Technology

59132 readers

3945 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

[email protected]

922

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

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

203 comments fedilink hide all child comments

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

you are viewing a single comment's thread
view the rest of the comments

[–] [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