hi,
I have an 8x8 matrix that is "cathode row & anode column".
http://www.lc-led.com/View/itemNumber/339
It doesn't seem to work when I use zambetti's code and wiring following trialex's post. Some lights blink but it's not a diagonal line. Do I need a "common cathode" matrix? Is it possible to use the matrix I bought?
thanks,
greg