- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
- cross-posted to:
- science@lemmy.world
- videos@lemmy.world
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.
The blue LED was supposed to be impossible—until a young engineer proposed a moonshot idea.
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!
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.