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Thread: P10 Panel Engineering

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    Registered User Tripplett's Avatar
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    Default Re: P10 Panel Engineering

    I did some tests today to calculate current draw. An 8 panel P10 setup running full white draws 6.7 amps. Calculated out that comes to 33.5 watts at 5 volts (just barely 10% of my 350w power supply's ability). That is about .85 amps per panel. I tested this with both XLights and FPP's test mode just to make sure they were putting out 100% A butterfly effect was half that at around 3.5 amps.

    For those wondering that means a full 8x8 panel matrix (64 P10 panels) will draw approx 54 amps or 270 watts at 5 volts. One 350 watt 5v power supply will be enough for any P10 setup.
    Thanks FrankP thanked for this post

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    Official Lurker EricR's Avatar
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    Default Re: P10 Panel Engineering

    Great news for Sam!!

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    Registered User Tripplett's Avatar
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    Default P10 Panel Engineering

    I re-did my panels so all 8 are just using 1 of the Octoscroller outputs instead of 4 on the beaglebone. The reason is that the FPP is going to change soon. Right now the code drives all 8 outputs on the Octoscroller even if you only define 1. Sloppy programming. Soon it will only drive the outputs you define so it will be more efficient if you are only driving a few panels on one or two outputs. As you can see the panels are zig zagged. The first panel off the BB is panel 1 in FPP and increments from there. You click on the arrows in FPP to indicate the physical arrows on the back of the panels. This is highlighted in the below picture.
    Thanks FrankP thanked for this post
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    Registered User Tripplett's Avatar
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    Default Re: P10 Panel Engineering

    This is a link to a post at Falcon Christmas containing a pdf document that helped me when I was first setting up my p10 panels. I attached the document here too.
    My BBB and P10 panel setup+

    MyP10PanelSetup_v2.pdf
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    Member Chris Gebhardt's Avatar
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    Default Re: P10 Panel Engineering

    Joe, you said that you only used 2 of the power connectors? Well I did the same thing. Was this what you did? I haven't powered it up yet for fear that it may not be correct. -powerplug.jpg

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    Registered User Tripplett's Avatar
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    Default Re: P10 Panel Engineering

    Yea that's what I did. It I used the outer two pins, not the inner. That shouldn't matter. The two on one side are + and the two on the other side are -. So it's like ++--

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    Registered User FrankP's Avatar
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    Default Re: P10 Panel Engineering

    An alternative to the BBB / Octoscroller solution.

    PI Adapter for Matrix Panels

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    Registered User FrankP's Avatar
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    Default Re: P10 Panel Engineering

    Finished building my Raspberry Pi Matrix adapters from Rons holiday lights.

    -ronspimatrixadapter.jpg

    Cost is $5 for the PCB and $7.55 for the BOM. (+$3 if you want sockets).
    -matrixbom.jpg

    Each interface can drive 12 panels directly and it has a 5V power header to power the Pi.
    https://ronsholidaylights.com/raspbe...atrix-adapter/

    Forum thread on Matrix adapter.

    The $35 for a Raspberry Pi saves you $20 over the BeagleBoneBlack solution. Just an option...

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    Registered User Tripplett's Avatar
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    Default Re: P10 Panel Engineering

    Quote Originally Posted by FrankP View Post
    Finished building my Raspberry Pi Matrix adapters from Rons holiday lights.

    Cost is $5 for the PCB and $7.55 for the BOM. (+$3 if you want sockets).

    Each interface can drive 12 panels directly and it has a 5V power header to power the Pi.
    https://ronsholidaylights.com/raspbe...atrix-adapter/

    Forum thread on Matrix adapter.

    The $35 for a Raspberry Pi saves you $20 over the BeagleBoneBlack solution. Just an option...
    That looks great. 22 pages of posts is a lot to read through. So with a higher refresh rate will their be less flicker or does that just let you drive more panels off of each port? How much was the board from OshPark and is there a discount for like 5 to 10 of them or does that kick in at higher counts? I'll start reading the 22 pages today so maybe I'll answer my own questions...

  10. #25
    Registered User FrankP's Avatar
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    Default Re: P10 Panel Engineering

    I would suggest that you dont need to read the 22 pages of posts. ;-)

    The higher rate does reduce flicker and also support up to 12 panels per port.

    The cost on OSHPARK does not go down. Ron has boards on order. $5 per board is a good price (includes shipping).

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    Registered User Tripplett's Avatar
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    Default Re: P10 Panel Engineering

    Summary of what I found from the 22 page thread on this Pi adapter for P10 panels:
    Higher refresh rate so less flicker on the Pi > P10 setups. However as you add panels to the Pi the refresh rate drops. Max panels appears to be 12 per output, higher than the BBB per output but less overall. The Pi only has 3 output ports (36 panels total) where the BBB has 8 and can support 8 per port (64 panels).

    PI has all of the signal lines buffered to 5V, the beaglebone only buffers the control signals (clk, enable, output enable, A, B, C, D).

    Pi drives 12 panels per output, beaglebone is 8.

    Pi has 3 outputs versus 8.

    Pi supports 4-1, 8-1 and 16-1 scans, beaglebone 8-1.

    Pi output clock is higher (20Mhz measured, versus 1Mhz ledscape writeup). The higher clock rate should allow improve the on duty cycle time, support higher color depths, and drive more panels. The author in the first posts claims that you can comfortably drive 32 panels per output

    E1.31 and USB/serial channel outputs can still be used when driving the LED panels.

    Link to buy the board: Rons Holiday Lights PCB sale

    Link to buy the BOM: Online Ordering | Digi-Key

    If you want you can add to the BOM standoff and two screws.
    1 - Standoff 0.375 long 4-40 screws (Digikey #36-1892-ND )
    2 - 4-40 screws 0.25 inches long (Digikey #36-9900-ND )
    Or screws of your choice at your local hardware store.

  12. #27
    Registered User FrankP's Avatar
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    Default Re: P10 Panel Engineering

    Joe,

    Thanks for the detailed analysis.

    Frank

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    Registered User koi_plumber's Avatar
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    Default Re: P10 Panel Engineering

    Thank ya'll for the sessions and forum threads; I have a simple mind that can re-purpose existing stuff for physical static displays, so for technical stuff like this, I will always be a follower.

    I've finally started this project.
    Received:
    - P10 panels - 8 panels.
    - beaglebone black

    Ordered, in processing:
    - mounting brackets (BoscoyoStudio.com)
    - 5v power supply.
    - octoscroller.

    Figuring out:
    I plan on this being a stand alone message board, do I really need to figure out network separation or just put a clock on it and let it be 'stand alone'?
    The idea to link it so you can update message on the fly is something I eventually would like to do. Even thinking about putting on the weather bug.


    Will figure out/build the enclosure once I have panels and connectors.
    Ross Shotts (100,000+ light total)
    www.lights4paws.com



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    Registered User FrankP's Avatar
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    Default Re: P10 Panel Engineering

    Joe, what would you recommend when using more than 8 panels (say.. 12). I have a 3 across x 4 down configuration... should I break it up into two sets of 3 x 2 using two outputs on the OctoScroller? Or would it be better to do four sets of 3, based on the upcoming changes to FPP? What are they changing? can you please provide a link.

    Thanks!

    Frank

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    Official Lurker ronald.emery.18's Avatar
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    Default Re: P10 Panel Engineering

    It really doesn't matter. I
    generally use one output per row to help keep it simple.
    FPP I believe is updating the code so the refresh rate will be based on the number of panels used and not based on the maximum of 64 panels

    Sent from my SM-G920V using Tapatalk

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