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Old Lock Retrofitted for Wireless and Key-free Entry

What do you do if the old key your landlord gave you is poor fit for your apartment’s lock? If you’re the geeky sort, you build a wireless unlocking module to do the work for you.

Instructables user Rybitski writes:

The key to my apartment never worked quite right because it is a copy of a copy of a copy. I am fairly certain that the dead bolt is original to the building and the property manager seems to have lost the original key years ago. As a result unlocking the door was always a pain. Changing the lock wasn’t an option, but eliminating the need to use a key was.

To that end, he built the device seen in the video above. An Arduino Uno drives a servo which in turn opens the deadbolt. The whole thing is controlled by a simple wireless key fob. Hit up the link below for the full build guide including code.

Key Fob Deadbolt [via Hack A Day]

Jason Fitzpatrick is warranty-voiding DIYer and all around geek. When he's not documenting mods and hacks he's doing his best to make sure a generation of college students graduate knowing they should put their pants on one leg at a time and go on to greatness, just like Bruce Dickinson. You can follow him on if you'd like.

  • Published 11/13/12

Comments (5)

  1. Ramon

    That’s pretty slick.

  2. paul

    I second that, it is pretty slick. I don’t think the wife would go for it looking like that but I am sure I could build a housing, that would look more aesthetically pleasing.

  3. John B.

    There is no mechanical emergency egress override for this. It’s required by -all- building codes in the US. Please consider that when building this project. You don’t want to get stuck inside in the event of a power failure, a mechanism failure, or fire.

  4. trm96

    Added side benefit is that the landlord can no longer gain access to your apartment whenever he/she wants…

  5. A.D.Wheeler

    That is pretty slick, but a quick shot of lithium grease into the keyhole and your problem would have been solved.

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