Using "sel" References

The sel object is a special import that allows you to easily reference components with a bit more type-safety than a string. It can also be more ergonomic than typing out a port selector.

import { sel } from "tscircuit"

export default () => (
<board width="10mm" height="10mm">
  <resistor
    resistance="1k"
    footprint="0402"
    name="R1"
  />
  <capacitor
    capacitance="1000pF"
    footprint="0402"
    name="C1"
  />
  <trace from={sel.R1.pin1} to={sel.C1.pos} />
</board>
)

The sel can be thought of as a very large mapping of conventional strings.

Here are some sel expressions and their corresponding string:

import { sel } from "tscircuit"

sel.R1.pin1
// ".R1 > .pin1"

sel.C1.pos
// ".C1 > .pos"

sel.net.GND
// "net.GND"

sel.U1.GPIO1
// ".U1 > .GPIO1"

So sel is really just a slightly more type-safe, conventional way of writing port selectors. Where possible, it's much better to use component hooks because they can guarantee more type-safety and have the exact pins that a chip supports.