We recently came across this ingenious little device at our clients home — The Garage Butler is a device that will automatically close your garage door when you forget.
I am sure we all know people who have lost a bike or some other item in their garage the door was left open. Indeed it is not hard to inadvertently leave the garage door open.
This patented device attaches to any garage door mechanism that has a working opener/closer button and will not interfere with the opener’s normal operation, nor will it interfere with any infrared safety circuit.
Basically you can set it so that the garage door will close after a time delay of 3-10-20-30-45 or 60 minutes. For more info check it out at http://www.garagebutler.com/