how to reverse the polarity of a DC motor using a DPDT relay, limit switch, and timer?
Ok, i am not an electrician and understand very little, but here's what i want to do. I have a reversable 18V cordless drill I have taken apart to get at just the motor. What I want it to do is turn on automaticallly with a timer in one direction and shut off (with a limit switch?) after about 2 seconds. About 14 hours later I need the opposite action. Both actions automatic using a timer with AC power. The application is a door opening and closing veritcally (chicken coop door).