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

submitted 10 months ago by Whirling_Cloudburst@lemmy.world to c/technology@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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[–] nicerdicer@feddit.de 5 points 10 months ago (1 children)

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.

[–] KyuubiNoKitsune@lemmy.blahaj.zone 1 points 10 months ago

Very interesting. I think my mom bought her car in 1996