"Dad, is there something we can build to measure the speed of a B-Daman marble?" Now THAT's the kind of question a geek dad loves. This project is built with Arduino, a cheap programmable computer on a circuit board. It allows you to combine readings from things like photoresistors and switches avai...By: brianfit1
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from Instructables: exploring - technology - robots http://ift.tt/1o5B7SI
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