Just saw this in my feed on YT and though a few people here might be interested. Guessing that a few people tinker in electronics, etc.
No I have not built one, trying to think of a need for myself.
Another one built on an Arduino that has lots of nice detail and seems pretty simple if you just need a control panel without all the flash:
https://www.s-config.com/arduinodeck/
I may build this Arduinodeck if we really get going with our little OBS based studio.
Also seems like there is a Raspberry Pi based system, but it’s a little harder to understand, including for completeness. https://stream-pi.com/