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Full Build Design for RFID E-Lock, uses PN532 Controller, Vehicle Battery, Teensy 3.2

Proclaiming “secure locks are always better than alarm systems or cameras,” Adafruit forums user Elmue set about to design and build an electronic door lock – and the results are amazing! With thorough build notes, source code, and datasheets provided, you can feel confident tackling this project whether you require the added security or want to issue ‘keys’ quickly in-house. The most interesting aspects of the build to me are the battery, designed to operate for ~4 days in the case of a power failure, and also the tips on calculating Rx for a door lock solenoid.

Mainboard

Circuit

ReadCard

Thanks again to Elmue for sending this in; view the entire project here on Code Project.


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