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Author Topic: NOT STEAM....... just fun. 3 x CFL Offering a trio  (Read 784 times)

RedRyder

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Re: NOT STEAM....... just fun. 3 x CFL Offering a trio
« on: September 22, 2020, 08:18:23 am »
Quote from: Tadfafty on September 14, 2020, 10:06:53 pm
The first ever LED was made in 1927.


Or perhaps 20 years earlier:
wiki:Light-emitting diode[edit]

Recreation of the 1907 experiment by H. J. Round on the observation of electroluminescence from a point contact with a carborundum (silicon carbide) crystal.In some later experiments with cat's whisker detectors using a variety of substances, he passed current through them and noticed that some gave off light – the first known report of the effect of the light-emitting diode (LED). Round published his result in 1907 in Electrical World
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