description: The `` element is used to create a male or female pin header with configurable spacing and number of pins. --- ## Overview The `` element is used to create a male or female pin header with configurable spacing and number of pins. ## Example ( ) `} /> ## Properties | Property | Type | Default | Description | |----------|------|---------|-------------| | pinCount | number | (required) | Number of pins in the header | | pitch | number \| string | "2.54mm" | Distance between pins | | schFacingDirection | "up" \| "down" \| "left" \| "right" | "right" | Direction the header faces in schematic view | | gender | "male" \| "female" | "male" | Whether the header is male or female | | showSilkscreenPinLabels | boolean | false | Whether to show pin labels in silkscreen | | doubleRow | boolean | false | Whether the header has two rows of pins | | holeDiameter | number \| string | "1mm" | Diameter of the through-hole for each pin | | platedDiameter | number \| string | "1.7mm" | Diameter of the plated area around each hole | | pinLabels | string[] | undefined | Labels for each pin | | facingDirection | "left" \| "right" | "right" | Direction the header is facing | | x | number | 0 | X position of the component | | y | number | 0 | Y position of the component | | rotation | number | 0 | Rotation of the component in degrees | | id | string | auto-generated | Unique identifier for the component | --- title: description: >- A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. You can also attach two terminals to create a variable resistor. --- ## Overview A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. You can also attach two terminals to create a variable resistor. ( ) `} /> ## Variants (two or three terminals) The `` element can be configured with two or three terminals using the `pinVariant` prop. | Pin Variant | Description | | ----------- | ----------- | | `two_pin` | Two terminals | | `three_pin` | Three terminals | ( ) `} /> --- title: description: >- Pushbuttons a common type of switch normally open momentary switch. They are commonly used as a reset or pairing button. --- ## Overview Pushbuttons a common type of switch normally open momentary switch. They are commonly used as a reset or pairing button. ( ) `} /> ## Pins | Pin | Aliases | Description | | ------- | -- |----------- | | `1` | `side1` | One of the left side pins | | `2` | `side1` | One of the left side pins | | `3` | `side2` | One of the right side pins | | `4` | `side2` | One of the right side pins | :::info The pins are internally connected, so you only need to connect one of the left or right pins. ::: ## Example: A small keyboard grid of pushbuttons ( {grid({ rows: 3, cols: 3, }).map((cell) => ( ))} ) `} /> --- title: sidebar_position: 2 description: >- A `` is an extremely common element of electronic designs. It limits the flow of electricity and is critial to making sure digital signals are properly "pulled up" or "pulled down" to set their default value as `1` or `0` --- ## Overview A `` is an extremely common element of electronic designs. It limits the flow of electricity and is critial to making sure digital signals are properly "pulled up" or "pulled down" to set their default value as `1` or `0` A resistor element has two pins and is non-polar, meaning it doesn't matter if you place it on backwards (it resists electricity identically either way!) When specifying a resistor, you'll usually want to give it a footprint string such as `0402` or `0603` to indicate it's size. You can see the most popular resistor sizes for different power ratings at [jlcsearch](https://jlcsearch.tscircuit.com/resistors/list) ( ) `} /> ## Pins A resistor has the following pins and aliases | Pin # | Aliases | Description | | ---------- | ------- | ----------- | | pin1 | left, pos | The left side pin in normal orientation | | pin2 | right, neg | The right side pin in normal orientation | :::note For convenience, you can use the `pos` and `neg` aliases for the resistor. This can help to remember which pin is which for the purpose of pulling up or pulling down a signal, but the resistor is non-polar so `pos`/`neg` are meaningless. ::: ## Tolerances Resistors can be made to different tolerances. In particular, you might care about the following resistor characteristics: - **tolerance** - a percentage given with a string, e.g. `tolerance="5%"`. This specifies how accurate the resistance needs to be - **powerRating** - a wattage e.g. "5W" indicating how much power can transfer through the resistor for normal operation - **temperatureOperatingRange** - a string indicating the listed range for the resistor's operating temperature `"-15F-150F"` ## Automatic Part Selection You generally don't need to specify `supplierPartNumbers` with a resistor, tscircuit will use the [platform parts engine](../guides/running-tscircuit/platform-configuration.md) to automatically search vendors for a part matching your tolerances. --- title: --- ## Overview Resonators are common components used to provide a stable frequency reference for circuits. They are often used in clock circuits or as a timing element. ( ) `} /> --- title: description: The `` element places text directly on the schematic. --- ## Overview `` is a primitive element used to display standalone text on the schematic. It does not appear on the PCB. ( ) `} /> ## Properties | Property | Type | Description | |---------|------|-------------| | `text` | string | The text string to render. | | `schX` | length | X coordinate of the text. | | `schY` | length | Y coordinate of the text. | | `anchor` | enum | Anchor position such as `"center"`, `"left"`, `"right"`, `"top"`, `"bottom"`, or corner positions. Defaults to `"center"`. | | `fontSize` | number | Font size in schematic units. Default `1`. | | `color` | string | Color of the text, specified as a hex string. Default `"#000000"`. | | `schRotation` | angle | Rotation of the text in degrees. Default `0`. | --- title: description: Small pads that can be cut or bridged with solder for configuration options. --- ## Overview A `` is a tiny jumper made from exposed pads on the PCB. These pads can be bridged or cut to change the circuit after manufacturing. While a regular `` usually uses a header-style footprint, solder jumpers are often just copper pads separated by a thin gap. ( ) `} /> This snippet is based on the tests from [tscircuit/core](https://github.com/tscircuit/core/blob/main/tests/components/normal-components/solderjumper.test.tsx). If you provide the `bridgedPins` property, tscircuit will create a small trace connecting those pins by default. You can cut the trace to open the connection or solder across the pads to reconnect them. ## Properties The `` component extends `` with one additional property. From [`@tscircuit/props`](https://github.com/tscircuit/props/blob/main/lib/components/solderjumper.ts): ```ts export interface SolderJumperProps extends JumperProps { /** Pins that are bridged with solder by default */ bridgedPins?: string[][] } ``` Use solder jumpers when you need a configuration option that can be easily changed with a soldering iron. --- title: description: >- A `` is a powerful organizational element in tscircuit that represents a collection of elements that are tightly coupled. Subcircuits are often used for a small functional block, such as a voltage regulator. --- ## Overview A `` is a powerful organizational element in tscircuit that represents a collection of elements that are tightly coupled. Subcircuits are often used for a small functional block, such as a voltage regulator. Within a subcircuit, you can have a custom autorouter or isolated nets from the larger circuits. You can also re-use reference designators. Your subcircuit is essentially isolated from other subcircuits. ( ) `} /> ## Reuse Reference Designators Reusing reference designators is typically considered a bad practice, but in tscircuit reference designators are intelligently prefixed prior to being written on the silkscreen. This means that you can design your subcircuits without worrying about whether or not a reference designator has been previously used. Within a subcircuit, you'll never select inside of another subcircuit without explicitly specifying the subcircuit `name` in a selector. This means you never need to worry about other `R1` or `C1` selectors from other subcircuits, they will not be selected unless you explicitly include a subcircuit selector e.g. `.somesubcircuit .R1` ( ) `} /> ## Configuring the Autorouter Subcircuits can have a custom autorouter configuration. This will be inherited by any children subcircuits. To specify a custom autorouter configuration, just set the `autorouter` property on a `` element. ```tsx {/* ... */} ``` Specifying custom autorouter settings for subcircuits can be extremely useful when you have a tricky section of components that have special requirements. Read more about [the autorouter prop here](./board.mdx#setting-the-autorouter). --- title: description: A switch is a mechanical device that can be used to connect or disconnect a circuit. --- ## Overview A switch is a mechanical device that can be used to connect or disconnect a circuit. ( ) `} /> ## Properties | Property | Type | Description | | -------- | -------- | -------- | | `type` | `"spst"` \| `"spdt"` \| `"dpst"` \| `"dpdt"` | The type of switch | | `isNormallyClosed` | `boolean` | Whether the switch is normally closed | ## Types of Switches | Type | Description | | ---- | ----------- | | `spst` | Single Pole Single Throw - The simplest switch type with one input and one output | | `spdt` | Single Pole Double Throw - One input that can be connected to either of two outputs | | `dpst` | Double Pole Single Throw - Two separate inputs each connecting to their own output | | `dpdt` | Double Pole Double Throw - Two separate inputs that can each connect to either of two outputs | ( ) `} /> ## When to use `` vs `` You should always use `` or any more specific switch element when possible. `` is a more generic element with less defaults. --- title: sidebar_position: 5 description: >- The `` element represents an electrical connection between two or more points in your circuit. Traces can connect components, nets, or specific pins on components. --- ## Overview The `` element represents an electrical connection between two or more points in your circuit. Traces can connect components, nets, or specific pins on components. ## Basic Usage Here's a simple example connecting two components: ( ) `} /> ## Trace Properties | Property | Description | Example | | -------- | ----------- | ------- | | `from` | Starting point of the trace using a [port selector](../guides/tscircuit-essentials/port-and-net-selectors.md) | `".R1 > .pin1"` | | `to` | Ending point of the trace using a [port selector](../guides/tscircuit-essentials/port-and-net-selectors.md) | `".C1 > .pin1"` | | `maxLength` | Maximum length the trace can be (optional) | `"10mm"` | | `minLength` | Minimum length the trace must be (optional) | `"5mm"` | | `width` | Width of the trace (optional) | `"0.2mm"` | | `pcbPath` | Array of points defining a manual PCB path relative to an anchor port | `[{ x: 1, y: 0 }, { x: 1, y: 1 }]` | | `pcbPathRelativeTo` | Port selector that `pcbPath` coordinates are relative to (defaults to the `from` port) | `".R1 > .pin2"` | ## Connecting to Nets Traces can connect to named nets like power and ground: ( ) `} /> ## Autorouting Traces are automatically routed by tscircuit's [autorouting system](./board.mdx#setting-the-autorouter). The autorouter will: 1. Find a path between components that doesn't intersect other traces 2. Use vias to change layers when needed 3. Respect any length constraints specified 4. Try to minimize the number of vias used You can customize the autorouting behavior by setting the `autorouter` property on the parent [``](./board.mdx) or [``](./subcircuit.mdx). ## Manual PCB Paths Sometimes you may want to manually specify the exact path a trace should take on the PCB. Provide a list of points with `pcbPath` to override autorouting and draw the route yourself. The coordinates are relative to a specific port defined by `pcbPathRelativeTo` (defaults to the `from` port). ( ) `} /> ## Length Constraints Sometimes you need traces to be exactly a certain length, like for high-speed signals. You can use `maxLength` and `minLength`: ( ) `} /> ## Differential Pairs For high-speed signals, you often need pairs of traces to have matched lengths. You can use the `differentialPairKey` property to group traces: :::info The `differentialPairKey` property is in beta and not available on all autorouters yet! ::: ( ) `} /> The autorouter will ensure both traces in the pair have the same length. ## Net vs Direct connections There are generally two ways that traces are represented on a PCB "Rats Nest" or on a schematic and they have very different results: - **Net** - A trace that connects a net to a component pin. - `` - **Direct** - A trace that connects two component pins directly. - `` When you specify a trace with a net, the autorouter will look for the best place to tie into the net. This means you're not specifying the exact location where the trace will go. When using net connections we use a Rats Nest on a PCB view or a net label on a schematic view. When you see a dotted line on a Rats Nest, you should think of it as a _possible_ connection point, but not necessarily the final place where the autorouter will connect to the net. --- title: description: >- A transistor is a three-terminal semiconductor device that can amplify or switch electronic signals. It is a fundamental component in many electronic circuits, including amplifiers, oscillators, and digital logic gates. --- ## Overview A transistor is a three-terminal semiconductor device that can amplify or switch electronic signals. It is