Still have any available? Would love to get one shipped to the US.
If we want to put three together, how do we daisy chain them?
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Youād just need one shield, and hook the panels up with ribbon cables ([Shield on fist IN -> OUT] -> [IN -> OUT] -> [IN - OUT open]) and supply voltage to each of the panels.
And set the āscreenā width accordingly - if you donāt, youāll just get a cloned display.
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@avidan, @ScruffR is correct. The shield power connector can handle 5 Amps so it will not be enough to power all panels. As such, each panel will need its own power with a common power GND shared between panels. The display width can be set when you create the RGBMatrixPanel ojbect:
RGBmatrixPanel matrix(A, B, C, D,CLK, LAT, OE, true, 96); // 96 wides x 32 high
Panel refresh rate will be impacted. Let me know how it works if you try it! 
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awesome! where is the best place to buy more panels and power supplies
@avidan, Particle has a bunch in stock (80 or so) that they have not put up in the store. Iām sure they could sell you some if you ask! These are the Maker Faire 2016 RGB Matrix Panel kits. 
And the longer ribbon to connect panels? or are they some standard cable?
Seems like a regular 8x2 ribbon cable.
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Hey there ā I was wondering what the arrows are for on the back of the panels? Iāve mounted them with the arrows facing downwards, is that okay or will I need to do something to rotate the display? Thanks!
I believe theyāre supposed to point upwards, which would give you the 0,0 at the top left corner. If mounted differently, youāll have to adjust for that in code. Rotating the panel might be easier, if possible 
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Folks, I updated the RGBPixelClock library in the IDE to add a new rainbow clock. Enjoy!
No photos?
A tree fell in the forrestā¦
why the common GND?
and can i use a depopulated shield to go from barrel jack to 4 connector? even if there is no particle mounted?
this thing is AMAZING @peekay, you rock.
before we share what we have built, is there a way to upload an image to scroll? whats the easiest way to get it scrolling using your example firmware?
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@avidan, Iām assuming you answered the first two questions for yourself (?). @Dave wrote some code for Maker Fair for the slot machine simulation that did some cool scrolling. Essentially, he created an image buffer in RAM which he then ātranslatedā to the display buffer to create the effect. I canāt seem to find his code but maybe he can hear my call 
If you callā¦ I will answerā¦
Hereās the code for the roulette screens:
Hereās the code for the triggering button:
This app reads a handful of images from the SD card, arranges them into a buffer, and then when it receives the triggering message / event, will spin with a nice easing function. Itās meant to be used on 1+ displays all right next to eachother, and the message is meant to contain the final position each screen should land at.
The button controls the game, and decides semi-randomly if it should generate a winning outcome, and the chances of winning get better as you approach the end of the game time period.
Enjoy!
David
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