Alan Parekh writes:
Instead of using keys and codes for security this device that Ankur Thakkar, Darshan Shah and Saisrinivasan Mohankumar built as part of their ece4760 Final Project uses gestures to grant access. The system uses IR sensors to determine the movement of a persons hand within the detection area, after you train the unlock pattern you can simply repeat the pattern to activate the device. I think a small miniature version of this that can detect a finger instead of a full hand would be a great replacement of a typical keypad and would probably be able to retain a similar form factor. Nice thing about this technology is that it is contact free, these days no one likes touching things like keypads that thousands of others have potentially used before them.
Via Hacked Gadgets.