We may receive a commission on purchases made from links. Many front doors have two locking mechanisms — a deadbolt and a knob or level. There are now many smart deadbolts that allow you to use ...

Here is the circuit diagram of Electronic code lock system using 8051 microcontroller. It is very useful at residential places to ensure better safety. This system demonstrates a circuit named ...

Never get locked out again with a smart lock you can control from your phone, with your face, or with a fingerprint. Never get locked out again with a smart lock you can control from your phone, with ...

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 ...