Thanks for the picture, that's very helpful to know those lengths are possible.
I have read in other Arduino-Forums that a lot of people have had problems with "cheap China" MAX7219 units, exactly like the ones I have. My wiring should be correct, as the same units start working once I cut the exact same wire down... however I am using non-shielded 0.14mm (26AWG I blieve) wires for testing.
Why are you using 8 signal wires? We have used +5V, GND, D (#28), L (#27) and the CLK which goes straight to Pins #30.
I read in the forums that people have had problems with the termination of the signal and ground wires... do I have to run those lines back to the board to create a "closed circuit"? When daisy-chaining the D and L lines, can I use the outputs on the other side of the PCB? They are labled DOUT, and LODA. I have read all your documentation and it makes perfect sense to me, however we still run into these problems. Hope you can tell me what's the best practice to wire those up. Will be using Multiplexers later on, for now I am using direct connection to get a "Quick and dirty" MCP running for testing
Thanks Vlad, you are doing an awesome job here :)