The Bitbreaker Deluxe is an 8-bit sounding square wave fuzz with 5 different octave down modes, in a small 1590A enclosure. It even has a fitting built-in tune that plays at power-up... :)
After I had designed the "8-Bitar" single chip octave down, I wanted to see if I could make something similar using only a single microcontroller chip with even less components while having more functions...
I decided to try using an Attinty85 because of the low footprint (only 8-pins) and DIP format. It took alot of time, because I had very little prior programming experience and the Attiny85 is a bit tricky to use and debug since it doesn't have a serial monitor, but finally I managed to make it work. Here's the result - The Bitbreaker Deluxe.
Since I've spent a ton of hours on this pedal, and since it uses a mictrocontroller, I decided to not offer this pedal as a DIY project for now.