A few days ago I saw a sewing machine pedal in a charity shop, and wondered if I could turn it into a guitar effects pedal. Through a bit of re-wiring and few lines of Processing, it turns out you can. The hardest bit was getting the pedal apart!
The pedal is basically a spring loaded potentiometer, so I wired it to send the values, through an Arduino to a Processing App, and from there, to the virtual guitar effects software – Guitar Rig.
It’s not a bad start, but it might take me a while to make a full copy of one of these –