[Pierre] recently bought his first car and decided to make his own RFID electric starter for it! An Arduino Nano controls two relays which in turn can turn the car on, start it, and turn it off.

[Jason] really wanted to build an RFID controlled garage door opener ... Whenever a valid key is swiped, the Arduino triggers a relay which can then be used to control just about anything.

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 ...

This microcontroller is at the heart of countless impressive projects like RFID door locks ... three simple main components: An Arduino UNO board, a servo motor (with a sunflower paper decoration ...