Circuit schematic and Arduino Sketch (source code) are provided here. The reader transmits radio frequency when powered ON. When the tag is placed near the reader, the RFID tag will receive ... as ...

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...

[Pierre] recently bought his first car and decided to make his own RFID electric starter for it! An Arduino Nano controls ... goal is to relocate this circuit closer to the wheel and use an ...

[Jason] really wanted to build an RFID controlled garage door opener and decided to turn to Arduino to get the job ... user to select how long the relay circuit should remain open.