\u00a9 2020 wikiHow, Inc. All rights reserved. In this article, I'll show you how to build a coil gun. So to source for such high current most people use a big capacitor to deal with it. This homemade gun uses electromagnetic coils to send steel rods flying at a speed of 138 feet per second. Wear rubber insulated gloves throughout the build to protect yourself from getting shocked. In this example, I have used electrical tape to create ends that prevent the coil from moving and/or unwinding. I've tried to make it fairly safe in that it won't fire the projectiles with too much power as long as you charge the capacitors to only around 100 volts. What is a coilgun or gauss gun? You should go for enameled wire for efficiency reasons. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. That being said let’s get started. To build a coil gun, all you need are a few tools, some wire, and a disposable camera. 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