With a watch battery, an LED, and a 3D printer. Do it. See the pictures above to design your case. All you have to do is design one like this or you can make it different. We made a spaceship one with two holes for LED leads, an a normal one. For a button, I use my finger to push down the extra l...By: futurenavyseal
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from Instructables: exploring - technology - robots http://ift.tt/1uwLU9t
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