A Traffic Light
This is an environmentally-friendly traffic light design. Three different color-changing LEDs replace the electric energy with solar energy, reduce the manufacturing cost and energy consumption from an infrastructure everybody uses.
Contact: Yao-Chieh Lin: paulwater713@gmail.com
Credit: Yao-chieh Lin, Cheng-Tsung Feng and Bo-Jin Wang of National Yunlin University of Science & Technology (Taiwan)
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 Jim Kaufman |
 Gordon Perry |
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 Hannah I. Duffy |
 Nancy Perkins |
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