Thanks so much for looking over my board and improving it - it looks fantastic
I will definitely look at all your suggestions and improvements to incorporate in my future boards. I am using female header strips for the matrix to plug into and there is ample clearance for the 7219 but as for the mounting holes, I will have to mount the board and then plug in the matrix. I was trying for a small footprint and I only moved the bottom of the board outline down 2 mm from the lower matrix edge so the lowest trace on the top layer of the board would not be too close to the edge.
I also used viewplot on my initial board but for some reason the silkscreen was not showing up but your version shows it perfectly, so obviously I had the layers set up incorrectly. I ran the seeed camfile but it generated a different set of gerbers than what they require on their site. There again probably operator error - so much to digest. I might then have a look at Iteadstudio and see how I go there.Thanks again CR as always I appreciate your help
– If when I run the Iteadstudio DRC should I be concerned with the 48 errors. There are stop mask errors around the IC and the two 5 pin data/ power connectors and width errors with the top and bottom ground planes. Do I need to address these issues. Also on their website here
they specify which cam files they need but when I run their cam file generator it does not produce the GKO outline layer file. Thanks.