Alarm Lock Systems, Inc., a leader in single point access control has introduced three unique keypads. Each keypad controls access of a single entry point with up to 150 user codes. Alarm Lock's ...

Self-contained stainless steel keypads control access for single entry point, up to 150 users Amityville, NY - Alarm Lock Systems, Inc., the leader in electronic pushbutton standalone locks, is ...

The circuit was designed to illustrate the operation of an electronic keypad to be utilized in the burglar alarm system by having five keys as the security syntax. The circuit was designed to ...

This series of monthly teardowns was started in early 2018 as an experiment, and since you fine folks keep reading them, I keep making them. But in truth, finding a new and interesting gadget every ...

Let’s rollback the hobby electronics calendar a few decades with [myvideoisonutube’s] alarm activation control circuit using a matrix style phone keypad. The circuit is quite old using CMOS 4081 with ...