Yes it is true. By simply walking in shoes equipped with a small generator embedded within the sole of the shoe, you can actually produce enough power to run simple electronic devices. The new voltage regulation circuits that efficiently convert a piezoelectric charge into usable voltage for charging batteries or for directly powering electronics is a breakthrough by Dr. Ville Kaajakari, assistant professor of electrical engineering at Louisiana Tech University. Just think of all of the electronics you can power on the go...
Source: http://electrical.about.com/b/2014/03/17/power-walking.htm
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