Did you know that you can easily etch your own circuit board at home with just a few simple materials?
This is a companion discussion topic for the original entry at https://gurgleapps.com/learn/projects/diy-circuit-board-pico-piano-with-a-sharpie
This is a companion discussion topic for the original entry at https://gurgleapps.com/learn/projects/diy-circuit-board-pico-piano-with-a-sharpie