I currently have my garage door opener hard wired into my motorcycle's high beam switch. The nice thing about this set up is that the remote is hidden in the frame of the bike, it can not be easily stolen, forgotten or lost; and it can not be triggered unless the key is in the ignition. And I never have to change the battery.
My current configuration is as such.
1. solder a jumper across the button on the remote so that it is always in the on position.
2. Connect wires to the battery terminals on the remote. negative to ground, and positive spliced into the high beam positive source.
Any time my high beams are on, the remote is transmiting. The plan is to add a timer or toggle circuit of some sort such that when the high beam is toggled on, it momentaraly sends voltage to the 12 volt garage door opener and then shuts offf until the next time the high beam is toggled off and on. It was fairly simple to hard wire it such that any time the high beam is on the opener is transmiting, but I don't want the remote transmiting non stop just because I have my high beams on for safety.
I've seen black box devices on the web that do what I'm looking for, but I'd like to know how to build the circuit myself.
Any suggestions?