I've been building analog effects and designing PCBs and I have a big project I'd really like some guidance for.
The idea is five effects modules in one box with two buttons - bypass and select - so I can cycle through them. I've been breadboarding with a CD4017 decade counter and some 4066 switches, but I want to try a more elegant solution - so why not try Arduino and some relays?
I've had one for a while and failed at some simple things and the programming just never clicked for me like other electronics.
As for the project, the bypass part I have down. I already designed a bypass switch board with a preprogrammed uC from PedalSync. As for the cycling, I'm hoping to use an Ardunio to program my own solution. Problem is, just about everything on this forum is way over my head.
Anyway, here's my very crude breakdown of how I think it might work:
Input pin - Momentary (NO) switch to ground that needs denouncing.
Bypass Pin - This would fire first, activating an optofet to ground the signal during switching
5 relay pins - These would advance in sequence with each button press to power the individual relays and corresponding LEDs.
As a bonus - and I don't know if it's possible - have the uC remember which pin is active as power off.
Also, considering using a ULN2803 transistor array as a go-between for the uC and the relays.