SimX Live Circuit Tutorial

Learn circuits and simulate them on the same page

This series combines text explanations, ready-made schematics, and live simulation into a single learning path. Read the overview, jump into a lesson, and run examples right where you read them.

Start with minimal concepts: nodes, voltage, current, energy storage, and waveforms before real circuits.

First track focuses on Buck: from the simplest power stage to PWM, feedback, PAC, and optimization.

Each lesson provides observation points — which nodes, parameters, and waveforms to watch.

How to use this course

Start from the overview, pick a lesson, read the explanation, then run the example directly on the page. Use the watch items to focus on key nodes and waveforms.

Pick a lesson from the course overview

Read the explanation, then run the example

Use watch items to observe nodes, currents, and waveforms

Available Series

Start with a complete learning track — from fundamental concepts to real design trade-offs.

5 chapters

Switch-Mode Power Supplies from Scratch

This series starts from the most basic voltage step-down needs and guides you through every key aspect of switch-mode power supplies. Each chapter focuses on one topic, with interactive circuit simulations to learn by doing.

Ch.1 · Buck Converter: Understanding Switch-Mode Power from Scratch
Ch.2 · CCM and DCM: Two Operating Modes of the Buck Converter
Ch.3 · Why Buck Needs Feedback Control
Ch.4 · Closed-Loop Feedback: Making Buck Auto-Regulate
Ch.5 · Loop Compensation and Stability

View Series