I pull an RV with my truck and have since added a few cameras to help assist. I have a module that displays composite video on the factory Sync3 screen. It works great but I want a way to switch between multiple inputs.
I found a Ford Camera button that I can put into my dash that works as a momentary button and keep the factory look. My plan is to utilize this button to switch between the composite (yellow) RCA video feeds. There isn’t any audio (Red/White).
I tried using an Arduino Nano and 12v 4-channel relay but it seems the nano data pins don’t seem to output more then 5v and it wouldn’t switch the relays. The LED indicators on the board switch as expected though.
I wrote code so each time the momentary button is pressed it passes low signal to one input (on) and high signal to the other 3 (off) - each time it’s pressed it turns on one and the other three off in order and loops back around. The code seems to be working as expected.
Can someone help suggest which hardware would be best suited for this? I bought a 12v relay because the trucks native voltage is 12v. Should I be using a 5v relay instead? Is the nano the best board for the job or should I consider a different one?
Thanks in advance!