RC Charging Circuit Example

Here's an example of an RC circuit that forms a voltage divider with a capacitor. This also functions as a low-pass filter. Since no spiceEngine is specified in <analogsimulation />, it uses the default spicey engine. Voltage probes are placed at the input and output to observe the charging behavior.

export default () => (
    <board width={16} height={16} schMaxTraceDistance={5}>
      <voltagesource
        name="V1"
        voltage="5V"
        schX={-4}
        schY={1}
        schRotation={270}
      />
      <resistor
        name="R1"
        resistance="1k"
        footprint="0402"
        schX={-1}
        schY={4}
        pcbX={4}
        pcbY={4}
      />
      <resistor
        name="R2"
        resistance="2k"
        footprint="0402"
        schX={3}
        schY={3}
        schRotation={270}
        pcbX={-4}
        pcbY={-4}
      />
      <capacitor
        name="C1"
        capacitance="10uF"
        footprint="0402"
        schX={2}
        schY={1.5}
        pcbX={0}
        pcbY={-2}
      />

      <trace from={".V1 > .pin1"} to={".R1 > .pin1"} />
      <trace from={".R1 > .pin2"} to={".R2 > .pin1"} />
      <trace from={".R1 > .pin2"} to={".C1 > .pin1"} />
      <trace from={".V1 > .pin2"} to={"net.GND"} />
      <trace from={".R2 > .pin2"} to={"net.GND"} />
      <trace from={".C1 > .pin2"} to={"net.GND"} />

      <voltageprobe connectsTo={".R1 > .pin1"} />
      <voltageprobe connectsTo={".R1 > .pin2"} />

      <analogsimulation duration={100} timePerStep={1} />
    </board>
)

The simulation results will show the voltage at the junction of R1, R2, and C1 charging towards the Thevenin equivalent voltage of the R1-R2 divider.