This shield allows your Arduino to control a door lock using an electric strike plate and one of a number of commonly-available RFID modules, and is based on the circuit described in the "RFID Access Control System" project in the book "Practical Arduino".
Arduino NFC/RFID Shield
This product has been retired. It has been replaced by the DLOCK Door Lock Shield: www.freetronics.com/dlock
We've taken our popular Adafruit PN532 breakout board and turned it into a shield - the perfect tool for any 13.