Hello! Sometime in January 2024 I bought a 64x32 led matrix and I started with an arduino uno and a 5v 3 amp power source. Now I have a arduino mega 2560 and have an 5v 10 amp power source.
I’ve done all the coding and triple checked it. Even used examples, I also checked all the pin connections 4 time…
Can anyone help me?
Not sure if it’s the board or something else.
With what?
Describe the problem. Show a wiring diagram. Show your sketch.
hello. the problem for me is my board glitches whenever I tell it to do something, what I mean is it turns on random leds all over the board and I have to press the reset button on my ardruino mega for it to even turn on...
i got the wiring diagram from jumper wire connections
and here's a picture of what the board looks like when I put code into it:
and I'm very annoying when i say this. I have only been using other peoples code that is recommend!
That is good to know, really.
Do you use a 1000uf electrolytic capacitor across Vcc and GND of the matrix? Also, do you use a 470ohm resistor from the Arduino data pin to the DIN of the matrix?
I like to write my first Matrix sketch to blink the first LED.
The second sketch I write is to light the corner LEDs.
Give those a try. It will help you know the LED numbering pattern.
If you need help with your sketch, post it here.
no. I'm new to the Arduino community but I understand the main pins etc.
I don't have either of those capacitors. do I need them?
thanks for the tip. ill try to find the code for that...
do you know of any examples on the Arduino IDE software that do that?
if not ill watch a few videos about programming a matrix with a mega, or I will look at other forums.
but if you have any idea where I could get that code please tell me.
Thank you so much for helping
Adafruit neopixel library examples in 'Examples'
The capacitor is important to stabilize power into the matrix, especially when many LEDs are turned on and off. The resistor helps the Arduino limit current through the data pin.
Thank you for all this info. I'm still a little confused on the capacitor and resistor you're talking about, if I do get those where would I put them on the matrix?
sorry and thank you once again.
Thank you, ill check, them out right now!
So, demos didn't work so must be something in wiring or the matrix itself right?
thank you!
Hmmm...
Now it seems maybe you don't have neopixels.
I got, "somehow", a collection of Examples -- 'RGB Matrix panel'. Still, it's adafruit.
To me these seem a much more complicated deal (not the same libraries as '2812 stuff).
Sorry.
Ahhh okay. ill figure something out....
I'm really stuck on this so anything helps! thank you so much.
RGB-matrix-Panel/examples at master · adafruit/RGB-matrix-Panel · GitHub
Overview | RGB LED Matrix Basics | Adafruit Learning System
There's a lot to get right, and a lot to go wrong, too.
Hey thanks! very new to this. so this is really nice.
do I need to change some code cause its a 16x32 and the other is 32x64?
These are RGBLEDs? Sorry. I thought they were WS2812.
Is there a sticker or data embossed on the back of the panel?
Is your panel RGB or monochrome? I think it is a P5..
Did iit ever occur to OP that you need a p5 control library to control a p5 panel?
Please post the code that does not work...
And show how the gray cable is connected to Arduino (schematic and photo).
hello. Sorry for late response
its a p5... is that bad or is it okay?
It is good. See post 18.
