Economical circuit of an electronic alarm, notifies you when your door or window is open, is presented here. This circuit wired around the Quad 2-input NAND Schmitt trigger IC 4093 (IC1) can be ...

If the sound of someone jiggling your doorknob absolutely petrifies you, then a new device that’s aimed at scaring off potential intruders may be just what you’re looking for. Sabre, a company known ...

Vacation is a time to relax, but even the most serene getaways can be stressful when you’re in an unfamiliar place. That's why Jill Dressel, a private flight attendant who travels frequently, decided ...

As a flight attendant, CiCi frequently stays in hotel rooms alone. To feel safer, she packs a door lock and door alarm. These tools help, but she always encourages travelers to listen to their gut.

February 20, 2018 – STI’s newly redesigned Exit Stopper Door Alarm continues to help solve the problems of unauthorized exits and entries of fire or emergency doors. The multifunction door alarm now ...

Now you can build your own simple door alarm security system using a tiny microcontroller chip PIC12F635! The circuit is nothing but an aural alert unit, which raises ...

This security system is entry-level in every sense of the word, and it’s only appropriate to serve the most basic of security needs. I suppose if I was looking for a no-frills, absolutely basic ...

In this informative video, you'll learn how to make a door alarm using simple materials and easy steps. Perfect for enhancing your home security, this guide will walk you through the process of ...