a fundamental component in many electronic circuits, including amplifiers, oscillators, and digital logic gates. ( ) `} /> There are different types of transistors, so where possible you should use the most specific element to represent your use case - [``](./transistor.mdx) - Generic transistor - [``](./mosfet.mdx) - MOSFET transistor ## Properties | Property | Description | Example | | -------- | --------------------------------------------------------------- | ------- | | `type` | The type of transistor (`npn`, `pnp`, `mosfet`, `igbt`, `jfet`) | `"npn"` | --- title: description: >- A via is a plated hole that connects different layers of a PCB. Vias are commonly used to route traces between layers and for thermal management. --- ## Overview A via is a plated hole that connects different layers of a PCB. Vias are commonly used to route traces between layers and for thermal management. Vias do not have a schematic representation. You generally do not need to manually create vias, they will be handled automatically by the [autorouter](./board.mdx#setting-the-autorouter). ( )`} /> ## Properties | Property | Type | Default | Description | |----------|------|---------|-------------| | fromLayer | string | "top" | Starting layer for the via | | toLayer | string | "bottom" | Ending layer for the via | | holeDiameter | number \| string | "0.4mm" | Diameter of the plated hole | | outerDiameter | number \| string | "0.8mm" | Outer diameter of the copper annular ring | | x | number | 0 | PCB X position of the via | | y | number | 0 | PCB Y position of the via | --- title: description: >- The `` element is used to enforce geometric relationships between different elements in a PCB footprint. Constraints can set specific distances and alignments, such as center-to-center, edge-to-edge, or ensuring two elements line up along the same axis. --- ## Overview The `` element is used to enforce geometric relationships between different elements in a PCB footprint. Constraints can set specific distances and alignments, such as center-to-center, edge-to-edge, or ensuring two elements line up along the same axis. Below is a reference example that demonstrates how constraints are used within a footprint. This example is part of a test suite to validate that a KeyswitchSocket component is correctly flipped when placed on different layers of a board. ( {/* */} } /> ) export default () => ( ) `} /> ## Key Constraints Summary - ``: Defines a constraint based on the center positions of two elements. - ``: Sets a fixed distance between the edges of two elements. - ``: Ensures that multiple elements share the same Y coordinate. Use these constraints to help align footprint elements consistently across your designs. --- title: description: The `` element adds fabrication layer callouts and build notes for assemblers. --- ## Overview `` lets you drop short build notes directly onto the PCB fabrication layer. These notes are useful for communicating assembly instructions such as "do not populate" or "install on second pass" to your manufacturer. Fabrication notes are only exported with fabrication outputs—they do not appear on the silkscreen or schematic. ## Basic Usage Below is a simple board with a fabrication note reminding the assembler about a special assembly step. The note is positioned by its PCB coordinates and can be aligned using `anchorAlignment` to point at a specific area of the board. ( ) `} /> ## Properties | Property | Type | Description | |---------|------|-------------| | `text` | string | Message to display on the fabrication drawing. | | `pcbX` | length | X coordinate of the note, measured in PCB units (defaults to `0`). | | `pcbY` | length | Y coordinate of the note, measured in PCB units (defaults to `0`). | | `anchorAlignment` | enum | Alignment of the anchor point relative to the text. Options: `"center"`, `"top_left"`, `"top_right"`, `"bottom_left"`, `"bottom_right"`. Defaults to `"center"`. | | `fontSize` | length | Height of the rendered text. Defaults to `1mm` if not provided. | | `font` | enum | Currently `"tscircuit2024"`. Optional—rarely needs to be changed. | | `color` | string | Optional hex color to highlight the note in previews. | | `pcbRelative` | boolean | When `true`, `pcbX`/`pcbY` are relative to the parent group instead of the board origin. | | `relative` | boolean | Similar to `pcbRelative`, but also applies to schematic coordinates when used inside groups. | ## Tips - Keep fabrication notes concise so they remain legible when exported to Gerbers or assembly drawings. - Use distinct `anchorAlignment` values to align the note with the area or component it refers to. - Combine fabrication notes with [``](../elements/group.mdx) to move related callouts together when laying out subassemblies. - Fabrication notes are separate from silkscreen text—they will not print on the final PCB silkscreen layer. --- title: Footprint Elements vs Strings sidebar_position: 1 --- When setting the `footprint` property for an element, you can either use [footprinter strings](./footprinter-strings.mdx) or use the [``](../elements/footprint.mdx) element and manually specify pad positions. Footprinter strings are often quicker, more concise, and have the benefit of often mapping to a 3d model. ( } pcbX={3} resistance="1k" /> ) `} /> --- title: Footprinter Strings sidebar_position: 2 description: >- You can quickly specify the footprint and 3d model for any element by setting the `footprint` property to a string. --- ## Overview You can quickly specify the footprint and 3d model for any element by setting the `footprint` property to a string. import FootprintPreview from "@site/src/components/FootprintPreview" ## dip Dual in-line package. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `p` | `"2.54mm"` | Pitch. Space between pins | | `id` | `"1mm"` | Inner diameter (hole diameter) of plated holes | | `od` | `"1.5mm"`| Outer diameter (copper diameter) of plated holes | | `w` | `"300mil"` | Distance between columns | | `wide` | `false` | Wide DIP style (600mil between columns) | | `narrow` | `true` | Narrow DIP style (300mil between columns) | ## axial Basic through-hole “axial” resistor or diode footprint. Examples: - `axial` - `axial_p0.1in` `axial` parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `p` | `"2.54mm"` | Pitch. Space between pins | | `id` | `"0.7mm"` | Inner diameter (hole diameter) of plated holes | | `od` | `"1mm"` | Outer diameter (copper diameter) of plated holes | ## 0402 Standard imperial 0402 package. `1.0mm × 0.5mm` ## 0603 Standard imperial 0603 package. `1.6mm × 0.8mm` ## 0805 Standard imperial 0805 package. `2.0mm × 1.2mm` ## 1206 Standard imperial 1206 package. `3.2mm × 1.6mm` ## 1210 Standard imperial 1210 package. `3.2mm × 2.5mm` ## soic Small Outline Integrated Circuit (SOIC) footprint. **Parameters:** | Parameter | Default | Description | |---------------|------------|-------------------------------------------------------------------------| | `num_pins` | `8` | Number of pins in the package. | | `w` | `"5.3mm"` | Overall package width. | | `p` | `"1.27mm"` | Pin pitch (center-to-center distance between adjacent pins). | | `pl` | `"1.0mm"` | Pin length. | | `pw` | `"0.6mm"` | Pin width. | | `legsoutside` | `false` | If true, positions pins outside the package body; otherwise, pins are inset. | --- ## bga Ball Grid Array (BGA) footprint. **Parameters:** | Parameter | Default | Description | |-------------|---------------|----------------------------------------------------------------------------------| | `num_pins` | `64` | Total number of solder balls. | | `grid` | _calculated_ | Grid dimensions as an object (e.g. `{ x: N, y: N }`). If unspecified, a square grid is assumed. | | `p` | `"0.8mm"` | Ball pitch: center-to-center distance between adjacent balls. | | `w` | _none_ | Package width (optional). | | `h` | _none_ | Package height (optional). | | `ball` | _none_ | Ball diameter (optional). | | `pad` | _none_ | Pad size for each ball (optional). | | `tlorigin` | `false` | Use top-left numbering for balls. | | `blorigin` | `false` | Use bottom-left numbering for balls. | | `trorigin` | `false` | Use top-right numbering for balls. | | `brorigin` | `false` | Use bottom-right numbering for balls. | | `missing` | `[]` | List of balls to omit (by number or position) to accommodate design needs. | ## tssop Thin-Shrink Small Outline Package (TSSOP) footprint. Default configuration is 6.1mm width with 0.65mm pitch. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `8` | Number of pins in the package | | `w` | `"6.1mm"` | Overall package width | | `p` | `"0.65mm"` | Pin pitch (center-to-center distance between adjacent pins) | | `pw` | _calculated_ | Pin width (calculated from pitch if not specified) | | `pl` | _calculated_ | Pin length (calculated from pin width if not specified) | ## stampboard A breakout board with configurable pins on all sides. Can include inner holes for mounting. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `w` | `"22.58mm"` | Board width | | `h` | _calculated_ | Board height (calculated from number of pins if not specified) | | `left` | `20` | Number of pins on left side | | `right` | `20` | Number of pins on right side | | `top` | `2` | Number of pins on top side | | `bottom` | `2` | Number of pins on bottom side | | `p` | `"2.54mm"` | Pin pitch | | `pw` | `"1.6mm"` | Pin width | | `pl` | `"2.4mm"` | Pin length | | `innerhole` | `false` | Whether to include inner mounting holes | | `innerholeedgedistance` | `"1.61mm"` | Distance of inner holes from edge | ## stampreceiver Similar to stampboard but with modified pad dimensions for receiving a stampboard component. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `w` | `"22.58mm"` | Board width | | `h` | _calculated_ | Board height (calculated from number of pins if not specified) | | `left` | `20` | Number of pins on left side | | `right` | `20` | Number of pins on right side | | `top` | `2` | Number of pins on top side | | `bottom` | `2` | Number of pins on bottom side | | `p` | `"2.54mm"` | Pin pitch | | `pw` | `"1.6mm"` | Pin width | | `pl` | `"3.2mm"` | Pin length | | `innerhole` | `false` | Whether to include inner mounting holes | | `innerholeedgedistance` | `"1.61mm"` | Distance of inner holes from edge | ## hc49 Standard HC49 crystal footprint. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `p` | `"4.88mm"` | Pin pitch | | `id` | `"0.6mm"` | Inner diameter of plated holes | | `od` | `"1.2mm"` | Outer diameter of plated holes | | `w` | `"5.6mm"` | Package width | | `h` | `"3.5mm"` | Package height | ## to92 TO-92 transistor package footprint, available in triangular or inline arrangements. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `p` | `"1.27mm"` | Pin pitch | | `id` | `"0.72mm"` | Inner diameter of plated holes | | `od` | `"0.95mm"` | Outer diameter of plated holes | | `w` | `"4.5mm"` | Package width | | `h` | `"4.5mm"` | Package height | | `arrangement` | `"triangular"` | Pin arrangement, either "triangular" or "inline" | ## to220 TO-220 package footprint with configurable number of pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `3` | Number of pins (specify using format "to220_N") | | `p` | `"5.0mm"` | Pin pitch | | `id` | `"1.0mm"` | Inner diameter of plated holes | | `od` | `"1.9mm"` | Outer diameter of plated holes | | `w` | `"13mm"` | Package width | | `h` | `"7mm"` | Package height | ## ssop Shrink Small Outline Package (SSOP) footprint. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `8` | Number of pins in the package | | `w` | `"3.9mm"` | Overall package width | | `p` | `"1.27mm"` | Pin pitch (center-to-center distance between adjacent pins) | | `pw` | _calculated_ | Pin width (calculated from pitch if not specified) | | `pl` | _calculated_ | Pin length (calculated from pin width if not specified) | ## sop8 8-pin Small Outline Package (SOP) footprint. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `8` | Fixed at 8 pins | | `w` | _inherited_ | Overall package width | | `p` | _inherited_ | Pin pitch | | `pl` | `"1.5mm"` | Pin length | | `pw` | `"0.6mm"` | Pin width | ## qfp Quad Flat Package (QFP) footprint with configurable number of pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `32` | Total number of pins (must be divisible by 4) | | `body_size` | `"7mm"` | Size of the package body (square) | | `p` | `"0.8mm"` | Pin pitch (center-to-center distance between adjacent pins) | | `pw` | `"0.25mm"` | Pin width | | `pl` | `"0.6mm"` | Pin length (exposed pad length) | ## qfn Quad Flat No-Lead (QFN) package footprint with configurable number of pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `20` | Total number of pins (must be divisible by 4) | | `body_size` | `"4mm"` | Size of the package body (square) | | `p` | `"0.5mm"` | Pin pitch (center-to-center distance between adjacent pins) | | `pw` | `"0.25mm"` | Pin width | | `pl` | `"0.4mm"` | Pin length (exposed pad length) | ## sot23 Small Outline Transistor (SOT-23) footprint with 3 pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `3` | Fixed at 3 pins | | `body_size` | `"2.9mm"` | Size of the package body | | `p` | `"0.95mm"` | Pin pitch | | `pw` | `"0.4mm"` | Pin width | | `pl` | `"0.6mm"` | Pin length | ## sot23_5 Small Outline Transistor (SOT-23-5) footprint with 5 pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `5` | Fixed at 5 pins | | `body_size` | `"2.9mm"` | Size of the package body | | `p` | `"0.95mm"` | Pin pitch | | `pw` | `"0.4mm"` | Pin width | | `pl` | `"0.6mm"` | Pin length | ## sot223 Small Outline Transistor (SOT-223) footprint with 4 pins. