We’ve installed locks, tested them, and even picked them to arrive at the best recommendations. An electronic lock opens via a code entered into a keypad or touchscreen. It’s keyless ...

but keyless door locks can add a lot of exciting benefits for the modern household. Often starting with an electronic keypad lock as its base, a smart lock might use Bluetooth to grant you access ...

Opening the 30-year-old unit, he probed a row of screw terminals and identified a 13V supply, ground, and the connection to the buildings’ door lock. He connected the lock terminals to a relay ...

With the mechanical portion of the project out of the way, he spent a great deal of time working on the door’s electronic components, including the PIC-based controller and capacitive keypad.