If you're sick of using your boring old keys to unlock your door, Make has a guide for using and Arduino to power a lock that you can control with you ...

Using a little Arduino programming the fingerprint reader checks to see if you have access and if approved the Arduino Mega development board unlocks the door using a micro servomotor.

[Jason] really wanted to build an RFID controlled garage door opener and decided to turn to Arduino to get the job done. For someone who’s never worked with an Arduino before, he really seeme… ...

The servo motor is connected to the Arduino Uno and is programmed to rotate when it receives the signal from the script. This rotation moves a latch or bolt, effectively locking or unlocking the door.

This kit uses a CD-ROM drive and an Arduino board to build a clever robotic lock. This dude used a bolt to create the project and it's voice activated.

Perhaps you could create an Arduino device to lean on the door right before the Arduino device bolts the door. It's not clear if the lock unlocks the door when you close that incognito browser.

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made … ...