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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Color changing LEDs
I keep seeing these little solar power sidewalk lights. Last year
they were all white (blueish white). Lately I see them where they change color. Yet, they only have one LED. How can a LED change color? I thought the color was determined by dopeing it with a metal. So how can they change? This has me puzzled. |
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