i am trying to automate my chicken coop so if I'm not home the door will open and close on its own. It will be a 12v system. I have a linear actuator to operate the door. It has 2 wires and you reverse the polarity to change direction. I also have 2 timers to send power to the actuator at open and close times. What else do I need to have to wire it and how should I wire the circuit so I don't fry anything? Do I need a DPDT relay? Thanks for the help. I'm new and stumped.