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 ...

The card reader can be used two further enhance both Arduino and Raspberry Pi projects and is now available from just C$21 or roughly £13 with worldwide delivery expected to take place during ...

Each programmed card has an allocated 5v/TTL compatible output and an Indicator LED. There is a latching mode, and a momentary mode. This unit can program 6x RFID cards in less than 30 seconds!

These readers are not 5v tolerant. This project shows the readers being powered by the 3.3v pin, however the SPI pins on an UNO (and pretty much any 5v microcontroller for that matter) also run on 5v.

[Jason] really wanted to build an RFID controlled garage door opener and decided to turn to Arduino to get the job done. For someone who’s never worked with an Arduino before, he really seeme… ...

Instructables user talk2bruce created the Arduino Internet Gizmo, a card reader that takes you to your favorite websites with a touch of an RFID tag.

If you can dream it, Arduino can help you build it -- perhaps with a dash of MakerBot thrown in for good measure. The latest homebrew project to hit the ol' inbox sounds an alarm whenever you ...