Once again long time between posts.....but we have progress.
I have obtained a USB to Serial adapter and have now tested connecting the TX of that to the RX of 2 Arduino's. This is what I have been banking on the whole time and it worked perfectly. Each Arduino waits for an assigned start byte and then acts on the bytes following the start byte. It then counts the bytes until it has a full module worth and displays them. The next start byte is received by the next Arduino and the sequence is repeated. This is how I plan to scale up to having 4 Arduino's working together, each controlling 2 DMD's. Thereby giving me a 64x64 resolution LED video screen.
I have ordered more panels (10 infact) and I am waiting for them to be delivered. Once I have them I will be attempting to scale up to full size.
In the mean time have a look at the 2 videos below. I used my camera phone and it is not great at capturing the LED's as they are quite bright. So I apologize for the image quality.
Hopefully in the coming weeks I will be able to show you the 64x64 in action.....I hope you like the colour GREEN!!!