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10 LED string.

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Discussion in 'LEDs and Optoelectronics' started by TbirdMan, Feb 22, 2012.

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  1. Feb 22, 2012 #1
    TbirdMan

    TbirdMan

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    Apr 17, 2011
    Ok, I am putting some super bright red LED's in my computer case for lighting. after playing around with different arrangements I came up with this, I just wanted to know if I missed any potential problems.
    [​IMG]
    Data sheet is here:
    What i can gather:
    current is 70mA
    Vf is 2.5V
     
  2. Feb 22, 2012 #2
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    70mA seems an awful lot.

    Do you have the specs on these LEDs? 20mA is probably closer to what I'd expect unless they're a high powered LED.
     
  3. Feb 22, 2012 #3
    War_Spigot

    War_Spigot

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    Feb 20, 2012
    He did say super bright in his OP, but 70mA does seem excessive.

    from http://led.linear1.org/led.wiz
     
  4. Feb 22, 2012 #4
    TbirdMan

    TbirdMan

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    Apr 17, 2011
    Last edited: Feb 22, 2012
  5. Feb 22, 2012 #5
    War_Spigot

    War_Spigot

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    Feb 20, 2012
    The LED wizard said it would dissipate 4.2W at 350mA, so depends on your power supply, I suppose.
     
  6. Feb 22, 2012 #6
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,477
    2,820
    Jan 21, 2010
    Yep, so 70mA seems fine. :)

    You may be able to get lower dissipation by placing three in each string, but given the environment, I'm not sure it would make that much difference.
     
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