I found these KOMANI Gaming Machine LED boards surplus for $20 for a set of five. I thought it would be a fun project to sort them out ans see if I could get some software to blink them. I reversed Engineered the board and found they use Three STP16CPC05 Serial in Shift registers with programmable current limiting. I've included the schematic in the zip file. If you need to expand outputs these chips work very well and have the capability to drive LED's directly in a 20 Pin SSOP Package' The interface is simple just Clock, Data, and a Latch Enable Bit. The outputs are not affected while shifting data in and are transferred with a Latch Enable pulse. I tested the board at 8 Mhz, 32 Mhz, and 64 Mhz with a 18F45K22 and it works at all speeds. I'll attach some pictures of timing at 64 Mhz. A fun little project. More pictures in the zip.

Thanks for Looking Dick

Rev-02 2014/08/27 added a couple tests and cleaned up the source to eliminate
all the lables Main_xx to something that relates to the test in progress
Made turning OFF all the LED's a Sub Procedure and included some const's
for describing the numbers I had in the source. Also made a dummy test
at the end for the next test I haven't thought up yet.

I also have three of the boards daisy chained now.

This version is a much smaller ZIP file because I removed the DOC's folder and put it on the ONE Drive here

https://onedrive.live.com/?cid=AE67FFF392766057&id=AE67FFF392766057%215774

But it hasn't changed from the original. Now you can download only the files in the DOC's folder you want.

Thanks For Looking

Dick

I added a couple more tests in Rev 3.0 and made a Video. You can view the Video here.

https://www.youtube.com/watch?v=Uq11tz4TwSY

Thanks for Looking

Dick