If you are looking to build a simple RFID-based security ... the Pi triggers the door lock using a signal line originally designed to work with an intercom system. If the user isn’t on the ...

The support structure mounts underneath the escutcheon plate for the lockset, keeping the main acrylic sheet flat against the door. An RFID reader and Arduino run the system, with a button inside ...

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 ...