Arduino enthusiasts looking for a new project to complete over the weekend might be interested in this Arduino door lock which is automatically activated as soon as you enter incognito browsing ...

He has fashioned an Arduino-powered door bolt that locks itself whenever you open an incognito browser window. Always nice when a computer gives you a helping hand.

Build your own IoT smart door lock system using a Nano ESP32 and the Arduino Cloud, courtesy of this Gadget Master.

Perhaps you could create an Arduino device to lean on the door right before the Arduino device bolts the door. It's not clear if the lock unlocks the door when you close that incognito browser.

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 system was designed for a garage door. The bistable relay serves to disable the communication between the sensor and the Arduino in case there are more than 3 false scanner fingerprints, or ...

This proves that you have access to the secret, and can only be used once. To secure his Lego mini-figures, [Luca] built an authentication system using Google Authenticator and Arduino.