For the Dot Matrix Displays I am using four 24×16 displays from Sure Electronics.
They have a number of boards to choose from. Although I originally purchased my boards from their EBay store, they have their own website as well:
Since I purchased these boards a couple of years ago, Adafruit now carries a very similar (red LED) chainable board:
What’s great about Adafruit is they not only provide a tutorial on how to use the boards, but they provide Arduino code as well.
I found my original code to control the Sure Electronics displays from a user on the web. He had already created a C# .Net version of another user’s C code.
As I now needed to control the boards from an Arudino I first tried the Adafruit library with the Sure Electronics boards. It turns out that the two company’s displays are very similar, and there is just a slight mapping difference in how the code needs to address an invidual LED (pixel) at any particular x,y coordinate across the displays.
I will detail the difference a bit later.
Here is a picture of the four chained displays connected to an Arudino UNO displaying scores:
24 X 16 2416 Green LED Dot Matrix Display Information Board HT1632C