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 ...

By connecting multiple MFRC522 RFID readers to an Arduino Uno, she’s come up with a method of triggering a device (like an electronic door lock) only when the appropriate combination of RFID ...

You can connect your Arduino to the FTDI lines for quick programming, or you can remove the on-board ATMEGA328-PU chip and insert it into your Arduino UNO directly as another method of quick ...