So, I've been working for a while on a shield for the arduino that has 2 8*8 led matrices on top. The first version didn't work too well, it was a ratsnest of wires. For v2 I decided to learn to use Eagle. I am proud since it is my first custom PCB! I had it made at BatchPCB, by the way.
Anyway, here's a video.
It's not too impressive yet, because I have only written a few sketches to test the functionality of it.
The matrices are driven by 6 595 shift registers, two of which are connected to ULN2803 sink drivers for the rows. Columns are driven through 330 ohm resistors. The reset button is broken out, and there are two jumpers for the Output Enable and Register Clear pins of the 595s. These are so I am able to control these pins thru software, but I can have them default to a value if I want to use the pins.
I'll be updating this as I make progress!