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | `4` | Fixed at 4 pins | | `body_size` | `"6.5mm"` | Size of the package body | | `p` | `"2.3mm"` | Pin pitch | | `pw` | `"0.7mm"` | Pin width | | `pl` | `"0.8mm"` | Pin length | ## pinrow Row of pins suitable for male or female pin headers. If `_male` or `_female` is specified the 3d model will update accordingly. Parameters: | Parameter | Default | Description | |-----------|---------|-------------| | `num_pins` | | Number of pins | | `p` | `"2.3mm"` | Pin pitch | | `id` | `"1mm"` | Inner diameter | | `od` | `"1.5mm"` | Outer diameter | | `male` | `true` | Male header | | `female` | `false` | Female header | --- title: description: >- The `` element is used to represent a plated through hole on a PCB. --- ## Overview The `` element is used to represent a plated through hole on a PCB. ( } /> ) `} /> ## Plated Hole Shapes There are 3 types of plated holes: - `circle` - A circular plated hole - `oval` - An oval plated hole - `pill` - A pill-shaped plated hole (rounded rectangle) Each shape has different properties ## Properties | Property | Shape | Description | | ------------- | ---------- | ---------------------------------------------- | | holeDiameter | circle | The diameter of the inner hole | | outerDiameter | circle | The diameter of the outer copper pad | | innerWidth | oval, pill | The width of the inner hole | | innerHeight | oval, pill | The height of the inner hole | | outerWidth | oval, pill | The width of the outer copper pad | | outerHeight | oval, pill | The height of the outer copper pad | | portHints | all | Array of port names that this hole connects to | | pcbX | all | X position of the hole center on the PCB | | pcbY | all | Y position of the hole center on the PCB | | name | all | Optional name identifier for the plated hole | --- title: --- ## Overview Silkscreen circles are often used to indicate "pin1" on a chip. ( ) `} /> --- title: description: >- The `` element creates a line on the silkscreen layer within a footprint. --- ## Overview The `` element creates a line on the silkscreen layer within a footprint. ( ) `} /> ## Properties | Property | Description | |----------|----------------------------------------------------| | `x1` | X coordinate of the starting point | | `y1` | Y coordinate of the starting point | | `x2` | X coordinate of the ending point | | `y2` | Y coordinate of the ending point | | `strokeWidth` | Stroke width of the line | Feel free to experiment with different coordinate values to see how the silkscreen line is rendered. --- title: description: >- The `` element is used to define a custom drawn path on the silkscreen layer. --- ## Overview The `` element is used to define a custom drawn path on the silkscreen layer. It supports the following properties: - route: an array of coordinate objects (each with x and y) that define the path. - strokeWidth: defines the width of the path's stroke. ( } pcbX={-15} /> ) `} /> ## Properties | Property | Type | Description | | ----------- | ------ | -------------------------------------------------------------------- | | route | Array | An array of objects containing x and y coordinates to define a path. | | strokeWidth | String | The width of the drawn path. | Feel free to experiment with different routes and strokeWidth values. --- title: --- ## Overview Silkscreen rectangles can be used to encapsulate a rectangular area around a chip ( ) `} /> --- title: description: >- The `` element is used to add text to the silkscreen layer within a PCB footprint. --- ## Overview The `` element is used to add text to the silkscreen layer within a PCB footprint. ( )`} /> ## Properties | Property | Type | Description | |-----------------|--------|---------------------------------------------------------------------------------------------------------------| | `text` | string | The text string to display. | | `anchorAlignment` | enum | Alignment of the text. One of "center", "top_left", "top_right", "bottom_left", "bottom_right". Defaults to "center". | | `font` | enum | Optional. The font type, e.g. `"tscircuit2024"`. | | `fontSize` | length | Optional. The size of the font. | --- title: Importing from Circuit JSON description: You can import Circuit JSON into tscircuit components. --- ## Overview You can import [Circuit JSON](https://github.com/tscircuit/circuit-json) into tscircuit components. Circuit JSON is normally an output of tscircuit code, but sometimes it can be a helpful intermediate format so is used to generate tscircuit code. ## via Web :::note TODO we're still writing this section! ::: ## via CLI :::note TODO we're still writing this section! ::: ## Programmatically Converting Circuit JSON to tscircuit code You can use the [circuit-json-to-tscircuit](https://github.com/tscircuit/circuit-json-to-tscircuit) module to programmatically convert circuit json into tscircuit code. --- title: Importing from JLCPCB sidebar_position: 2 description: JLCPCB has a massive component catalog of 3d models and footprints. --- import YouTubeEmbed from '../../../src/components/YouTubeEmbed'; ## Overview JLCPCB has a massive component catalog of 3d models and footprints. ## Web Import You can import JLCPCB components on [tscircuit.com](https://tscircuit.com). After importing the snippet, it'll be given a package name like `@tsci/YOUR_NAME.CHIP_NAME` and available for import from the tscircuit registry.

Step 1: Go to `tscircuit.com` and press the "new" button

You can find the JLCPCB Part Number on JLCPCB's website

An example of an imported JLCPCB component

After your component has been added to tscircuit, you can import it as a `@tsci/*` import like this: ```tsx import { ESP32_WROOM_32DC } from "@tsci/AnasSarkiz.ESP32_WROOM_32DC" export default () => ( ) ``` ## CLI Import To import JLCPCB components using the tsci dev environment, follow these steps: 1. Run `tsci dev` to start the development server 2. In the tsci dev environment, navigate to "File -> Import" After importing, you can use the component in your circuit like this: ```tsx import { ComponentName } from "@tsci/imported-component" export default () => ( ) ``` --- title: Importing from KiCad sidebar_position: 3 description: You can import KiCad components or projects into tscircuit. --- ## Overview You can import KiCad components or projects into tscircuit. :::tip If you're trying to use a footprint from KiCad's standard libraries, you can skip manual importing and reference it directly with the `kicad:` prefix (e.g. `kicad:Resistor_SMD/R_0402_1005Metric`). See [KiCad Footprints](/footprints/kicad-footprints) for more details. ::: To import from KiCad, you should understand the different file formats KiCad uses: - Files for KiCad components - `kicad_mod` - PCB footprint file for a single component - `kicad_sym` - Schematic symbol file for a single component - Files for KiCad projects - `kicad_pro` - KiCad project file - `kicad_pcb` - KiCad PCB board file - `kicad_sch` - KiCad Schematic board file :::info We're still building KiCad import directly into tscircuit.com, stay tuned for when that's available! ::: ## Importing KiCad Components Currently the easiest way to import KiCad components is