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Discussion in 'LEDs and Optoelectronics' started by robin9000, Jan 22, 2011.

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  1. Jan 22, 2011 #1
    robin9000

    robin9000

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    Oct 29, 2010
    My project am trying to do is to wire up a bunch of leds and connect them to my computers power supply.

    Each led has a rating of .020 to .030 ohms and a forward voltage of 3.0 to 3.3 volts.

    Given that what I would like to know is if I wire 4 of them togeather one after the other making a total of 12 volts and then put the positive connection on the positive side and negitive on the negeitive side would this work or do I still need a resitor with a very small value to regulate the voltage.

    Also to expand this can I tie say 10 or 12 groups like this togeather the other way to give more light to my project.

    Thanks.
     
    Last edited: Jan 23, 2011
  2. Jan 23, 2011 #2
    Resqueline

    Resqueline

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    Jul 31, 2009
    You mean Amperes, not Ohms.

    If you want an undefined current and a brightness that changes with the CPU load then surely you can get away with 4 LED's in series on 12V using no (or very small) resistors.

    You mean in parallell. Yes, certainly.
     
  3. Jan 23, 2011 #3
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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  4. Jan 23, 2011 #4
    robin9000

    robin9000

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    Oct 29, 2010
    Thanks for the information, that is so great.
     
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