light emitting diode
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LED Etch A Sketch Lets You Shake to Erase
The Etch a Sketch toy has gone more or less unchanged for over 60 years, but if you’re handy with…
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Scientists Invent Light-Up OLED Tatttoos
OLED tattooPhoto: Barsotti – Italian Institute of Technology Tattoos are usually considered a form of personal expression, but a team…
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