I've been struggling getting the light matrix to run properly, since all rows are for some reason active at the same time. I'm thinking the ULN2803a is broken, so I've ordered a replacement. The ULN activates by pulling the row TIP107's to ground, which seems likely in case of a short circuit or similar. We shall see.
On the other hand - input and output are all up and running and running "very often". I haven't crunched the actual numbers, but it should be in the 500-600Hz range at least. The graphics are a rock solid 60hz (or so, there's no noticeable blinking which would suggesting a minimum of 50hz ) and it doesn't matter if the drawbuffer takes 1 second to create itself, it won't affect solenoids, switches or graphics etc. This means I can most likely use several layers of DMD animations, for instance, one background and one foreground. Should be pretty wicked!
|1) Here's a snapshot of my Enterprise Commercial Grade Ultra Deluxe Setup 2000. Still, the various shades|
does make a huge impact on the graphics. Looking forward to getting SD card animations up and running!
Overall I'm very pleased with the progress thus far!