I have a charlie-plexing FAQ at http://wiblocks.luciani.org/FAQ/faq-charlie-plex.html
I also make an 8x8 and 10x10 and circular board that uses charlie-plexing. The schematics
are in the datasheets. The information on the 8x8 board is at Loading...
Information on the software is at Loading...
You may be able to adapt the schematics and software to work for your project.
(* jcl *)