9- volt gold leds

Discussion in 'Off-Topic' started by loosewire, Oct 26, 2010.

  1. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    Does radio shack stock 9-volt ready to go leds.
    I need to go,anybody hanging out.


    p.s. I got a remote car opener apart without
    tearing It up,3 volt battery.It got wet and run over
    It. Got the water out,need to get new battery.
    Maybe radio shack has tester. Very miniture
    curcuit.More to come.Help with leds Info,how long
    will 9 volt battery last appox,a few hours or-----
     
    Last edited: Oct 26, 2010
  2. tom66

    Senior Member

    May 9, 2009
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    9 volt LEDs? You mean LEDs with built in resistors? Why don't you just solder a resistor to one of the LED's terminals? 330 ohms works well for most LEDs.

    A 9V alkaline typically has 500mAh capacity, assuming 20mA LED current draw it will last a bit longer than a day. Actual results will vary, expect less than this.
     
  3. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    When an electronic device gets wet, immediately yank out the battery, then disperse the water with 90% isopropyl (rubbing) alcohol. Let it all dry, add fresh batteries, and the item is usually saved.

    As for a 9v LED, a yellow-orange LED with a 470 Ohm resistor in series would give it about 15mA. I'm not sure why a 9V is needed, since you stated there was a 3V battery in the unit. :confused:
     
  4. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    Again I mixed two subject,I can understand
    not making things clear. The wet Item was
    a car remote. The leds I wanted to attached
    to some thing for display. I was told that the remote
    was fried so I didn't attemp right away to take It
    apart. Under the soft rubber buttons you have a
    thin plastic piece with bumps coated with a black
    substance.When you press a button the black
    substance makes contact with a grid of metal
    to close curcuit. The grids look all the same,but
    does different duties such locking and unlocking
    doors. I going to test the battery,I don't have much
    hope.Too much time has passed. I went by radio shack,
    I was surprised they didn't have any gadgets will leds
    that I could take apart to make a gadget of my own.
    All they had was leds and sockets for bread boards.
    I wanted to take leds from plastic and put them on
    heavy cloth.
     
    Last edited: Oct 27, 2010
  5. t06afre

    AAC Fanatic!

    May 11, 2009
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    [​IMG]
    You can not take the LED out of the plastic housing shown in this picture. But you can get LED of SMD type that is very small, and has a very low profile. But they are not easy to work with.
    http://www.mhled.com/en/
     
  6. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    Thanks so much for the link,It helped me me find others.
    You see people wearing battery operated gear that looks
    like what you need,but they can't remember where they
    got It or It was a gift. That the reason you get so many
    questions about power limitations.Radio shack sells the parts,
    but no current Information.
     
  7. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    Most all new LEDs (clear lens) are very bright with 15-20mA, I usually run around 15mA, going as high as 25mA for brightness (sacrificing LED lifetime) when LED is run by PWM or otherwise used only in short on-times, such as a blinking alert indicator.

    The clothing LEDs are the surface mount variety. They typically come on a tape ready for machine placement. 38 Cents Each for 600nm from DigiKey "Gold" being Amber, so in the range of 590-600 nm I'm guessing.

    LED Colors and Wavelengths:

    UVC 100-290 nm
    UVB 290-320 nm
    UVA 320-400 nm
    Blue - 475 nm
    Teal - 495 nm
    Green - 510 nm
    Yellow - 570 nm
    Orange / Amber - 590 nm
    Red - 650 nm
    Near Infrared NIR 0.78 - 3 µm
    Mid Infrared MIR 3 - 50 µm
    Far Infrared FIR 50 - 1000 µm
     
  8. bertus

    Administrator

    Apr 5, 2008
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  9. loosewire

    Thread Starter AAC Fanatic!

    Apr 25, 2008
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    Thanks,Guys you have give me some good Information.
    Going to radio shack was a big step for me,looking thru
    there stock drawers show me they are behind the curve.
     
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