In this step-by-step tutorial, you'll learn how to make a very loud, simple, and powerful alarm using everyday materials.

You can easily repurpose your old iPhone or Android as a free home security camera. Let's talk about that graveyard of old phones you have stashed in a drawer. Instead of letting them collect dust ...

In this informative video, you'll learn how to make a door alarm using simple materials and easy steps. Perfect for enhancing ...

Abstract: The increasing proliferation of surveillance cameras to keep an eye on human behavior has led to a rise in the need for an automated system that can identify violent incidents and suspicious ...