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Adafruit 32x32 RGB LED Matrix
#1
Researching my next project (well, I just ordered the last 4 Allpixels in Australia, so maybe it is passing beyond just research...) 

I was looking at the Adafruit 32x32 RGB LED Matrix (https://www.adafruit.com/products/2026) but based on my reading, this panel has too many pixels for AllPixel to drive, would this be correct?  Huh  At USD $50 for the panel, it's price was looking good...

My fallback plan was to look at using 4x(8x32) displays, but I wasn't sure if:

a) I wanted to burn all four of my soon to arrive AllPixels on a single project;  
b) A Raspi2 was going to be able to drive 4 of them with interesting (read: possibly CPU intensive) animations; and
c) I wanted to spend USD $400 on 4x of those matrices.. I was looking at the Neopixel or the DotStars to build a 4x(8x32) display, but for the same pixel count, it comes in at $8x the price of the 32/32 display...  Yes, that is USD$400 for 4x of these puppies... Sad  

Fallback plan for the fall back plan was to look at only using 2x (8x16) displays and scaling my project down, but adafruit doesn't stock any decent sized 8x16 matrices.. I looked but it seems the http://wyolum.com/ TiMs are out of stock at seedstudio...

Thoughts / Suggestions sought... what panels are others sourcing for large matrix fun?

Cheers.

snrkl
#2
The AllPixel cannot drive those panels, but not because of pixel count. Instead because they are a *completely* different type of LED panel. You can, however drive them with BiblioPixel and a teensy... checkout our instructions here: http://maniacallabs.com/2016/06/28/jumbo1k-32x32-led-networked-display/

I'll ask Justin from WyoLum about the stock of their panels which can use the AllPixel. Their's are the best I can recommend.
Though, if you are doing a really high pixel count, yes, go with the 32x32 type of panel you originally mentioned and follow the link for how to drive them.... driving more than 1 however is complicated. What total resolution are you hoping for?
#3
(08-29-2016, 10:54 AM)Adam Wrote: The AllPixel cannot drive those panels, but not because of pixel count. Instead because they are a *completely* different type of LED panel. You can, however drive them with BiblioPixel and a teensy... checkout our instructions here: http://maniacallabs.com/2016/06/28/jumbo1k-32x32-led-networked-display/

I'll ask Justin from WyoLum about the stock of their panels which can use the AllPixel. Their's are the best I can recommend.
Though, if you are doing a really high pixel count, yes, go with the 32x32 type of panel you originally mentioned and follow the link for how to drive them.... driving more than 1 however is complicated. What total resolution are you hoping for?

Desired Resolution is a function of $cost and $surface area..  I want to do cool animations in a picture frame. Ideally the 32x32 looked good, but I am keen to leverage some of the the 4 Allpixels I just ordered!

Perhaps I will have to wait for the TiM to be back in stock... Sad 

A quick look on AliExpress shows me a couple of APA102 displays that look interesting:

P20mm addressable APA102 full color RGB indoor LED Display unit panel,14*14pixels,280mm*280mm;Aluminum plate (https://www.aliexpress.com/item/P20mm-addressable-APA102-full-color-RGB-indoor-LED-Display-unit-panel-14-14pixels-280mm-280mm-Aluminum/32645375716.html)

P10 APA102 full color RGB indoor LED Display unit panel,28*28pixels,280mm*280mm;Aluminum plate (https://www.aliexpress.com/item/P10-APA102-full-color-RGB-indoor-LED-Display-unit-panel-28-28pixels-280mm-280mm-Aluminum-plate/1998114424.html)

So I guess Adam, my initial query of max number of pixels supported on a single AllPixel, would the 784 pixels on the second matrix listed above be too much for a single allPixel to drive?
#4
The max matrix you can do with the AllPixel is 26x26 (sqrt of 700, rounded down) since 700 is the max pixel count it supports... well, actually it's 690 for the APA102, but the answer is still 26x26, so that last display would be too big. You could do smaller displays split across multiple AllPixels though.


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