There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects ... button presses, decode them, and send them via UART or I²C to an Arduino.

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 ...

Instead, how about a door that locks itself? That’s exactly what Mike, CEO of the Useless Duck Company, has made. He has fashioned an Arduino-powered door bolt that locks itself whenever you ...

Brocious found some very evident flaws in the locks security and did so with about $50 worth of easy-to-obtain materials. He used 1 Arduino Mega 128; 1 DC barrel jack, 5-mm outer diameter, 2.1-mm ...

May be interested in a new smart Arduino lock project which uses voice recognition for access privileges. Created by Jithin Sanal the project has been published to the Hackster.io website and ...

and to program the lock with a the hotel's "sitecode" -- a 32-bit key that identifies the hotel. By plugging an Arduino microcontroller into the DC socket, Brocious found that he could simply read ...

So he grabbed a library for Arduino and got to work ... So began his journey to filter, process, and decode the DCF77 protocol. That link goes to the project overview. It will be in several ...