Quote Originally Posted by brutal View Post
That should fit the bill. Radio Shack also used to sell a cheap IR beam break door alarm system - they're all over Amazon now (as was posted elsewhere.)

I installed one of these, and a remote light switch as well that sends alerts to my phone if the door is open for longer than x minutes.

http://www.amazon.com/Chamberlain-CI...hamberlain+myq

They also make models for older doors, and even have a setup that can be retrofitted to even older non-compatible stuff to remotely sense if the door is open or closed.

That is just about one of the most awesome things I have ever seen (mind you I don't get crazy on too much technology, the wife programs all the remotes).

The plus side is that I have a brand new house and brand new garage door opener....wait for it....made by chamberlain (I really am excited by the text alert thing).