Ploopy: open hardware trackballs and mouse
I'm not sure how "open" I consider a pdf of the schematics (no sign of PCB layouts), compiled hex files and I'm unsure where the mechanical 3D files are. [0]When I think of open hardware I imagine Kicad/Altium files of the electronics (not gerbers), access to the C, C++ or Rust firmware and the STEP files at least or other source modifiable files so they're 3D printable if I was so inclined to modify all three.[0] https://github.com/ploopyco/mouse