64x64 LED Matrix not displaying Properly. Split image

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

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ChickenFries
 
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64x64 LED Matrix not displaying Properly. Split image

Post by ChickenFries »

Hello. I purchased a 64x64 LED Matrix and a Matrix Portal M4. However it appears that only half, in two separate strips, are working. The others are completely off or light up extremely faintly. I am still a novice learning about these LED matrices and microcontrollers so please bear with me if its a silly mistake.

I firstly followed the instructions to prep the Matrix Portal and this video for connecting to the LED Matrix. Ensuring to solder the E line jumper to pad 8.

However you will see in the photos and video that not all the LED appear to be responding correctly. This was happening since I first plugged everything in. The preloaded RGB sand demo also showed this. I had thought that this was because the default demo is intended for 32x64 and needed additional setup but still seemed strange.

Additional photos and video

I then tested the below projects and got the same results. If needed I can get additional photos of these running as well.
Animated gif display
Clock

I also found a similar thread from back in April
Am I missing something or could this be a defect?
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ChickenFries
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by ChickenFries »

I have tried with this further using the test code here: https://github.com/adafruit/Adafruit_Ci ... atrixPortal and here

Unfortunately still seeing the same results. I also added photos to the same link above. The text position can be moved up or down so that it shows fully but you still see the ghosting effect on other rows. Seems something is wrong in LED Matrix leading to those "pixels" ? I have reseated each cable multiple times and re-soldered the E-Pin with no change. Any thoughts?

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ChickenFries
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by ChickenFries »

Can anyone help me here? These parts seem to be defective....

I emailed [email protected] about this issue on Jan. 5th. I received no response.
I followed up on the email on Jan. 12th and was told by Ben from the support team that he alerted his team to this forum post. He said I should have a response "shortly."

It is now Jan. 19th and I still have no response on this forum post or to my email with support.

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adafruit_support_carter
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by adafruit_support_carter »

Ensuring to solder the E line jumper to pad 8.
Please post a photo of this solder job. Let's double check that to make sure it's OK.

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ChickenFries
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by ChickenFries »

Hi Carter,

Photos on the links below

https://i.imgur.com/AQre7sW.jpg
https://i.imgur.com/qKa8AN1.jpg

Thanks!

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adafruit_support_carter
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by adafruit_support_carter »

Thanks. That looks OK.

The sand demo and the other examples assume a 32x64 matrix. So let's check that next. It sounds like you already tried running this example:
https://github.com/adafruit/Adafruit_Ci ... pletest.py

Try that again, but change these lines:

Code: Select all

matrixportal = MatrixPortal(
    url=DATA_SOURCE,
    json_path=DATA_LOCATION,
    status_neopixel=board.NEOPIXEL,
)
to this:

Code: Select all

matrixportal = MatrixPortal(
    url=DATA_SOURCE,
    json_path=DATA_LOCATION,
    status_neopixel=board.NEOPIXEL,
    width=64,
    height=64
)

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ChickenFries
 
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Re: 64x64 LED Matrix not displaying Properly. Split image

Post by ChickenFries »

Hi Carter,

Thank you for this help. I can confirm that with the code change you mentioned the output for that project now displays properly :)

Images of before/after code change
https://imgur.com/a/SHXlrB4

I was also able to get a some of the other tests working as well.

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