Using Arduino to repair Commodore 64 boards | Build Your Own Oscilloscope

If You do not have an Oscilloscope and want to see how signals look like on Commodore 64 board, Arduino boards can help us with that... Arduino is not a replacement for an Oscilloscope but something that fits between a logic probe and an Oscilloscope.

https://github.com/josipk/Commodore64/tree/main/Arduino-Oscilloscope