[MikeTheGreat]

Thank you for sharing the [2] link - I think that's what I'm looking for. I read through the 'big' ideas (like how the keypress matrix works, etc) but I wasn't clear on why there's like 3-6 other ICs / components in the ErgoDox too - stuff like "Why is this resistor here?".

I was thinking of trying to make a keyboard that used a much cheaper CPU (like one of those $1-2 ones from China, or the Pico Pi) and realized that if I swap out that out that I'd have no idea where to put resistors, or why :)

I'm definitely going to look through your stuff too - a 3 key keyboard might be a much easier way to start, actually :)