This project demonstrates how to use an RFID RC522 module with an Arduino to authenticate RFID cards. The system turns on a green LED if an authorized RFID card is scanned and turns on a red LED and ...

🔐 RFID-Based Access Control System A simple, Arduino Uno–based RFID access control prototype that reads an RFID tag (using the MFRC522/RFID-RC522 module), displays tag UID on a 16×2 LCD, and grants ...

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.