1. New to Christmas lighting? Get started with the AusChristmasLighting 101 Manual:
    auschristmaslighting.com/wiki/AusChristmasLighting-101

Troubleshoot Nodes

Discussion in 'The Development Lab' started by damona, Dec 30, 2018.

  1. damona

    damona Full Time Elf

    Joined:
    Oct 23, 2013
    Messages:
    283
    Likes Received:
    7
    Hi Guys,
    I have 4 wire nodes string, X nodes in and it stops working. However some times it must work for a few seconds or milliseconds and lights stay on above the nodes that are working and no not change until it works again for a few milliseconds. Which sort of indicates the data signal is having issues.

    I have swapped output cables from the control e.g. Move the issue string onto a different output, no difference.

    However tonight a colder night (few drops of rain), all the lights/nodes in the string are working find. The wires and square nodes are black so you can not see any of the inner working.

    Any thoughts on tools etc to use to solve the problem.
     
    Last edited: Dec 30, 2018
  2. AAH

    AAH I love blinky lights :) Community Project Designer

    Joined:
    Dec 27, 2010
    Messages:
    3,259
    Likes Received:
    352
    Location:
    Eaglehawk
    Find Me On:
    I have seen similar issues due to voltage and also a broken ground connection when there is power injection on the far side. I would try running the string as close as possible to the controller to see if the issue goes away, Measuring the voltage at both ends of the string might show if there's a power problem. Below about 9V on 12V strings and 3.5V on 5V strings and you will often see latching up of the pixels. This often requires the power to be turned off then on again to clear the problem. If there is a broken ground connection (or possibly even a broken 5V/12V) and you have power injection past that point then removing the power injection for the sake of the test will show up where the problem is. The pixels will work up to where the problem is.
     
  3. OP
    OP
    damona

    damona Full Time Elf

    Joined:
    Oct 23, 2013
    Messages:
    283
    Likes Received:
    7
    Turning off and on once did appear to solve it once. It looks like the same node is always the only last one to work (all the time) about 20 nodes in. i.e its in the first 1/4. The string is 5v.
     
  4. ezellner

    ezellner Apprentice Elf Generous Elf

    Joined:
    Feb 12, 2017
    Messages:
    63
    Likes Received:
    20
    Location:
    West Bloomfield, Michigan, USA
    Sounds like a bad pixel. It'll either be the last one that works or the first one that doesn't work. Many just replace both to be safe.
     

Share This Page