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Hack A Day
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Adding a keypad to a key card lock
Posted: October 9th, 2009, 9:00am MDT by Phil Burgess
[Colin Merkel] had a little problem: he was continually forgetting his electronic key card, locking himself out of his own dorm room. Like any normal Hack a Day reader, rather than getting in the habit of always carrying his card, the natural impulse of course is to build this elaborate rig of electronics and duct tape. Right? The result [...]