With exams behind him [Adam Greig] had time to make a Nerf sentry gun. It’s actually quite easy to pull everything together. He’s got a netbook running Motion, an open source motion sensing program ...
Fans of Valve’s Portal series of games will appreciate this real-life Portal Turret gun, which has been created by YouTube user kss5095 for his Advanced Mechatronics class at Penn State University.
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