Tools
Free, and they run in the browser with nothing to install. Most are real switched converters rather than animations: you pick the topology, write the control loop yourself in C, and the simulation closes that loop cycle by cycle, so you can probe any voltage or current, sweep a parameter and watch the waveforms move. They exist because a plot you can drag teaches more than a plot you can only look at, and each one is the companion to a course.
Buck converter simulator
A buck converter you can program. Pick the topology, write the control loop in C, and run a real switched-converter simulation that closes the loop cycle by cycle. Probe any voltage or current, sweep parameters, and explore the waveforms.
Boost converter simulator
A boost converter you can program. Same engine as the buck simulator — pick standard / synchronous / averaged topology, write the control loop in C, and run a real switched-converter simulation. Probe any voltage or current, sweep parameters, and explore the waveforms.
Single-phase inverter simulator
A grid-connected single-phase inverter you can program. Same engine as the buck and boost simulators — switch the H-bridge or run the averaged model, write the current and power loops in C, and watch the filter current follow its reference. Companion to the inverter courses.
Passive rectifier simulator
A diode bridge with a smoothing capacitor. Start with no capacitor and watch the bare rectified humps, then add one and see the bus flatten while the grid current collapses into narrow spikes. Companion to the rectifier course.
Boost PFC simulator
The active fix for those spikes: a boost power-factor corrector. Write both loops in C, regulate the DC bus above the grid peak, and shape the grid current back into a sine. Companion to the rectifier course.
Plot Explorer
Drop a multi-parameter sweep dataset and explore it: pick which columns become the axes, drag sliders for the rest, with cubic-spline interpolation between points. Everything runs in your browser — the file is never uploaded.