[115] Bicolor LED in a Stompbox (again)

Date: July 26th, 2008 | Comments : [5] | Categories: DIY.

Bicolor LED in a guitar pedal

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.


5 Responses to “Bicolor LED in a Stompbox (again)”

[784] Steve Reel Says: 8:54 am, September 4th, 2009

Thanks for this, I need something like this on an amp channel switcher I’m working on.

[1529] Nolan Says: 9:11 pm, November 14th, 2010

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?

[1530] admin Says: 10:03 am, November 15th, 2010

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.

[3155] Casar Says: 4:08 pm, September 17th, 2012

Is the common cathode connected directly to the ground? I am new to this so sorry if this is too much a newbie question. Can you expand upon the wiring of the -V and the rest of the circuit beyond the switch and bulb in a stomp box?

[3159] admin Says: 9:08 am, September 18th, 2012

The common cathode is connected directly to ground.



AMZ Home Page

Guitar FX PCBs