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"Nah, it's not like tagging an intruder with shades of neon green, yellow and orange will do much to disable him / her, but it would probably make 'em think twice before going any further. 'Course, we're sure one could think of other uses for an automated paintball gun, and for those creative enough to agree, Team Cynergy has put together a videotaped how-to guide for building a laser-based motion detector and connecting it to your gun. We'll save the technicalities for those who dare to check out the near-10 minute clip posted after the break, but the long and short of it involves a Parralax BASIC Stamp 2 microcontroller, a red laser pointer, a servo and a good bit of tinkering (among other things). Besides, this is a lot less dangerous than that motion-activated BB rifle and laser-guided turret you built earlier this year, so why not flex some DIY muscle and give this endeavor a go?[Via HackedGadgets]"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2007/11/26/automated-paintball-gun-keeps-the-residence-secure/>