electronic

Hey everybody, I'd like to share the project that I've just finished. It's standalone electronic scoreboard, that follows ITTF rules of counting, exchanging serves and sides. It also randomly selects player sides, and first to serve and in case of 3 players it assigns one random player to wait...

In the China Open 2019, the statistics of the placement and the spin (rpm) were showed. It's my first time seeing these. So nice! Any buddy can help answer my questions below? Thank you very much! :D 1. How did they get the figures? What kind of devices were used? Especially the spin one...