Device harvests energy from train tracks

There are more than 140,000 miles of train track in the U.S., many of them laid across lonely stretches of land with nary a power line in sight. Thankfully, there’s a new gadget to harvest energy from vibrations generated in the track by passing trains to power track-side devices.There are more than 140,000 miles of train track in the U.S., many of them laid across lonely stretches of land with nary a power line in sight. Thankfully, there’s a new gadget to harvest energy from vibrations generated in the track by passing trains to power track-side devices.






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Read the original at NBCNews.com: Future of Tech.