I was going to turn one of the Pis I have into a wireless remote for my garage door following some tutorials online (first ever use with GPIO).
It all seems fairly basic on the backend stuff but I wanted to know what the repercussions would be in my situation:
I have 4 terminals on my garage door motor:
1. Wall switch 1
2. Wall switch 2
I was going to get a DC converter to go from 24V to 5V for the Pi, but then started getting confused because the terminal is only +ve 24V and there's no -ve terminal.
What would happen if I plugged it into the DC converter without the negative half? Would I fry the Pi, or would it not be complete and just not work?