[Video] Keep Your Home Secured With This DIY Laser Tripwire Alarm.

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.

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