Can someone check my plan for digital inputs (V3 brain)
i've taken a look at the Digital Input FAQ and i believe i'm ready to tackle what i'm trying to do. I just want to confirm before frying my FB. My goal is to connect my rear backup camera's power to my reverse light's 12v. Then i'm going to take a step-down 12-5v voltage converter and connect the reverse lights 12v to the FB digital input. Doing this will allow me to detect when the cars in reverse and send a command to my front end to automatically switch to the camera screen.
As i understand it my plan will work provided i use one of these to keep the input pin grounded until 5v is sent to it from the voltage converter, but does the 5v pin require constant 5v? I guess i dont get why i have to send 5v down the input pin and the 5v pin.