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Powering pixels both directions

Discussion in 'The Family Room' started by uncledan, Oct 8, 2019 at 1:33 PM.

  1. uncledan

    uncledan Full Time Elf Generous Elf

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    The subject came in chat regarding power injecting pixels in both directions. My whole display is based upon this and I've had no issues other than maybe one blown fuse (it served its purpose). Someone in chat had mentioned that someone told them it wasn't recommended to power the strings in both directions. You should disconnect the V+ between the injection points. In my mind the fuse is to protect the wire and/or a short. If one fuse blows and you're now powering twice the pixels from one injection point... the other fuse will blow as well. Thoughts on the subject?
     
  2. darylc

    darylc 404 darylc not found Global Moderator

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    yeah ideally you should disconnect the v+ between injection points, otherwise you can end up with cascading fuse failure. In practice you can often get away without doing so though.
     
  3. OP
    OP
    uncledan

    uncledan Full Time Elf Generous Elf

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    No harm in a cascading fuse feature thought right? They still do the job. Just out a few fuses if you have an issue?
     
  4. ezellner

    ezellner Apprentice Elf Generous Elf

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    With cascading fuses it becomes a bit more challenging to find the one fuse that set off the cascade. More time to troubleshoot.
     
  5. Benslights

    Benslights Dedicated Elf Global Moderator

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    Dan I do the same with my display and have never had a issue.
     
  6. R Weiland

    R Weiland New Elf

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    Typically we inject to avoid excessive voltage drop in the pixel wiring. If using multiple power supplies then yes you might need to separate the V+ lines. If powering a run of pixels from a single supply then powering the pixels from both ends is the standard practice. See the 101 Lighting manual on power supplies for more info on power injection.
    Cheers
     

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