Here is a simple project I recently completed.  I needed a footswitch controller for my Peavey Studio Pro 110 amplifier.  It’s a very nice amplifier for small apartment use and I bought it used for a very decent price – the price was low partly because it was missing the footswitch controller. The actual controller is quite simple inside, being composed of two switches and two LEDs connected to a 1/4″ stereo audio cable...