I'm currently building an auto chicken coop door and have very little experience in low voltage design. I have a GE 15132 digital timer (dpdt) that I plan to use to power the set up. I have a 120v AC line to the shed in using and plan to use this motor to open a window I use as chicken door. I need to know some ideas to transform to 12v to kick a relay to reverse motor and stop it at limit switches.