This project uses an Arduino microcontroller and an RDM630 RFID receiver to control access to my garage. This is very handy when I need to get in with a handful of groceries. I carry an RFID card in my wallet that works just like the key chain FOB. Several spare FOBs have been given to family members who need access to the garage from time to time. I built a similar unit that cycles the deadbolt on a door leading from the garage into my house. When an authorized person wants to enter the garage they just wave their FOB or card across the antenna coil once which cycles a relay on and off one time. The relay is connected to the garage door manual operation button and behaves just like pushing the button one time. If the door is closed it opens, if the door is open it closes and if the door is in motion it stops. I added the 'SCAN HERE' label after I made the movie. It just looked too plain.