Here it is http://janismac.github.io/ControlChallenges/
And discussion https://news.ycombinator.com/item?id=37637006
I dont know how I messed up my first search.
Re:PID Controllers in Unity3D
by iAmAPencilYo on Tuesday January 16, 2024 @04:03PM
(#39019102)
Thank you for sharing, those are awesome exercises.
https://docs.wpilib.org/en/stable/docs/software/advanced-con...
Here's another. These pages interactively go over tuning pid controllers for position, velocity, and position with gravity compensation.
These docs are designed for high schoolers to learn about programming PID.
I think that was posted here on HN but I can't find the link...