[RFID-RC522] (https://3.bp.blogspot.com/-LIRYnr98scs/WxPHATmSfdI/AAAAAAABIlA/UzwXyHHkqCQpFBX0bW4NZXvnm_ARMAEDQCPcBGAYYCw/s1600/arduino-rfid-rc522-esquema.png)",""," [!

Arduino library for MFRC522 and other RFID RC522 based modules. Read and write different types of Radio-Frequency IDentification (RFID) cards on your Arduino using a RC522 based reader connected via ...

The MFRC522 requires a regulated 3.3v power supply, which is provided on the board, so that you don’t have to worry about it! – MFRC522 connection header: This is where the MFRC522 RFID reader ...

Therefore, an effort was made to design a tool for “identification of impedance changes in metals using an Arduino Uno-based RFID RC522” which is relatively inexpensive and easy to carry.

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.