Electronics Wiring LED's in parallel

Discussion in 'Modding' started by Stickeh, 18 May 2004.

  1. Stickeh

    Stickeh Help me , Help you.

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    Alright guys?
    Im plaiing to wire some Blue leds in parallel on the 12v line, now i have some 12v resistors to use, but i am unsure as to where they should / can be placed.Should i place an led at the base of each led, or should i place the resistor along the 12v line before it reaches any leds?
    The diagram below may help:
    [​IMG]
    So can/should i put the 12v resistor in position R| or R|| ?
     
    Stickeh, 18 May 2004
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  2. SteveyG

    SteveyG Electromodder

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    Position R|| is correct for those resistors.
     
    SteveyG, 18 May 2004
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  3. Stickeh

    Stickeh Help me , Help you.

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    alright, so for my next question, how many leds can i wire up in parrallel on the 12v line?
     
    Stickeh, 18 May 2004
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  4. acrimonious

    acrimonious Custom User Title:

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    Depends on your PSU and LED. The average LED draws, say, 20mA which is 0.02 of an amp. A decent PSU can sustain about 28A on the +12V line so 28/0.02 = about 1400 LEDs
     
    acrimonious, 18 May 2004
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  5. nosmo

    nosmo What's a Dremel?

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    Oh is that all ? :D
     
    nosmo, 18 May 2004
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  6. Stickeh

    Stickeh Help me , Help you.

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    That is what i thought, lol.
    Thanks guys!
     
    Stickeh, 18 May 2004
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  7. Xipher

    Xipher What's a Dremel?

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    Thing is, you also have to take out all the power your Motherboard and other components take from that, you should also include some over head as well, to make sure you don't over draw from the power supply.
     
    Xipher, 18 May 2004
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  8. Stickeh

    Stickeh Help me , Help you.

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    well yeh, i thought of that too, but tbh, i dont think ill be hooking up 1400 leds anytime soon. i was thinking of just the 10-20 lol
     
    Stickeh, 18 May 2004
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  9. cpemma

    cpemma Ecky thump

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    I'd put 3s in series and use 4,200. :p

    OstickO, you can save on resistors by using 3 blue leds in series on the 12V line, with a 100R resistor to each string.
     
    cpemma, 18 May 2004
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