RGB LED Matrix Cube

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HellRacer63
 
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RGB LED Matrix Cube

Post by HellRacer63 »

Hello from Germany,
I started building the RGB LED Matrix Cube and now I have a problem.
I did everything according to the instructions, everything is still fine with the colored rotating square. each matrix works perfectly. It starts at the point (all 6 matrix panels) where the lettering Hello World runs through, from the 3rd matrix the picture wears out. Then I installed the next software to try again. I have the same effect everywhere with the consumption (e.g. with Minecraft image), where it starts with the 3rd matrix. The black bars are just from my camera, ignore them.
may have someone a solution to the problem?
Thanks in advance
Greetings Volker
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Cube.jpg
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adafruit_support_carter
 
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Re: RGB LED Matrix Cube

Post by adafruit_support_carter »

What model Pi are you using?

Did you choose quality option when installing the software?
https://learn.adafruit.com/rgb-led-matr ... ware-setup
And make sure to add the solder bridge and and the jumper wire?
https://learn.adafruit.com/rgb-led-matr ... 3dh-wiring

When you ran the Hello World! test, you used the exact command?

Code: Select all

sudo ./scrolling-text-example --led-rows=64 --led-cols=64 --led-slowdown-gpio=4 --led-chain=6 -f ../fonts/texgyre-27.bdf Hello World!

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HellRacer63
 
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Re: RGB LED Matrix Cube

Post by HellRacer63 »

Hello,
First of all, thank you for your attention.
As I said, I followed the assembly instructions and used the parts that were given.
Raspberry Pi 4B with 2GB, Adafruit RGB Matrix Bonnet, LIS3DH.
The panels are identical in construction with ABCDE addressing, as they were not in stock.
Everything was soldered according to the instructions. Since I bought everything twice to build 2 cubes, I can swap the parts with each other, but this has always caused the same effect so far, square works with all panels, but as soon as I connect 6 panels in a row, the consumption effect goes from panel 3- 4 go.I would be interested again why gpio4 and 18 are bridged, maybe I should solder the bridge again and again, although I think everything is OK. I took a few pictures
Greetings Volker
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0.jpg
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5.jpg
5.jpg (147.84 KiB) Viewed 153 times

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HellRacer63
 
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Re: RGB LED Matrix Cube

Post by HellRacer63 »

I see,
I did copy and paste at hello world Text
also by the other examples
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smoothly rotating colorful square
smoothly rotating colorful square
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adafruit_support_carter
 
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Re: RGB LED Matrix Cube

Post by adafruit_support_carter »

Just to verify (can't tell for sure from photo), this wire is soldered to the Bonnet?
solder.jpg
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HellRacer63
 
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Re: RGB LED Matrix Cube

Post by HellRacer63 »

If you see on the other photo it is on the backside, but I will soldering out the bridge and make it new on one of my two bonnets and testing

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Re: RGB LED Matrix Cube

Post by adafruit_support_carter »

Oh yah! Thanks. Sorry. Missed that angle.

This may just be a soldering issue. The photo is a little out of focus, but some of the pins may be cold soldered and not wetted out enough on the pads. See here for ref:
https://learn.adafruit.com/adafruit-gui ... n-problems

The E8 jumper and the GPIO 4 to 18 jumper all matter. But also the ribbon cable connector. It could be even just one pin on the 2x8 ribbon cable header connector.

Try going over all solder connections and make sure they are good. Reflow any that seem not wetted out adequately.

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