Body Heat Powers Flashlight, Not Batteries
We can’t exactly shoot light from our fingertips like we’ve seen in movies, but a new flashlight is bringing us a step closer.
A new finger-sized flashlight called Lumen uses body heat to power a beam of light. With a minimalist design and no buttons, the aluminum case is designed to effectively store heat.
The flashlight uses a thermoelectric generator, which is a small ceramic bar that produces an electric current when there’s a temperature difference between the external environment and a power source, in this case the user’s body heat.
Story via Discovery News
http://news.discovery.com/tech/alternative-power-sources/body-heat-powers-flashlight-not-batteries-151020.htm
#scitech #science #innovation
I can see great use for them in emergency situations, providing light when there is no power. As long as the costs can be kept low
ReplyDeleteThermodynamics requires a cold sink in addition to a heat source. This will work best in cold nights, and fail during heat waves.
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