Home security systems can be complicated, if not downright expensive. Instead of spending a lot on top-of-the-line security systems for your home, you can actually make your own security system using a simple laser pointer.
Just like what you see in the movies, this simple DIY project features a laser security system in which an alarm goes off when a laser beam is interrupted. All you’ll need are a simple laser pointer, as well as a few dollars’ worth of electrical parts.
Continue to the Next Page to start reading the article and watch the video: Laser Tripwire Alarm.