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

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 ...

[Matt] has mixed up a batch of two RFID reading door lock systems. While the “door lock” part of the setup has yet to come into existence, the “RFID reading” section is up and running. By ...

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.

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.