So, whether you are just getting started with the game or have already been playing it for a while, keep reading, as we have ...

The main principle of this circuit is that the door lock opens only when the buttons in series are pressed at a time. We can use it to lock the doors and for other security purposes. This article ...

Codelocks has added the KitLock by Codelocks KL1200 NetCode electronic locker lock to its KitLock range to provide flexible, temporary access for heavy-duty, high-use environments where additional ...

A code that prevents a wireless phone from unauthorized use. When explicitly locked, and each time the phone is turned on, it will prompt the user to enter the code before it will allow a call to be ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...