WS2812B LED Do I Need A Resistor?

Thread Starter


Joined Jan 20, 2016

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:
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:
And the specific LED I use:

Sorry for my bad english.

Best regards
Last edited:


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


Joined Oct 15, 2009
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.
"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..