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Thread: Neopixel Help!!!!

  1. #1

    Default Neopixel Help!!!!

    This is my first Neopixel run. Is am using a Nano Bisc v4. Neopixel strings with the 470 ohm resistor on the data line. I followed the same directions from KR sabers video. Using the TCSS wiring guide for Neopixel/LED string setup.
    My issue is that after everything is soldered the anticipation rises and all of a sudden, only one string lights up. So half the blade is dark while the other lights up. I believe it is soldered correctly if one is lit up. I donít know if the other string is bad. But I canít figure out why the second string is not lighting. Any help will be much appreciated. Please.

  2. #2

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    Neopixel strings are directional. Did you align them correctly? There should be a little black arrow on the strip it indicate direction.
    Also double check that the positive and negative on the strip that is not working is on the correct pads (since the strips are back to back, and hopefully orientated in the correct direction, the + on one strip is opposite on the other).
    Page 28-30in the NB4 manual.
    On the aidafruit website about neopixel strips, they also suggest wiring in a large capacitor to help with initial current rush (that could be bad for the pixels). I donít know if that applies here, as you are using a battery, rather than direct (house) supply.
    Last edited by bigkevin61; 12-20-2017 at 11:04 PM.

  3. #3

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    Have you got the right number of pixels set in the config file?
    Its just the number on one side of the two strips, not the total of both.

    Failing that, and assuming you've got the strips going in the right direction, perhaps desolder and resolder - or desolder then solder just to the strip that's not working to make sure its not dead.
    And yes, there should be a 470ohm resistor on the data line and a single 470ĶF electrolytic capacitor wired to the pos and neg, preferably as close to the start of the strip as possible.

  4. #4

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    Quote Originally Posted by RarestSquirrel View Post
    Have you got the right number of pixels set in the config file?
    Its just the number on one side of the two strips, not the total of both.

    Failing that, and assuming you've got the strips going in the right direction, perhaps desolder and resolder - or desolder then solder just to the strip that's not working to make sure its not dead.
    And yes, there should be a 470ohm resistor on the data line and a single 470ĶF electrolytic capacitor wired to the pos and neg, preferably as close to the start of the strip as possible.
    Yes, I have it set on 140. On one of the sound banks I have the color set on purple but it goes all white. I donít know if that tells any body what the problem is or if that information can help in solving my one side dilemma. I will check to see if the polarity is going on the same direction. Iím sure it is as I followed a video done by Khal and I knew about the polarity and the direction that they need to go in.

  5. #5

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    If figured that. Just using a battery should not give such a rush on power. Especially just a 2400 ma 18650. Just baffling. Could be just something that I probably soldered incorrectly but I just don’t see it.

  6. #6

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    I have had a bad initial pixel in the strip fail me. If you have enough strip, cut out one pixel on the strip that isn't working. If that pixel was bad, the whole strip will follow. Re solder your wires to the new first pixel, and try again. See if that works.

    Tom

    "Let the past die."

  7. #7

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    Quote Originally Posted by Tom Tilmon View Post
    I have had a bad initial pixel in the strip fail me. If you have enough strip, cut out one pixel on the strip that isn't working. If that pixel was bad, the whole strip will follow. Re solder your wires to the new first pixel, and try again. See if that works.

    Tom

    Awesome!!!! Worked. Thanks Tom!!! Two out of the 3 sound banks work. For some reason one sound bank shoots the leds to a white like blade when I had it set for red. Has anybody heard of a sound bank issue?

  8. #8

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    For some reason, it keeps shorting out on red. Red will scroll up and then it flickers off with a scroll down sound as if it’s rebooting.

  9. #9
    Owner of the Custom Saber shop Strydur's Avatar
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    This is one reason to go with the 2813 vs 2812 strips as they have a redundant setup so if one LED is bad it will skip past it.
    Tim
    The Custom Saber Shop

  10. #10

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    Quote Originally Posted by Strydur View Post
    This is one reason to go with the 2813 vs 2812 strips as they have a redundant setup so if one LED is bad it will skip past it.
    Since this is new, everyone has stated different types of LED strips to use. So no perfect set up yet. It isn't until its turned on when you find all the problems. So it looks like there will be no red on this LED setup. The red works when you put it on mute mode. It will stay lit for about 5-10 seconds then its shut off. The speakers go crazy with like a static sound then reboots. like I need to put a capacitor for such a small battery(1860 2400ma). I have a lime Green with a pinkish FOC for sound bank one, Green with orange FOC for bank two and blue with a greenish FOC for bank three. I would like to thank everyones input and help


    Tried it and probably my last time with NeoPixels for awhile.Saber1.jpgSaber2.jpgSaber3.jpg

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