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You could buy a USB rocket firing turret, but this is a lot more fun to build. The ultrasonic sensor looks for any object that is closer than 30 inches. When it returns a positive signal, the turret turns and fires a foam disk. The source code is available for programming your BasicStamp2, and I’m sure you could easily modify it for other micro-controllers. Foam disc turret gun

Marc de Vinck

I’m currently working full time as the Dexter F. Baker Professor of Practice in Creativity in the Masters of Engineering in Technical Entrepreneurship Program at Lehigh University. I’m also an avid product designer, kit maker, author, father, tinkerer, and member of the MAKE Technical Advisory board.

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