If you have a bicolor LED that has 3 pins, the cathodes of the two LEDs are connected together internally and available as a common connection (middle pin). The other two legs of the LED are the anodes of the internal diodes.
The 3PDT footswitch is wired so that power is alternately applied to one of the anodes to light up the respective LED. A single current limiting resistor is used to set brightness and is shown as 10k ohms. Reduce the value to 4.7k or even 2.2k to make the indicator LEDs brighter.
Thanks for this, I need something like this on an amp channel switcher I’m working on.
What would happen if I wired a bi-color LED into a stompbox I’m building?
Like, would color 1 be on all the time, then switch to color 2 when the pedal is engaged, or would color 1 and 2 alternate each time I engage the pedal?
This is a drawing for use in a stompbox.
In one switch position, red is on and green is off.
Stomp the switch, and red is off and green is on. They alternate being on.