For those who use laser pointer for presentation, u may want to free your hand for controlling mouse, turn to some pages..... this laser ring can free your hand and even can control it properly with your other hand. I made some designs, and this it the one made from a chess.+++++++++++++ Materials +...By: kokpat
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from Instructables: exploring - technology - robots http://ift.tt/1KvNP4k
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