I have a 32x32 LED panel (14646) from SparkFun that I don’t seem able to control. I was following the tutorial below, but none of the examples in the RGBMatrixPanel library seem to work. I’m using an Arduino Mega and a 12V/5V power supply as mentioned in the tutorial. When I try to run the “testshapes_32x32” code in the examples folder, I don’t seem to get any degree of control over the LEDs- a random pattern shows up as shown in the image below, and it never seems to change regardless of what I do. I can unplug all 6 RGB pins with no change in the display (plugged into 24-29). I have also tried swapping the Arduino Mega for another with no effect.
https://learn.sparkfun.com/tutorials/rg … okup-guide
I tried rewiring the display to a raspberry pi as well using the github library for the led panel below, but I got the same result of a non-controllable panel. This rewiring required me to change all the jumpers I was using from male-male to male-female, so I don’t think it’s a wiring issue. Does anyone know of something I can check for this, or is this just a bad panel?
https://github.com/hzeller/rpi-rgb-led-matrix
Hi, you can see some random patterns, right? Usually, if the display is bad, the LEDs do not glow at all. But it is also possible that the display is damaged only in some particular columns and rows. You can try different examples to figure out if any row or column is always off. Also, check the continuities of your jumper wires. If there is no improvement or no clue about what is happening, I think you’d better mail SparkFun for a replacement.
In the meantime, if you consider something more basic, you can take a look at this: https://www.theengineeringprojects.com/ … -isis.html
Unfortunately, I don’t see any rows or columns that are bad- Every led can turn on at the same time. I tried all the examples in the Adafruit library, but I didn’t get any different results on any of them. I checked the wires I had, and they seem good- that’s why I’m kinda thinking it’s a bad panel.
Did anyone from the Sparkfun team contact you? If not yet, I think you’d better mail them regarding this issue.
Head over to www.sparkfun.com/returns and fill out the short form if purchased from us and we’ll get you taken care of - if bought from a 3rd party vendor, simply contact them for similar
I am having a similar issue with the larger 32x32 6mm panels purchased from SparkFun. My company bought 16 to make a large display board but I cannot get any of them to work. The smaller 32x32 panels work fine (see attached pics), running the exact same program. I have a hp 4Amp power supply so no issues with power. I’m using a Raspberry Pi 4 with the Adafruit RGB matrix hat and the hzeller/rpi-rgb-led-matrix program. Anyone have any ideas, or should I return these? Are there any alternatives (similar physical size – not too concerned about whether 32x32 or 64x64 pixels – the panel size is key)?
Part Nbr on back of large panels: P6-3528-32*32-16S-HL1.1 (not working)
Part Nbr on small panels: P4-2121-16S-HL1.0
It sounds like there might have been a few bad batches from a supplier- I haven’t been able to get the ones I have to work either. I haven’t seen any other suppliers, but I’ve had decent luck with this surplus site in the past- It’s not exactly what you’re looking for, but it seems close
https://www.goldmine-elec-products.com/ … ber=G26194
