Have you ever noticed that almost all baseball caps are ready-made for inserting LED's? Why don't cap manufacturers just go ahead and insert 3-mm LED's into the 6 threaded grommet holes (eyelets) in the top of the hat? After all, besides the LED ports, each cap also comes equipped with 6 seams to ...By: BillT3
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from Instructables: exploring - technology - robots http://ift.tt/1HB4YrP
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