Help needed for Rainbowduino 24x8 LED Text Scroller cascaded

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#1

Hello,

I would appreciate some help and maybe team up with others that look for same solution.
I am working on cascading single color led matrices ( each matrix is 24x8 - 192 - single color LED) to make a huge led text scroller for a low budget theater project.

The 24x8 Matrix is connected the same way as the “Rainbowduino Extension Board v0.9b” http://www.seeedstudio.com/depot/datasheet/Rainbowduino_Extension_Shield_v0.9b.pdf

Right now I am using the Demo Code from : http://www.seeedstudio.com/depot/source/Code%20for%20Rainbowduino_Shield_v0.9b.zip
There is no I2C or other protocol implemented yet.

QUESTION :slight_smile:
What do you think is the smartest way to make a single color LED “Sign Board” for scrolling text?
Has anyone implemented a text scroller with single color LED and cascading yet?
Anyone interested in helping with this project?

thanks
Chris
192matrix_cascading.jpg
192matrix_back.jpg
192matrix_front.jpg

#2

ping

#3

Hi Pal,

I think it’s not wise to use Rainbowduino to control mono-color LEDs, as it’s designed for RGB LEDs. In my own LED-POV project, I use shift-registers instead of use multiple MCUs with I2C communication. Anyway, check my PM first.

#4

Hi,

Why not create a cascaded 8x8 RGB LED Matrix solution.
You need a Matrix and RainbowDuino for each 8x8 RGB Matrix.
When you use one color you can connect 3 8x8 Matrix to one RainbowDuino.

Regards
Raoul

#5

Hi,
thanks for the reply. Yes, I am using one rainbowduino connected to 3x 8x8 single color LED matrix. As seen in the pics.
My problem is that I do not know how to modify the examples to support this 24x8 LED matrix when scrolling text. All examples always use a 8x8 RGB matrix.

If anyone can help or provide sample code?

thanks
Chris