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 ...

Ring Alarm has quickly become one of TechHive’s favorite home security systems, thanks to its solid hardware, low monthly running cost, and great potential for expansion. The secret of the latter is Z ...

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 ...

The door opening alarm circuit or “Front Office Visitor Alert” is used for alerting you when a customer is at your office/shop. It will produce a beep sound when each new customer or visitor is ...

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 ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Arlo is mostly known for its popular security cameras, but ...

Your doors may not magically slide open like on "Star Trek," but they can at least sound like it with ThinkGeek's motion-activated electronic door chime. Freelance writer Amanda C. Kooser covers ...

Onvis has recently updated its door/window contact sensor, the CT3, to incorporate Thread technology. With this update, the Onvis CT3 contact sensor is now able to seamlessly integrate with HomeKit ...

Ring might be best-known for its lineup of video doorbells, but the company also produces an impressive array of alarms and sensors to help secure your home. One of its most popular security gadgets ...