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Archive for April, 2013


Keypad Security Door Lock

I just finished my Keypad Security Lock project a week or so ago, which I’ve been working on and off with a break in the middle for the past few weeks now. Held together with sticky pads and hookup wire, I present my latest creation:

(excuse the shoddy camera angles, it’s tricky to hold the camera and type when the keypad is on the other side of the door!)

ATmega 328P
Strip board
ABS housing
Full rotation servo (why did I get a full rotation one…)
Reed switch and magnet pair (to accommodate for the decision above)
3×4 matrixed keypad
240v -> 0.7A 5v mains transformer
ribbon cable, hookup wire, resistors, etc.

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