Piezo Chez Oscillator w Overdrive and Fuzz

thingiverse

This is a DIY oscillator for use in a budget-friendly and rugged modular synthesizer, Piezo Chez. It produces triangle, saw wave, or pulse wave, depending on the level of overdrive/fuzz applied. Properly designed oscillators require intricate circuits, but this one is a punk electronics hack. Forget about dual power supplies, temperature compensation, and exponential current generation; it's powered by a single 4069UB IC with six logic inverters used as analog amplifiers, driven by a 9V battery with DC-coupled output reaching 9V peak-to-peak. Do not connect directly to expensive equipment. I was inspired by Elliot Williams' Hackaday post and the works of Nicolas Collins: Handmade Electronic Music, as well as Lunettas on electro-music.com. The idea is likely as old as the CMOS 4000-series. The project consists of four parts: * Front panel * Box * Battery clip (two used) * PCB (circuit board) that can be printed, etched, milled, or breadboarded.