A hackerspace is a place that generally needs to be accessed by a wide group of people, often at weird and unusual hours. Handing around keys and making sure everything is properly locked up can be ...

Sick of using those old keys to get into your house? Redditor charmonkie shows off a homemade, keypad-powered deadbolt without actually modifying the door on his apartment. The setup includes a ...

A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...