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 ...

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 ...

Springfield, Missouri—August 10, 2007— Digital Monitoring Products, introduces a new feature update to the 780 Keypad Demonstrator module, making it an invaluable tool for both selling to ...

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 ...