Build Your Own Clone Message Board

Hi
This is probably obvious to most of you.
I often add switches to pedals (dark/bright ...) and I never thought of using a 2 colour led until I saw one myself.

What are the do's and dont's? What kind of LED do you use for this?
It seems pretty simple, but maybe there are unwanted side-effects?
Can someone point me in the right direction?

Thanks!
tom

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I don't know of any particular do's & don'ts, but these bi-color LED's are readily available and quite simple to use. Basically, they just use two different colored cathodes and a common anode, so you just wire the cathodes to separate throws of a double-throw switch. AAMOF, I just recently bought a GuitarPCB board that was set up for this. I didn't end up using it and just wired in a regular LED, but the idea was to have the bi-color LED indicate that power was connected and the effect was bypassed with one color and that the effect circuit was engaged with the other color. In this application, the LED switching was done through the footswitch. The now-discontinued BYOC Tri-Boost (instructions with schematic HERE) used a tri-color LED to indicate which of the three boost circuits was active, and used one pole and three throws of a 3P4T rotary switch.

Some bi-color LED sources:

https://www.digikey.com/catalog/en/part ... amps/34242

https://www.mouser.com/Optoelectronics/ ... olor&No=75

https://www.mammothelectronics.com/collections/5mm-leds

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Thanks a lot !

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