Although [Paul] designed it with an Arduino Uno for easy testing and code modification, the Brewdoo has a custom PCB with a ‘328P. The code, Fritzing diagram and Eagle files are up at [Paul]’s ...

Prototyping is a personal affair ... footprints for microcontroller boards, an Arduino shield, a Raspberry Pi header, and much more. There will doubtless be ones that readers will spot as missing ...