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

submitted 9 months ago by [email protected] to c/[email protected]

202 comments fedilink hide all child comments

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

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[–] [email protected] 22 points 9 months ago (2 children)

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!

[–] [email protected] 25 points 9 months ago (1 children)

Goodbye night vision

[–] [email protected] 8 points 9 months ago (1 children)

Agreed, though the original wasn't as bright as the one in the pic. It was a frosted LED and was relatively dim.

[–] [email protected] 2 points 9 months ago

I like my car dashboard like I like my 1952 F-86 Saber night variant gauges... Orange

[–] [email protected] 5 points 9 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.

[–] [email protected] 1 points 9 months ago

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