19 Comments

  1. [...] Of course there were a few prob­lems, mainly with the long cable (11 meter) and the SPI sig­nal. You can read more about this on a pre­vi­ous Blog post here and here. [...]

  2. morten
    morten March 23, 2013 at 13:51 . Reply

    hi

    can you help me , i have two led stripes with lpd6803 one is rgb and one is bgr when they are connected , is there a way to convert signal from rgb to bgr that both are the same when connected..

  3. demi
    demi May 2, 2013 at 22:14 . Reply

    Hi,
    maybe (hopefully) you can help me.
    I have 4 panels a 100 pixels of WS2801 LED which I want to control with my arduino uno or my teensy 2 (or 3). I have 2 power supplys, everyone with 2 rails (http://tinyurl.com/d2fkgzb | http://www.amazon.de/gp/product/B005SNIB96/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1), for each panel 1 rail. If I connect only one panel it works fine, as soon as I use 2 the pixels gone mad or event dont do anything. I am sure its because of the connection of the ground cable. I read a lot of posts in forums and they always say I have to combine ground, so I am really confused and frustrated :(
    Would you please take a look at my wiring and give your comments? Sorry for the bad illustration, I didnt find my detailed one..
    http://www.pixelfahnder.de/verkabelung.jpg

    Thanks so much in advance and keep up the work!! Your blog helped me alot with my project!!

  4. demi
    demi May 3, 2013 at 08:36 . Reply

    additionaly to the other ground cable or should i use only the connection between the clusters?
    Last night some guys told me to update my Ground wiring to the following settings:
    http://www.pixelfahnder.de/Updated_Schaltplan.jpg
    But still same result

  5. Michael
    Michael July 25, 2013 at 16:45 . Reply

    Hi Michu,

    Thanks for all the information, it is very usefull. But I have some questions:
    The SPI Driver mentioned at point 4 isn’t used at all to get it work? So you only put the 1kOhm resistor between CLK and DATA (Only at the beginning?) and lower the CPU speed and then it all works as aspected? I have started a project for garden lights with WS2801 ICs and I am trying to make a correct set up for the long distance, but kind of new with this part of electronics :)

  6. Joe markin
    Joe markin November 14, 2014 at 17:18 . Reply

    we find a device named SPI/TTL signal receiver PCB, its accept distance is 200m. here is details: http://www.greeled.net/ttl-spi-signal-receiver.html

  7. Zack
    Zack August 21, 2015 at 16:12 . Reply

    Thanks for this post it was very helpful! My lights were working most of the time but flickering randomly at other times especially the 5m strips farther down the strand. I believe my issue was with the common ground by trying to ground it to the original source rather than keeping it in series with the previous circuits.

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