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Why It Was Almost Impossible to Make the Blue LED(youtu.be)

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Whirling_Cloudburst@lemmy.world
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The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.

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KyuubiNoKitsune@lemmy.blahaj.zone
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The first blue LED I ever saw was on the dashboard of my mom’s VW Golf. I always wanted one like that, but now they’re everywhere!

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nicerdicer@feddit.de
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Before there were blue LED, the indicator light for full beam was a blue tinted incandescent bulb. My parents had a Volkswagen Passat from the 1980s (?) where the usually blue indicator light for full beam was a green LED, since blue ones were not invented back then.

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