Physics simulations and electronics calculators you can actually play with. No ads. No accounts. No fluff.
Solve for voltage, current, or resistance interactively with a live circuit diagram.
Visualize simple harmonic motion with a live animated pendulum and period readout.
Calculate image distance, magnification, and image height using the thin lens equation for convex and concave lenses.
Move a slider and watch the physics change in real time — the best way to build intuition.
Every formula, every animation, every line of code is public. Fork it, learn from it, contribute.
No sign-up, no paywall, no ads. Load a tool and start exploring immediately.