How-To Geek

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 a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). 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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