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A little background... At school, we are currently doing a unit in which we make a vehicle that goes exactly 5 meters but is not powered by any chemical source. This may sound easy, but "chemical source" also means no gas and NO BATTERIES. I could do the "easy" method and use a spring and rubber band or something, but if I learned anything, it's that when I have a problem, the answer is an Arduino board. The idea I am thinking of using an Arduino Nano-like board, as it uses .4 to .8 vo...