On 9/28/2015 3:07 PM, wrote:

I plan to install a momentary switch in one of the empty "knockouts" in
the car dash wired to the opener's xmtr with the "receiver" connected
to a light to illuminate the driveway. So, when backing into the
garage, at night, we'll be able to *see* the driveway (instead of
relying on the feeble backup lights on the car)

It is more complicated than that on the one I have. There is a slotted
wheel optical emitter that monitors motor movement and shuts it down
if it is not seeing pulses at the expected rate.

It is easier to just buy a separate GDO receiver. I got one on Ebay
for $10 or so, to use as the portable "next" button on my tiki bar MP3
player.

http://gfretwell.com/ftp/next%20button.jpg

That picks a relay and makes the appropriate key on the keyboard card
that runs this

http://gfretwell.com/ftp/judybar.jpg

The whole thing runs on a PC using MPXPLAY a DOS application in DOXBOX
a W/XP application.

For your application, why not just add more lights to the light in the
opener?

Don't want lights going on just because the door is opened.
Consider daylight. Also, want to be able to light up the
driveway when the door is NOT being opened.

I figure I can add a switch in a dashboard knockout in the one car
with the old "remote" unit, program one of the extra "HomeLink" remote
buttons in the other car and wire a pushbutton to the "manual
open" contacts for a "wall switch" just inside the garage door.

My wife wants me to install "chase lights" in her dad's driveway
hooked to his opener.

I want to build a Cylon visor (that's actually functional as sunglasses)
along the same lines! Would be wicked cool at night!