I’ve re-layed the circuit for the midi-pedal project onto this useful board from Ooomlout which handily holds an Arduino board and a breadboard. The circuit is basically the same but tidied up and with the addition of a volume pot. I’m just debugging the code at the moment and will post that when its done.

The flying white lead at the top is the test contact lead instead of having to wire in the whole of the pedal board.