Instructables user [EngineeringShock] has been hard at work building a laser trip wire security system, complete with a combination lock. The security system works just like you see in the movies, ...

Sometimes security doesn’t need to be overly complex to be effective. Instructables user [1234itouch] recently built a simple laser tripwire alarm that can be mounted virtually anywhere, complete with ...

When it comes to home security, it's simpler than you'd think to DIY a quality system. What's a security system without lasers, though? In the video above, MAKE Magazine shows how to create your own ...

Remember the days of the simple photo-electric cell? Using either a transmitter-receiver pair or a single TX/RX with a retro-reflector, the interruption of an IR beam would trigger an alarm, stop a ...

This circuit is a laser alarm system like the one we see in various movies. It uses a laser pointer beam to secure your valuables and property. Essentially, when the beam gets interrupted by a person, ...

All products featured on WIRED are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. Motion detectors mean false ...

The Gun Operated Alarm Clock was a good conceptual design, but the Laser Target Alarm Clock has two things that its predecessor lacks. First off, it is vastly more challenging (and therefore annoying) ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. We originally tested and reviewed the Ring Alarm Security ...