While the Web is full of DIY electronics projects, few are useful as they are entertaining. That’s not the case with this one here, however — a laser tripwire alarm system, which can be used to secure ...

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 ...