"Mixing" WS2811 pixels to use as null pixel

Discussion in 'RGB Lights - Intelligent Pixels and 3-Channel RGB' started by toodle_pipsky, Nov 22, 2015.

  1. toodle_pipsky

    toodle_pipsky Minister of Silly Walks

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    Hi dudes, I have determined I need a null pixel on a set of pixicles, which are WS2811 running on 12v. Unfortunately I don't have any left over strings to harvest a pixel to create a null, but I do have a heap of spare pixels which are WS2811 running on 5v.


    Is it possible to use one of these 5v pixels as a null pixel by running 5v to it, have the 12v bypass it, so just running the data through? If that makes sense!


    Thanks. :)
     
  2. AAH

    AAH I love blinky lights :) Community Project Designer

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    All pixel data is 5V so that should be no problem. The problem will be getting 5V to power the 5V pixel.
     
  3. OP
    OP
    toodle_pipsky

    toodle_pipsky Minister of Silly Walks

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    Awesome, thanks heaps for the info. :)
     
  4. lizardking

    lizardking IT IS STILL ALL BENS FAULT

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    if using a 5v pixel in a 12v string you will need to inject it with 5v power
     
  5. i13

    i13 Senior Elf

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    You can do this but you shouldn't connect the positive between the different voltage pixels. Only connect the negative and data.

    It is always good to order a few more pixels than you need. You'll be in trouble if you have one pixel die.
     
  6. Skunberg

    Skunberg Full Time Elf

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    Re: "Mixing" WS2811 pixels to use as null pixel

    Couldn't you send 5v from the controller and inject 12v where they start?
     
  7. multicast

    multicast Senior Elf Generous Elf

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    5v1 zener diode will do the job to hook your 5V pixel ( null ) to a 12V supply..
     
  8. AAH

    AAH I love blinky lights :) Community Project Designer

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    A resistor and zener actually. It's too late at night for me to do the maths but you can't just put a zener diode in there to regulate the 12V down to 5.1V.

     

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