To make a Gauss gun, all you need is a piece of metal rail, two magnets and steel ball bearings that fit on the rail. Then rig it up, and you have your own magnet-powered gun that shoots ball bearings!
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Make a PVC Hand Pump to Move Water, Compress Air, & Create Vacuum
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10 Unique & Practical Ways to Repurpose Your Old Hard Disk Drives
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Hack Your Electricity Meter
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DIY Stick Welder from Old Microwave Parts
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