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A Canadian teenager built a flashlight powered by body heat that can shine without batteries
A young Canadian inventor, Ann Makosinski, created a remarkable flashlight that runs without batteries. It cleverly uses the ...
September 4, 2014 Add as a preferred source on Google Add as a preferred source on Google If you need to do some serious nighttime spotting, you can make a powerful spotlight using a flashlight ...
In case you’re not aware, you can hop on your favorite online Chinese electronics retailer and buy a hundred Watt LED module for less than $10 USD. That’s an enormous amount of retina-burning fun, but ...
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