I am looking some design help for a basic relay circuit to control a projector lift I am building. I need it to react to a 12V trigger from the projector. I am stuck on this problem. I have found a remote relay baord that I can do it from an IR signal, but I prefer to use the projector trigger, as I feel it would be more reliable in the long run, and possiblly even easier to build.

If any of you have a schematic that expalains the relays and configuration needed it would be appriciated. I would also buy the board with relays if someone has them made already.

Simple start the motor and the projector on power up, stop when lowered by limit switch, the reverse polarity and raise on projector shut down and stop when raise by limit switch.

Thanks

Mike