Ever wanted to make a robot, but don't have an H-bridge handy? Then make your own! It is simple, cheap to make, and is simple in concept and design. It doesn't have Pulse Width Modulation to control speed, but that isn't totally necessary. Get it! All you need is... 4 NPN transistors (salvage fro...By: NOLAN14
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from Instructables: exploring - technology - robots http://ift.tt/1z4iYob
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