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Thread: Pixels on 1 Power Supply

  1. #1
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    Default Pixels on 1 Power Supply

    Quick question. How many 12v pixels can I place on 1 350 meanwell power supply at 30%?


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  2. #2
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    Default Re: Pixels on 1 Power Supply

    It depends on the type of 12v pixel you are using. Assuming the typical WS2811 bullet node, it uses 0.06A / pixel. If you are using 30% then each pixel will use about 0.018A. The PSU can provide ~30A. 30A * 0.8% (max load) = ~23A. 23A / 0.018A = ~1275 pixels.

    FYI: IMO this is a poor design. It will work, but you have locked yourself into an intensity setting that may not work well for your effects. My recommendation is to always build props designed to run at 100% brightness and then choose to use lower intensities in your sequencing.


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  3. #3
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    Default Re: Pixels on 1 Power Supply

    Quote Originally Posted by MartinMueller2003 View Post
    It depends on the type of 12v pixel you are using. Assuming the typical WS2811 bullet node, it uses 0.06A / pixel. If you are using 30% then each pixel will use about 0.018A. The PSU can provide ~30A. 30A * 0.8% (max load) = ~23A. 23A / 0.018A = ~1275 pixels.

    FYI: IMO this is a poor design. It will work, but you have locked yourself into an intensity setting that may not work well for your effects. My recommendation is to always build props designed to run at 100% brightness and then choose to use lower intensities in your sequencing.
    Thx for your advice. I have a falcon differential receiver and wanted to use 1 power supply. I only need to power 3 candy canes (99 pixels each) and 4 leaping arches (50 pixels each). So wanted to see just how much power would be needed to power them.


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  4. #4
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    Default Re: Pixels on 1 Power Supply

    Grab yourself a server supply that is 12 volt, 750 watts and 62.5 amps. They are cheap. Get a breakout board for 6 bucks at Parallelminer.com and you’re on your way.


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  5. #5
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    Default Re: Pixels on 1 Power Supply

    Don't forget to go here!
    http://spikerlights.com/pwrinjection.aspx
    The link is at the top of that page for the calculator. Super helpful.

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