About: “The Hollow Flashlight” at the Google Science Fair
Need light? Look no farther than the palm of your hand—literally. Ann Makosinski’s “hollow flashlight,” her winning design from the 2013 Google Science Fair competition, is made from Peltier tiles that produce energy when one side is heated and the other side remains cool. Using only the warmth of her hands for energy, this Canadian teen’s flashlight is able to produce a steady beam of LED light for 20 minutes.
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