","Download RFID RC522 MFRC522 Arduino Library","","https://www.arduinolibraries.info/libraries/mfrc522","![RFID-RC522](https://3.bp.blogspot.com/-LIRYnr98scs ...

Radio Frequency Identification is widely used in contactless payment cards, National Highway Tollgate systems, and in security passes. By integrating an RFID reader with an Arduino, you will be able ...

A Lock Box that uses RFID, an SD card, and an Arduino to open and close the box and log who and when someone opens it.

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 ...