yellow led fans

GnomeWizarddGnomeWizardd Member 4 LifeAkron, PA Icrontian
edited November 2004 in Hardware
Ok guys i need 2 x 120mm Yellow LED fans and 1x 92mm LED Fan I cant find them anyplace! HELP ME!

Comments

  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2004
    I've never seen a yellow LED fan. Ever.
  • primesuspectprimesuspect Beepin n' Boopin Detroit, MI Icrontian
    edited November 2004
    Do they even make yellow LEDs yet?
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2004
    As far as I know, not technically -- I'm pretty sure they have to paint the inside of a white LED with translucent yellow.
  • botheredbothered Manchester UK
    edited November 2004
    RS (Radio Spares) sell yellow LEDs. Here is the Data sheet. This is the 3mm, they also do a 5mm and a few others.
  • KwitkoKwitko Sheriff of Banning (Retired) By the thing near the stuff Icrontian
    edited November 2004
    I've never seen yellow LED fans. I've only seen cold cathodes or electroluminescent tape.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited November 2004
    Yellow LEDs have been around FOREVER guys... I took apart a VHS recorder made in the 1980s that had yellow LEDs.
    http://www.quickar.com/discrete.php?session=YL8zKoyD

    However, I haven't seen any fans with yellow LEDS
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited November 2004
    That's not the argument. I was just saying that I'm pretty sure TRUE yellow LEDs haven't been made yet, LEDs that don't require a painted interior like white, red, blue or green.
  • godzilla525godzilla525 Western Pennsylvania Member
    edited November 2004
    I can't believe I'm reading this....

    You all should be ashamed. :p

    http://wolfstone.halloweenhost.com/TechBase/litled_LightEmittingDiodes.html
    The history of Light Emitting Diodes (LEDs) is the struggle for shorter and shorter wavelengths: the quest for blue, with efficiency improvements along the way.

    The first light-emitting semiconductor was a yellow-glowing piece of Silicon Carbide invented by Henry Joseph Round in 1907. There was not enough light to be useful, and silicon carbide is hard to work with, so the invention was mostly forgotten.

    The modern LEDs were based on Gallium Arsenide (GaAs) and emitted infra-red light. If memory serves me, the early lab models needed to sit in liquid nitrogen while operating. Getting them to operate with reasonable efficiency at room temperature was a big breakthrough, providing a commercial product useful in things like object sensors and remote controls.

    Red LEDs came next, using Gallium Arsenide Phosphide (GaAsP on GaAs substrate). Eventually these led to the development of high efficiency red, red-orange, and orange LEDs by changing to a GaP substrate.

    Mid 1970's brought Gallium Phosphide (GaP) diodes, providing greater efficiency, but a somewhat orangeish red light. Soon GaP diodes were putting out pale green, and dual chip GaP LEDs (red and green) were emitting yellow. Then they got to a pure green.

    In the mid 1970s, yellow LEDs were made in Russia using Silicon Carbide. The rest of the world used Gallium Arsenide Phosphide (GaAsP on GaP substrate).

    Mid 1980's saw the arrival of super high brightness (GaAlAsP) LEDs, first in red, then yellow.

    In the early 1990's, ultrabright InGaAlP LEDs were made in orange-red, orange, yellow and green.

    The first significant blue LEDs came in the early 1990's, using Silicon Carbide. This was a throwback to the earliest semiconductor light sources.

    The mid 1990's brought ultrabright blue GaN LEDs, then Indium Gallium Nitride (InGaN) LEDs, producing high-intensity green and blue.

    The bright blue LEDs were then made the basis of white LEDs by painting the LED chip with fluorescent phosphors. This same trick can produce virtually any visible color.

    :shakehead
  • madmatmadmat
    edited November 2004
    I had a Blaupunkt Toronto car stereo that had dual color LEDs in it and you could go from green to dark red and every color in between by an adjustment within the stereo's software and a very brilliant yellow was in there.
  • danball1976danball1976 Wichita Falls, TX
    edited November 2004
    I know that if you overvolt a red LED, it'll get close to yellow, but more or less it is an orange color. Of course, if you do that, it'll burn out after a couple of minutes.
  • Straight_ManStraight_Man Geeky, in my own way Naples, FL Icrontian
    edited November 2004
    Do the 120mm's have to be PURE and BRIGHT Yellow _LED_???? Would the one this link http://www.xoxide.com/oruvse12fan.html work for what you want??? It's a Yellow UV sense glow fan.... :D XoXide also has what they call Stove fans, but only in 80mm, those are at this link: http://www.xoxide.com/logisys-stove-fan-red-yellow.html And, they have Fireworks fans, again only in 80 mm: http://www.xoxide.com/fireworkled1.html. Cooler Master has Neon LED fans, also, here's a pic of one in 80 mm: http://www.xoxide.com/cooler-master-neon-led-fan-orange-tlf-r82-eo.html And, if a slot cooler in UV-sensitive Orange would help, try this: http://www.xoxide.com/uvslotcooler1.html .

    For those in the UK, try this:

    http://www.casetech.co.uk/product_info.php/products_id/261

    Oh, THIS THREAD is result number 6 when you google:

    Yellow +LED +Fan

    , and exploring the top 5 results is where I got links in this post....
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