Noob needs help with their setup

[oryz0]

Hi community!
I'm a passionate noob trying to learn electronics, and I've spent many hours trying to solve my issues on my own. Now I'm reaching out to you:
I've purchased 3 LED panels 64x32, Raspberry Pi 4B, a 5V 15A power supply, and 1 Adafruit HAT.
I've carefully followed the guide provided on the website, but I can't seem to display anything other than glitches and color bands like in the photo :

However, my Raspberry Pi seems to be sending information to the LED panels properly.
I bought a LED-matrix controller thinking that the problem might be with the Adafruit HAT.
What could I have done wrong? Bad wiring? Incorrect commands?
Thank you in advance for your invaluable help!

[davemaster]

Before I help You, I think you must spend a couple more of hours reading the guide, right?

Then, keep in mind this; read, I mean, READ carefully the Adafruit guide of your HAT, this link in a single page.

In some cases, the rpi-rgb-led-matrix is compiled for "regular" wiring, but you need to set "adafruit-hat". Also, You need to try (if You don't know already) --led-multiplexing=0..to.. 19 (the type of your RGB Panel), and slow the GPIO in your RPi 4, --led-slowdown-gpio=<0..4>, then use in demo as follow:

sudo ./demo -D 0 --led-gpio-mapping=adafruit-hat --led-rows=32 --led-cols=64 --led-chain=3 --led-no-hardware-pulse --led-multiplexing=1

It doesn't work yet? Another hour of reading, soon you get the right parameters, keep trying --led-multiplexing with other values until 17

Best Regards

[oryz0]

Hello !

Thanks a lot for your help. I read the guide several times. I didn't weld the HAT, so I focused on making the connections.
Once I assembled all the components as described in the guide, I unfortunately got stuck at the same point.
I applied your code line with all possible led-multiplexing and slowdown GPIO combinations.
The information is sent correctly, but nothing is visible.
In my previous photo, I think it was just an electrical issue. I saw this line error before unplugging the GPIO pin.

In the guide, I saw the instruction to weld jumper “E” to pad 8, but there is very little information about values 8 and 16. I don't know what information to look for in my panel settings since they don’t come from the Adafruit shop. To be safe, I welded jumper 8 as described in the guide.

Another detail is that there was a short circuit in my first assembly at the right GPIO ports. This is why I bought a new LED Matrix controller, thinking I had damaged my HAT. However, the commands don’t work with this controller either.

The guide is very clear, and I followed it carefully. Now I don’t know what to do to fix my setup.

[davemaster]

Would be great if You share your command, the picture of your output (video, better), also tell us, the Rpi are You using for this project: RPi 1, 2, 3, 4.... (Rpi 5 is not compatible yet)

Thanks in advance.

This ALWAYS works: wire your project, using the REGULAR [1] (in the wiring guide), then, with a PROPER POWER SUPPLY (5V 5A, at minimum) test demo

[oryz0]

Hello, ok I have a RPI 4B and 5v 15a alimentation
Where can I find REGULAR[1] in the wiring guide ? I don't see on this page
I make video :

Led_Pannel_Issue_1.mp4

Thanks a lot for your help

[davemaster]

Hello, ok I have a RPI 4B and 5v 15a alimentation Where can I find REGULAR[1] in the wiring guide ? I don't see on this page I make video :
Led_Pannel_Issue_1.mp4

Thanks a lot for your help

BUT YOU FORGOT to share the output in RGB Panel of each command....

I note you feed the 5V to panel FROM Adafruit HAT; no, feed power from the power supply directly, I AM NOT SURE if the panel supplies enough current to panel...

Waiting your RGB PANEL OUTPUT in video... I will be all night long working...

[oryz0]

I think it is not important to share the output because nothing appears on the LED panel. I have tried to feed power directly to the power supply, but there is nothing there too. I know it is annoying to help an inexperienced person. Thank you for taking the time to help me.

[davemaster]

I think it is not important to share the output because nothing appears on the LED panel. I have tried to feed power directly to the power supply, but there is nothing there too. I know it is annoying to help an inexperienced person. Thank you for taking the time to help me.

well, if you went so far filming that video, a little seconds more.. BUT, if NOTHING is showed in the panel.... YOU MUST FIRST, check your:

1. POWER SUPPLY, TRY WITH ANOTHER... for 64x32, 5V 5A at minimum
2. Check YOUR CONNECTION, use the REGULAR in wiring, for my 64x32 panel, I have NO NEED to do some hack/mod to my Electrodragon RPi adapter, (but yes I need for another 64x64 32S panel)