Why use old fashioned keys when you can use newfangled electronic keys? If you are looking to build a simple RFID ... door lock using a signal line originally designed to work with an intercom system.

He’s constructed an Arduino keypad door lock — without using ... setup is held up rather artistically using good old duct tape. The system auto-locks after 5 seconds, and just in case ...

This microcontroller is at the heart of countless impressive projects like RFID door locks, automated plant watering systems ...