Hi all, just a quick question about grounding. I'm no electrician (Mechanical engineering student, really), so the topic of grounding has always been confusing to me.
I'm currently building a linear actuator and my electronics look a little bit like this:
Basically, I have a power supply connected to wall AC that powers two motor drivers. I know the motor driver ground needs to be connected to the power supply, but the drivers have another ground port. Does that need to be connected to the ground on the arduino? The arduino is powering two limit switches and two LED's with its 5V, so obviously those are grounded to the arduino.
I'm just unsure about all this grounding business. I know the power supply is grounded to the wall through the power cord, but the drivers confuse me. Anyone know what I should do with them?
PS. I'm using USB because I need to send serial information to and from the arduino.