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, ...

The project is intended for home protection where a powerful and easy to make laser alarm system is implemented. The laser alarm system can be used indoors or outdoors to protect the entire home. This ...

NEW YORK -- A 15-year-old boy damaged his eyes while playing with a laser pointer he'd bought over the Internet, say doctors who warn that dangerously high-powered versions are easily available online ...