to go to [kicad-component.tscircuit.com](https://kicad-component.tscircuit.com/) and upload your `kicad_mod` and/or `kicad_sym` file. ### Importing KiCad Components using the CLI Using tscircuit's [open-source KiCad component converter](https://github.com/tscircuit/kicad-component-converter), we can convert KiCad files on the command line. First install the component converter: ```bash npm install -g kicad-mod-converter ``` Next, run the following command to convert your KiCad files: ```bash # Convert a directory ./my-footprints.pretty to a tscircuit project kicad-mod-converter convert-kicad-directory --input-dir ./my-footprints.pretty --output-dir ./my-tscircuit-footprints ``` ### Importing KiCad Components Programmatically ```bash bun add kicad-mod-converter ``` ```tsx import { parseKicadModToCircuitJson } from "kicad-component-converter" import { readFileSync } from "node:fs" const fileContent = readFileSync("SW_SP3T_PCM13.kicad_mod") const circuitJson = await parseKicadModToCircuitJson(fileContent) /* [ * { * "type": "pcb_smtpad", * "x": 0.345, * ... */ ``` [Circuit JSON](https://github.com/tscircuit/circuit-json) can then be converted into regular tscircuit modules using [circuit-json-to-tscircuit](https://github.com/tscircuit/circuit-json-to-tscircuit) --- title: Connect GitHub Repositories to tscircuit --- You can connect your GitHub repositories to tscircuit to automatically publish updates, access instant previews and make sharing boards easier. You'll want to use the [command line tool](../../intro/quickstart-cli.md) to initialize an application and push to tscircuit.com using [`tsci push`](../../command-line/tsci-push.md) After that, navigate to the tscircuit.com page for your circuit and click "Connect to GitHub" button on the right side of the page. ![Connect to GitHub Button](/img/guides/connect-to-github/connect-to-github.png) After connecting to GitHub, every time you merge a small GitHub action will run to update the circuit on tscircuit.com. You ![Github Commit Status](/img/guides/connect-to-github/github-commit-status-success.png) --- title: Displaying Circuit JSON on a Webpage --- [Circuit JSON](https://github.com/tscircuit/circuit-json) is a universal intermediary format for representing an electronic circuit. It contains PCB, Schematic, 3D, Bill of Materials and simulation information. tscircuit code always converts into Circuit JSON, which can be displayed in any of our React components :::tip You can also upload your Circuit JSON to [circuitjson.com](https://circuitjson.com) for a quick preview! ::: ![Circuit JSON Pipeline](/img/circuit-json-explain.png) ## React: Display all available previews with `` The `` component is a simple way to display all available previews for a Circuit JSON array. You can use it by installing the `@tscircuit/runframe` package and importing it into your `React` project. ```tsx import { CircuitJsonPreview } from "@tscircuit/runframe" import { renderToCircuitJson } from "lib/dev/render-to-circuit-json" export default () => ( , )} /> ) ``` You should see something like this: ![RunFrame Preview](/img/runframe-example.png) For more examples and usage, check out the [runframe repo](https://github.com/tscircuit/runframe) and the [examples directory](https://github.com/tscircuit/runframe/tree/main/examples)! :::info Have tscircuit code and want to skip converting to Circuit JSON? Try using the `` component directly to build your circuit in the browser! ::: ### React: Running tscircuit code in the browser (no Circuit JSON needed!) The `` component is a simple way to run tscircuit code in the browser. RunFrame loads the tscircuit runtime (and all the dependencies to build Typescript code) into a WebWorker and runs the code in the background. To use RunFrame, you must provide a `fsMap` object. This object maps file paths to file contents. Files inside this "filesystem map" can import each other, this is super useful when you have many files to import such as a `manual-edits.json` file! ```tsx import { RunFrame } from "@tscircuit/runframe" export default () => ( ) `, }} entrypoint="main.tsx" /> ) ``` You can see different examples of how RunFrame looks for different circuits on the [RunFrame online examples page](https://runframe.vercel.app/) `` automatically handles imports from the tscircuit registry ## Displaying Circuit JSON without React Are you interested in this? Please [upvote this issue](https://github.com/tscircuit/tscircuit/issues/508) so we can prioritize it! --- title: Platform Configuration description: >- The Platform Configuration allows you to change tscircuit behavior to best suit the platform the tscircuit code is running on. --- ## Overview The Platform Configuration allows you to change tscircuit behavior to best suit the platform the tscircuit code is running on. Some use cases: - Organizations may want to customize the cloud autorouter to avoid sending sensitive designs outside your company - Organizations may want to introduce custom footprint strings using a prefix like `footprint="my-company:*"` - Organizations may want to use their own internal registry for importing circuits instead of [tscircuit.com](https://tscircuit.com) - For [autorouting.com](https://autorouting.com), we configure the platform to not perform any autorouting ## Customizing the Platform All of the following features of the platform can be configured: - **partsEngine** - The engine used to automatically find parts matching component specifications - **registryApiUrl** - The registry to use, defaults to `https://registry-api.tscircuit.com`. See [Registry API](../../web-apis/the-registry-api.md) for more details - **cloudAutorouterUrl** - The cloud autorouter to use, defaults to a tscircuit cloud service that uses freerouting - Disable specific circuit outputs to optimize build times, such as disabling autorouting - **footprintLibraryMap** - Configure custom prefixes for loading footprint strings from a server. This is how the `kicad:*` footprint strings are loaded! - **printBoardInformationToSilkscreen** - Print the board information to the silkscreen. This includes standard board and platform information like the board name, version etc. > See the full specification for the [tscircuit platform configuration](https://github.com/tscircuit/props/blob/main/lib/platformConfig.ts) ### The Default Platform The tscircuit default platform configuration sources parts from multiple vendors and uses the tscircuit backend for autorouting and `@tsci/*` imports. Current vendors used for automatic part sourcing: - [JLCPCB](https://jlcpcb.com) - Digikey (coming soon!) - Mouser (coming soon!) For each vendor, tscircuit populates multiple available chips. This means even if tscircuit finds parts for a vendor, you don't have to use that vendor! ## Using your Platform :::info Want more platform features? Tell us about your use case in [this GitHub Discussion!](https://github.com/orgs/tscircuit/discussions/514) ::: When