There’s a spy movie – probably from the [James Bond] franchise – in which our hero is staying in a fancy hotel. It’s crawling with enemies, naturally, and eager to see if one has been snooping in his ...

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

Learn how to make a simple door alarm to enhance your home security with our step-by-step guide. This DIY theft alert alarm ...