Education & KnowledgeThe blue LED was almost impossible to make
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Kevin Karhan 
@vfrmedia Yeah, I remember when those still had yellow displays because the original idea was to use yellow as hint (i.e. indicators, fuel low) and red for critical things (low oil, low battery voltage)...
Also it took till the late 2010s for #BlueLEDs to become very cheap.
- I remember in the 2000s they were 3x the price of green, 4x the price of yellow and 5x the price of red LEDs if not more...
A lot of people who know will put #BlueLEDs as fundamental #tech next to #Diesel & #Steam #Engines, #ScrewPropellers, #FiberopticCables and #GunPowder...
How Blue LEDs Were Invented - LGR Tech Tales
ShawnT π§πTook a bunch of jiggling and jostling, but my new cable modem is in, provisioned, and a speedtest shows double the bandwidth of the old modem. Also, it is BLUE.
BLLLLUUUUUUUEEEEEEEE.
Bornach@drahardja
JohnAudioTech shows how dim the silicon carbide based blue LEDs were that predated the GaN technology
https://youtu.be/3qudfg5sIt0
#BlueLEDs #electronics
JohnAudioTech shows how dim the silicon carbide based blue LEDs were that predated the GaN technology
https://youtu.be/3qudfg5sIt0
#BlueLEDs #electronics
The blue LEDs that existed before the current InGaN blue LEDs
Eugene Alvin Villar π΅πBecause I have some background in electrical and electronics engineering back in college, I was already somewhat familiar with Nakamuraβs work in inventing the blue LED. But this Veritasium video is really excellent in explaining how wonderful this invention was. Plus, the animations are so good that I wish we had these back when we were learning how semiconductors and diodes work.
#physics #semiconductors #diodes #LEDs #BlueLEDs #ShujiNakamura
Why It Was Almost Impossible to Make the Blue LED
therieauThis eye mask story has been getting a lot of play this week, and the βyouβre doing sleep wrongβ vibe is annoying. In addition to the big stuff, how about hunting down all of the blue LEDs and status indicators and turning them off? Are they dimmable? Can their light be diffused? Painted over? Covered?
#sleep #health #BlueLEDs
https://www.washingtonpost.com/wellness/2024/01/18/eye-mask-sleep-cognition-health-benefits/
wookiearocketsome of the more impactful technology breakthroughs happening in our lifetime are likely to go mostly unnoticed.
https://spectrum.ieee.org/blue-pholed
#blueleds #oled
https://spectrum.ieee.org/blue-pholed
#blueleds #oled
Omega_Scribet (has moved)Impressive lecture about light, near infrared (NIR) to be precise. The need to get outside, to get NIR (so it can penetrate the skin) and its health benefits for all animals, including humans. About the shortage that many are experiencing nowadays, since the use of white LED lights. And the disadvantages of blue light.
Some interesting studies are discussed.
Do turn on the subtitles.
https://www.youtube.com/watch?v=AST9s42LBg8
#NearInfrared
#nearinfrared
#NIR
#blueleds
#BlueLights
#Photobiomodulation
#health
