0415 GUITAR SYNTH
This is a simple but fun pedal that transforms the signal into a square wave, up to four octaves apart: one or two octaves up can be mixed with one or two octaves down for super synthy sounds.
What makes this special is that the octave up part is based on a frequency controlled oscillator so it doesn't scramble chords like usual octave circuit (it's still monophonic however) and it tracks well over the entire fretboard. Compared to the Arcadiator it sounds less like a fuzz and more like a pure synth. It can be very controlled, but also make superglitchy sounds. In the demo below I used a guitar.
Stripboard layout (verified)
Mix - blends between octave up and octave down
Vol - output volume
OctUp switch - toggles between one or two octaves up
OctDown switch - toggles between one or two octaves down