[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 ...

Learn to build an RFID based attendance system using Arduino with step-by-step instructions, circuit diagrams, and complete code. This $35 DIY project replaces expensive commercial systems with ...

An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off. Instead of adding a button for “push to start” he opted for a 13.56MHz RFID module.

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.