WS2812B LED Do I Need A Resistor?

Discussion in 'General Electronics Chat' started by mathiashaugaard, Jan 20, 2016.

  1. mathiashaugaard

    Thread Starter New Member

    Jan 20, 2016
    2
    0
    Hi.

    I have a small LED project, where I need to power a LED strip with 60 LED's.
    I'm going to power the LED's with an ATX PC Power Supply, where the output will be 5V - 35A.
    My thoughts were, that I just would wire the LED's directly to the Power Supply, like in this guide: https://learn.adafruit.com/digital-led-strip/wiring
    But is it safe to just power the LED strip without any resistor?
    I've seached the internet alot but I can't find the answer.

    I don't know much about electronics and therefore I need your help to determine if it's necesarry to use a resistor.
    I bought all the other necesarry things and it has just arrived, but I don't know if I abselutely need a resistor.

    Here's the datasheet for a WS2812B LED: https://www.adafruit.com/datasheets/WS2812B.pdf
    And the specific LED I use: http://www.ebay.com/itm/311509777090?_trksid=p2060353.m2749.l2649&ssPageName=STRK:MEBIDX:IT

    Sorry for my bad english.

    Best regards
    Mathias.
     
    Last edited: Jan 20, 2016
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    You don't need any resistor for this diodes.
     
  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    LED strips like that typically already have current limiting built onto the strip..
    In this case the limiting is built into the LED itself
     
  4. mathiashaugaard

    Thread Starter New Member

    Jan 20, 2016
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    0
    Ahh ok, thanks to both of you.
    The only thing I found on the internet was about single color LED's, where you need to use Ohm's law.
     
  5. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    "MOST" times when you are just buying a typical LED (single/bi or RGB colors) itself you need some sort of current limiting in your circuit.. (resistor or constant current power supply)..
    Th WS2812B is not a typical LED..
     
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