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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 ...

This guide was reviewed by a Business News Daily editor to ensure it provides comprehensive and accurate information to aid your buying decision. At least one of your employees is bound to lose their ...

Philips’ entry-level electronic deadbolt lacks any wireless features, but it’s better than the average dumb lock and it doesn’t cost much. Philips makes a vast range of smart home gear, but it only ...

This file type includes high resolution graphics and schematics when applicable. The continuous introduction of new technologies and the growing Internet of Things (IoT) is creating new opportunities ...

Building a solid home security system requires multiple products working in tandem, though not all upgrades need to fall into the high-tech category. For example ...

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 ...

It amazes me that people are always coming up with new and interesting uses for Lego, the latest is the Lego Safe. The Lego Safe features a five double digit code lock, with over 305 billion different ...