Dheera Venkatraman, a crafty MIT student, has just completed the latest iteration in a series of upgrades to his dorm room door lock. Now because MIT's administration doesn't like it if you hack the door locks or the strike plates, Dheera needed an innovative way to enter his own room without using a key. He's gone through a series of various door-opening mechanisms over the last couple of years -- our favorite one required scanning a barcode on a box of EZ Mac to gain entry -- but he's finally settled on the simplest design, a computer-less setup that involves a microcontroller, a motor, and a PS/2 (waterproof) keyboard. (He's got a much more technical explanation, including a circuit diagram and drivers on his website, in case your SO / parents / kids also have rules about messing with your house). We're now taking bets on how long it takes his MIT classmates to crack his password.[Via MAKE: Blog