Locksmiths Both Feared and Admired Elmer

After locking the door and leaving the keys inside one too many times, Elmer hit upon an entry strategy that involves no keys or codes to remember. He simply attached a timer to his door-bell, and a timer relay to the key switch terminals on the opener for the door on his attached garage. The doorbell operates normally, except when it is pushed continuously for 12-15 seconds, which automatically opens the garage door. Of course, if neighbors or friends find out, you're no longer secure!

For PDF links to Elmer Jones' instructions and drawings:

Schematic drawing of door bell activated delay garage door opener

Circuit board drawing

Doorbell timer drawing