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Magneto-Track smart footballs

engineers at Carnegie Mellon and NC State have developed a football tracking system that could one day replace the old "stick-and-chain" measurement system for calling a first down. It's called the Magneto-Track system, and it uses low-frequency magnetic fields to follow a tracker embedded in the game ball. http://www.engadget.com/2014/09/05/magneto-track-footballs-know-where-they-are-and-what-direction-t/ #tech

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