Reply 50580 of 56708, by eesz34
This was not a recent purchase. I bought it in the early 90s from All Electronics as a new surplus item that didn't even have the labeling. Perhaps Mouse Systems had a pile of these things that they weren't going to sell. It's been in my electronics parts box until maybe 2 years ago when I realized it's an interesting item and don't want to scrap it out for parts. Luckily I didn't remove anything from it all those years and it's still pristine with the bag it came in.
I never tried making it work until today. And it works! I printed the pattern in this video: https://www.youtube.com/watch?v=hCT89n-fvkI
It's not ideal though. The movement is pretty choppy. Anyone else have a design that looks more like the grid the original mousepad had?