Dot Physics. Python Physics; Rigid Body Rotations Using the Rotation Matrix and the Inverse Inertia Tensor. Posted: May 20, 2025 | Last updated: May 20, 2025 ...

He calls it an LED matrix “Paint Toy” because one of the features he’s included lets the user create pixel art like in MS Paint. The 10×8 grid of lights is controlled by a PIC 16F877A.