Learn
Theory from volt-second balance to CCM/DCM, topologies, magnetics, losses and energy-harvesting interfaces. Every equation is generated from one source file and checked by tests.
Switching Converter Study
Go from quoting the textbook conversion ratio to designing, simulating and measuring a converter — and explaining why the measurement disagrees with the formula.
Design
Calculators for converters, magnetics, loss budgets, sense chains and clamps, all driven by the same tested equation engine.
Simulate
An in-browser time-domain converter simulator, plus LTspice, ngspice and CircuitJS files for every topology.
Verify
Derivations are reproduced in sympy, TypeScript and Python agree to 1e-9, citations and links are checked in CI.
Recurring bench and design mistakes, each with its symptom, its cause and its fix, are collected under Gotchas.
This site is being built in phases. See About for the principles and the roadmap, and the equation pipeline check for the verification chain that every page builds on.
The numbers in the examples, presets and exercises on this site are synthetic: round teaching values, not data from any real design.