Learnsy lessons
Interactive technical intuition
Standalone lessons that pair concise theory with browser-based simulators. Open a lesson directly and tune the system while reading what each scenario is meant to show.
PID Controllers
Control a motorized arm with a hanging weight. Tune Kp, Ki, and Kd to see offset, ringing, damping, windup, and disturbance response.
Kalman Filters
A delivery robot with jumpy GPS and drifting wheels. See how a Kalman filter blends both into one best guess — and when simpler methods fall apart.
How Tides Work
Orbit the Moon through a lunar month. See gravity make two tidal bulges, and drag time to compare spring and neap tides.