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 ...

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, ...

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, ...

As a preview of his latest book, Arduino Project Handbook: 25 Practical Projects to Get You Started, Mark Geddes takes us through the project to create a simple laser trip wire alarm. You've probably ...

The giant vegetable competition evokes images of village fetes and the relaxed pace of an idyllic country lifestyle. But the reality of the contest is far from the romantic image of allotment life, as ...

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) ...