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Thread: 5v power supply max rating

  1. #1
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    Default 5v power supply max rating

    What would be the max rating of power to be used? Can I use 1 70a 5v PSU vs several 20a? I thought I once read that a bigger supply doesn't really work like that. Say I want to push power to 400 pixels with one supply instead of 2-3 supplies of smaller rating

  2. #2
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    Default Re: 5v power supply max rating

    You sure can . These are what I use for 5v pixels .

    For your 400 pixels at max brightness 24A is the believed current draw , so a 30A power supply would be sufficient .

  3. #3
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    Default Re: 5v power supply max rating

    Quote Originally Posted by angus40 View Post
    You sure can . These are what I use for 5v pixels .

    For your 400 pixels at max brightness 24A is the believed current draw , so a 30A power supply would be sufficient .
    I use the same PS for all my 5v pixels as well. I get mine from Holiday Lighting. Chris is a member here and has a great selection, pricing, and quick service.
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - All Wireless with ESP>RS485 converters for AC controllers and PixelSticks for all pixel props

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    Default Re: 5v power supply max rating

    Quote Originally Posted by angus40 View Post
    You sure can . These are what I use for 5v pixels .

    For your 400 pixels at max brightness 24A is the believed current draw , so a 30A power supply would be sufficient .
    I have a 20 amp and I cant get past 150 lights. I have a 672 node matrix in 5v trying to find power options so by that standard one 70amp should power the whole thing

  5. #5
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    Default Re: 5v power supply max rating

    Are you injecting power to your pixel string? 5V can only power about 50 pixels without injecting more power. I would have power injected at pixels 1, 100-101, 200-201, 300-301, 400-401, 500-501, 600-601, 672. Your entire matrix at 100% brightness and all White should only draw a little over 40A.

    HTH
    2012 - 1st year 64 Channels - 7500 LED lights - 5 sequences
    2013 - 128 Channels - 10,000 LED lights - 7 sequences (2 New)
    2014 - 201 Channels - upgrading 8 Arches to dumb RGB - 8+ sequences (1+ New)
    2015 - 240 Channels + 8 Universes - sequences TBD
    2016 - No Display
    2017 - Back in the Game - 240 Renard Channels + 12 Universes
    2018 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2019 - 256 Renard and 9 Falcon Outputs of Pixels - 16 sequences shown over 2 nights
    2020 - All Wireless with ESP>RS485 converters for AC controllers and PixelSticks for all pixel props

  6. #6
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    Default Re: 5v power supply max rating

    Max rating you guys state vs injection and how many pixels per power injection, I think I have been misunderstanding injection..... I use the same power supply not different ones but need a + wire from PSU to injection point on pixel?

    I will take a +/- to pixel 1 through 100 then same power supply take a - just for added ground resistance with + from same power supply to pixels 101-200, ect, ect

    So if I do that I don't need say 6 PSU's just 1? So an injection point don't mean a new PSU just an additional +/- from same PSU?

  7. #7
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    Default Re: 5v power supply max rating

    Correct.

  8. #8
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    Default Re: 5v power supply max rating

    Quote Originally Posted by angus40 View Post
    Correct.

    One more quick question? When injecting power from same PSU do I need to break the + between them? I watched a video where the guy did not if it was same PSU only if using a different PSU

  9. #9
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    Default Re: 5v power supply max rating

    Correct . No breaking needed for same supply . If subsequent supplies are added v+ needs to be independent .

  10. #10
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    Default Re: 5v power supply max rating

    Quote Originally Posted by mojuave1 View Post
    One more quick question? When injecting power from same PSU do I need to break the + between them? I watched a video where the guy did not if it was same PSU only if using a different PSU
    Yes when injecting power you need to isolate the +v on each power supply. You must tie the grounds together.

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