protopedal v1.0

The protopedal is a rudimentary digital guitar effects processor for open source development and experimentation with guitar pedal effects. For accesibility purposes, it is designed to work as a shield for the NUCLEO F767-ZI devboard from ST Microelectronics. The firmware is written in Rust using the embassy embedded framework. It provides all the needed analog circuitry so it is a pretty plug and play coding experience.

System Architecture

The pedal has a single analog guitar 1 megaohm impedance input stage. It is based around the OPA2134 operational amplifer from TI