New Code Lock logic game uses Fun Squared's Ninecode Challenge system, a visual logic puzzle using symbolic clues to ...

The Yale Code is a new electronic lock that borrows many features from smart locks like the Assure Lock 2, yet it isn’t technically a smart lock. It lacks support for Google Home, Amazon Alexa, Apple ...

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 ...

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 ...