After one too many nights lying awake wondering if he had remembered to close the garage door, Bryan decided to reengineer his automatic door opener. He attached a detector switch to the opener drive rail, which is engaged by the drive shuttle as the door arrives at the fully open position. He wired the switch to a delay timer that begins its count when the switch is closed. When the timing period clocks out, the timer's normally open dry contacts signal the opener to close the door.
|Hands-free Garage Door Closer Parts List|
|Amt||Part Description||Allied Part #|
|1||Delay-on make timer relay 120V ac||419-0053|
|1||Octal relay socket||814-3100|
|1||Unidirectional hinge roller switch||821-0039|
|1||6-32 aluminum male-female stand-offs||920-6098|
|2||Conductor 120V ac power vord||626-4699|
Additional parts required: Delay-on make timer relay 24V dc; 24V dc power supply; crimp terminals; small lengths of two conductor wire.
Click here for Bryan Henderson's complete instructions on how to build your own hands-free garage door closer.