you initialize a `RootCircuit`, you can provide the platform configuration as the `{ platform }` parameter: ```tsx import { RootCircuit } from "@tscircuit/core" const circuit = new RootCircuit({ platform: { registryApiUrl: "https://my-tscircuit-registry.mycompany.com", }, }) ``` This can also be provided to modules like `@tscircuit/eval` to evaluate tscircuit code: ```tsx import { CircuitRunner } from "@tscircuit/eval-webworker" import myPartsEngine from "./my-parts-engine" const circuitRunner = new CircuitRunner({ platform: { partsEngine: myPartsEngine, }, }) await circuitRunner.execute(` circuit.add( )`) await circuitRunner.renderUntilSettled() const circuitJson = await circuitRunner.getCircuitJson() ``` :::info Interested in running the entire tscircuit platform privately inside your company? We're happy to help! Reach out to **enterprise@tscircuit.com** ::: --- title: Programmatically Building Circuits --- This guide is about using tscircuit inside of scripts, APIs or inside the browser. Maybe you want to create a website that allows your users drag'n'drop to create custom electronics and turn their designs into real circuits automatically. For most users, there is no need to programmatically build circuits, you can use the [command line](../../command-line/tsci-dev.md) or the [online editor](../../intro/quickstart-web.md) to build and export your circuits into any supported format. If you're not using Typescript or prefer a "zero-installation" setup, you can fully build your circuits with complex parameters using the [Registry API](../../web-apis/the-registry-api.md) ## Using `@tscircuit/core` directly `@tscircuit/core` is the core library for tscircuit, it converts React code into [Circuit JSON](https://github.com/tscircuit/circuit-json), a universally intermediary format that represents an electronic device. Here's an example of how to use `@tscircuit/core` directly to build a circuit into Circuit JSON: ```tsx import { RootCircuit } from "@tscircuit/core" const circuit = new RootCircuit() circuit.add( ) await circuit.renderUntilSettled() console.log(circuit.getCircuitJson()) ``` This will output a long [Circuit JSON](https://github.com/tscircuit/circuit-json) array that you can convert into many other formats or display directly inside a [CircuitJsonPreview](./displaying-circuit-json-on-a-webpage.mdx) component. ## Evaluating Typescript Circuits `@tscircuit/eval` can be used to evaluate Typescript/React code and automatically import modules from the tscircuit registry. ```tsx import { CircuitRunner } from "@tscircuit/eval" const circuitRunner = new CircuitRunner() await circuitRunner.execute(` import { RedLed } from "@tsci/seveibar.red-led" circuit.add( )`) await circuitRunner.renderUntilSettled() const circuitJson = await circuitRunner.getCircuitJson() // Display or convert the circuit json to any other format! ``` ### Evaluating tscircuit inside a web worker ```tsx import { createCircuitWebWorker } from "@tscircuit/eval/webworker" const circuitWebWorker = createCircuitWebWorker() await circuitWebWorker.execute(` import { RedLed } from "@tsci/seveibar.red-led" circuit.add( ) `) await circuitWebWorker.renderUntilSettled() const circuitJson = await circuitWebWorker.getCircuitJson() ``` ## Converting Circuit JSON to other formats You can convert [Circuit JSON](https://github.com/tscircuit/circuit-json) to many other formats: - [Gerber files](https://github.com/tscircuit/circuit-json-to-gerber) - [Specctra DSN Autorouting files](https://github.com/tscircuit/dsn-converter) - [Pick'n'Place Files](https://github.com/tscircuit/circuit-json-to-pnp-csv) - [PCB and Schematic SVGs](https://github.com/tscircuit/circuit-to-svg) - [Bill of Materials](https://github.com/tscircuit/circuit-json-to-bom-csv) - [SPICE netlists and simulations](https://github.com/tscircuit/circuit-json-to-spice) --- title: Running tscircuit inside an iframe description: >- tscircuit can be evaluated inside an iframe. This makes it easy to embed snippets on a webpage without complex build systems. --- ## Overview tscircuit can be evaluated inside an iframe. This makes it easy to embed snippets on a webpage without complex build systems. Here's an example of an iframe running a tscircuit snippet: import { TscircuitIframe } from "../../../src/components/TscircuitIframe" )`, }} entrypoint="main.tsx" /> ## Running tscircuit inside an iframe To run tscircuit inside an iframe, perform the following steps: 1. Add an iframe that points to `"https://runframe.tscircuit.com/iframe.html"` 2. Listen for the `runframe_ready_to_receive` message from the iframe 3. Send the code you want to run to the iframe via `postMessage` Here's a fully working example: ```html RunFrame Host ``` ## React iframe wrapper for tscircuit An iframe wrapper is available to simplify the process of running tscircuit inside an iframe. To use it, add the `@tscircuit/runframe` package to your project and use the [`RunFrameWithIframe` component](https://github.com/tscircuit/runframe/blob/main/lib/components/RunFrameWithIframe/RunFrameWithIframe.tsx) like so: ```tsx import { RunFrameWithIframe } from "@tscircuit/runframe/iframe" export default () => ( )`, }} entrypoint="main.tsx" /> ) ``` --- title: Running tscircuit with a script tag description: Load `tscircuit`'s browser build from a CDN and render a circuit written inside a ` Here's a quick primer on how to use tscircuit: ## Core `` props (most-used) * `name`: reference designator (e.g., `"U1"`). * `footprint`: **string** (e.g., `"soic8"`/`"0402"`) **or** a `` element. * `pinLabels`: map pad → pin label (e.g., `{ pin1: "VCC", pin5: "GND" }`). * `schPinArrangement`: control schematic sides/order of pins (alias **`schPortArrangement`** is deprecated). Optional styling/box props: `schPinStyle`, `schPinSpacing`, `schWidth`, `schHeight`. ([GitHub][3]) * Connectivity helpers: `internallyConnectedPins`, `externallyConnectedPins`, and **`connections`** (auto‑traces by pin label) * Extras: `pcbPinLabels`, `cadModel`, `noSchematicRepresentation` --- ## Minimal chip ## Arrange pins on schematic (+ style/size) ## Custom PCB footprint (inline) } /> ## Internally / externally shorted pins ## Auto‑connect with `connections` A more condensed alternative to ``, available on basically all elements Use with `sel` for type‑safe selectors (e.g., `OUT: sel.U2(MyReg).VOUT`). ([GitHub][3], [docs.tscircuit.com][4]) ## Part selection & PCB labels ## All normal elements and important props Most elements have a `name` and `footprint` prop. Most properties are optional. - `` - root element - `` - group of elements - `` - any generic chip - `` - `resistance` - `` - `capacitance` - `` - `inductance` - `` - `color` - `` - `variant` (standard/schottky/zener/avalanche/photo/tvs) - `` - `from`, `to` - `` - `type` (npn/pnp/nmos/pmos) - `` - `channelType` (n/p), `mosfetMode` (enhancement/depletion) - `` - `diameter` - `` - `padShape` (circle/rect), `padDiameter`, `footprintVariant` (smd/through_hole), `width`, `height` - `` - `holeDiameter`, `outerDiameter` - `` - `spdt` (bool), `dpdt` (bool), `spst` (bool), `spdt` (bool), `isNormallyClosed` - `` - `pinCount`, `schFacingDirection` (left, up, right, down), `schPinArrangement`, `gender` (male/female/unpopulated), `showSilkscreenPinLabels`, `holeDiameter`, `connections`, `pinLabels`, `rightAngle`, `doubleRow` - `` - similar to pinheader but pin count must be 2 or 3 - `` - `` - `` - `shape` (rect), `width`, `height` - `` - `frequency`, `loadCapacitance`, `loadResistance` - `` - `capacity`, `voltage` - `` - `maxResistance`, `pinVariant` (two_pin/three_pin). Common footprint "pinrow2"/"pinrow3" ### Footprint Only Elements - `` - `portHints`, `pcbX`, `pcbY`, `shape`, `width`, `height` - `` - `pcbX`, `pcbY`, `shape`, `width`, `height` ## Common Footprints - "0402", "0603", "0805", "1206", "1210" - "dip", "dip8", "dip16", "axial", "soic8", "bga64", "tssop8", "stampboard", "stampreceiver", "hc49", "to92", "to220", "ssop", "qfp16", "qfn16", "sot23", "sot23_5", "sot223", "pinrow2", "pinrow6" - You can generally alter footprints by changing numbers or adding parameters e.g. "soic8_w4mm" creates a 4mm width soic, "pinrow8_p1mm" creates an 8 pin pinrow with 1mm pitch - For batteries, just use "pinrow2" ## Selector Syntax When specifying a selector, use "{component_name}.{pin_name}" or "net.{net_name}" These are common selectors: - "U1.VCC","R1.pin1","C1.pin2","C1.pos","U2.GND", "J1.SOME_PIN_LABEL" - Special case Net Selectors: "net.VCC","net.GND","net.GPIO1", "net.BAT_PLUS", "net.BAT_MINUS" Selectors are used in the `connections` prop and the `from` and `to` props of the `` element. - `` - `` ## Important Notes - Make sure you've connected both sides of every passives (resistor, capacitor, inductor) with a or a connections={{ pin1: ..., pin2: ... }} prop - Every normal element has a footprint prop ``` ## Example Prompt: ``` can you create a 555 timer circuit in tscircuit with a square wave output? ``` --- title: Quickstart CLI sidebar_position: 4 description: >- The command line is the best way to use tscircuit. Using the CLI, you can just run `tsci dev` in a project and see previews of your circuit just like any other local development tool! --- import YouTubeEmbed from '../../src/components/YouTubeEmbed'; ## Overview The command line is the best way to use tscircuit. Using the CLI, you can just run `tsci dev` in a project and see previews of your circuit just like any other local development tool! ## Install the tscircuit CLI You can install the tscircuit CLI by running `npm install -g @tscircuit/cli`. ## Create a new Project First, create a new tscircuit project by running `tsci init`. This will create a new directory with all the necessary files to get started: ![tsci init result](../../static/img/tsci-init.png) ## Run the Development Server Next, start the development server by running `tsci dev`. This will start a local server that automatically rebuilds your circuit when you make changes: ![tsci dev result](../../static/img/tsci-dev.png) Go to https://localhost:3020. You can now see PCB, Schematic and 3D views of your circuit, which update in real-time as you make changes to your code. ![browser](../../static/img/pcb-runframe.png) ### Using the CLI Offline To use the CLI offline, you need to disable the "Force Latest @tscircuit/eval" option in the file menu. Click on "File" in the top menu, then uncheck the "Force Latest @tscircuit/eval" option: ![Force eval option in file menu](../../static/img/force-eval.png) ## Pushing to the tscircuit Registry Next, you push your project by running `tsci push`. This will push your project to your registry. ![tsci push result](../../static/img/tsci-push.png) Go to your tscircuit account. You can now see PCB, Schematic and 3D views of your circuit in you registry. ![browser](../../static/img/registry-snippet.png) ## Exporting to SVGs, PDF, or Fabrication Files This section is coming soon! --- title: Quickstart Web sidebar_position: 3 --- You can use tscircuit online without installing anything on [tscircuit.com](https://tscircuit.com)! ## Using the Online Editor The [tscircuit online editor](https://tscircuit.com/editor) is a full Typescript editor with syntax highlighting, autocomplete, type-checking and tools for importing snippets and configuring chips. There are two types of projects you can create in the online editor. - **board**: a fully-functional electronic device that you can order - **module**: a reusable component, usually a specific chip or subcircuit, that you can use across many boards or to break up a complex board into smaller, more manageable pieces. To get started, let's create a simple board. You can use the "New" button on [tscircuit.com](https://tscircuit.com) and select "board" to open the editor with a blank board:

The editor will open with a template board that looks like this:

You can now edit the board by adding or removing elements! Check out the [essential elements guide](../guides/tscircuit-essentials/essential-elements.mdx) to learn more about the available elements. If you've already got an idea of what you want to build, try breaking down the problem into modules using our [designing electronics from scratch guide](../building-electronics/designing-electronics-from-scratch.md) After you make a change, click the "Run" button to see your changes applied. You can use the PCB, Schematic, and 3D views to make sure everything is correctly aligned. When you're ready to manufacture your board, click the "Download" button to download [fabrication files.](../guides/understanding-fabrication-files.md)

When you're ready to order your board, check out the [ordering prototypes guide](../building-electronics/ordering-prototypes.mdx). You can electronics fully assembled and ready to use from the many services that accept our standard fabrication files. ## Using the AI Assistant Our AI assistant is available in beta but is undergoing a big overhaul. We'll update this section when we're happy with it! --- title: What is tscircuit? slug: / sidebar_position: 1 --- import YouTubeEmbed from '../../src/components/YouTubeEmbed'; tscircuit is an open-source React/Typescript electronics toolchain and ecosystem for creating, previewing, simulating and manufacturing Printed Circuit Boards (PCBs). React and Typescript are standard tools that revolutionized the web development ecosystem. tscircuit combines the powerful static analysis of Typescript with the modular component system of React to make developing electronics faster, easier and more automated. To generate tscircuit with AI chat, check out our [AI context](../advanced/ai-context.mdx) Here's an example of a basic tscircuit electronic device, it's the USB flashlight that we make in [this tutorial](../tutorials/building-a-simple-usb-flashlight.mdx). { const USBCPort = useUsbC("USBC") const Button = usePushButton("SW1") return (