
Nodcah made this Instructables detailing the build of his DIY fingerprint scanning garage door opener:
As a person without a car, I don’t need to carry keys around everywhere I go. Because of this, I’ve been locked out of my own house several times. It’s a pain to wait for someone with a key, so I thought I would do something about it.
This project is my way of solving this problem, while getting the chance to interface with an awesome fingerprint scanner (aka: FPS).
Also, this module isn’t restricted to just garage doors, for you can create different kinds of simple motorized locks to suit your needs.

only the display and the scanner should be on the outside
It is! There is an ATtiny85 on the inside controlling the actual garage. The outside module sends a signal into the garage that triggers the garage door to open. =)
i got lockedout of my room yesterday…i need something like this