Posted in Arduino Hacks Tagged arduino, arduino pro mini, Electric Imp, imp, machine, mifare RC522, NFC, raspberry pi, Raspi, rfid, vending Finding An Active TX Pin On Cheap GPS January 30, 2015 ...

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 ...