can garage door remote run on 12 volt battery

sure - you just need to transform the voltage down ... the button's probably only running on about 3v .. but you need to open it up and find out the batteries it requires..... that gives you the voltage ... then you just need a 12v to (?)v transformer circuit.

steve

 

Figure out the voltage as in the previous post and then use a suitable voltage regulator ie. LM78xx or the lower current 78Mxx, where 78=positive reg; xx is the output voltage that you need. Thus a LM7809=9 volt positive reg
See http://www.fairchildsemi.com/ds/LM/LM7809.pdf
Later, Gil.

 

I did this in mine. It was easy, since my Genie transmitter was already 12 volts now some of the older remote had a small 12 volt battery. I soldered the micro switch to be always pressed, removed the battery, then connected the bike high beam wire to one side of the battery connector, and ground to the other. Then, whenever I press the high beam switch, it sends 12 volts to the transmitter, which transmits, since the switch is soldered closed (Pressed). I encased it all in 2 plastic ziplocs, and has been working for years.