Hello Riva,
After several hours around the build of the matrix (mine is 475 x 475 mm), I've just managed to see the result of half of the matrix (just one MAX completely connected by now).
The result is not what I was expecting. Without thinking or questioning, I used the diagram presented in the file "Clock7.pdf" to wire the first max to the arduino and as I can now see, my assumption was not correct.
Here is what I have done:
Since we usually read from left to right, I supposed that since you placed the IC1 at the right side of IC2, the schematic was drawn as seen from the back, i.e. when you see the watch from the front, the IC1 becomes the left and the IC2 on the right; and I wired my matrix exactly as in the schematic. At the moment, only the IC1 that, seen from the back of the watch, it is on the right side (right half) and when we turn around to see the "lights", it is on the left side.
Well the problem is that I missed something and now I have the initial string appearing from the left to the right (wrong) and, even worse all the characters are backwords (like mirrored). To see the characters correctly, I would need to turn around and see the watch from it's back...
(I hope my explanation make sense).
So, the question is: Can I "fix" my matrix without the need of rewiring everything?
What is the correct way to build the matrix?
(I can upload a little video to show you the problem)
Thank you for any help.