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Jason Hamilton has built this Arduino-based RFID access control to open his garage door using RFID. The project has a master RFID key hard-coded into the Arduino firmware, which allows you to add other keys to the system. The new keys are all stored into the EEPROM memory of Arduino.
Arduino based RFID access control for doors
RFID is a technology that uses radio waves for transmitting the identity (unique serial number) of an object or a person. If you have an electronic key to access your office building, it probably uses the same technology. An RFID system has a reader and a transponder (also called tag). The reader transmits electromagnectic waves in its surrounding through an antenna system, and when a tag passes passes through the zone, it is activated and the reader can read the identification data stored inside the electronic tag. Read more
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