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Featured Circuits

Example designs built with SimX

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Simple Buck Converter

Basic step-down DC-DC converter with switching waveform analysis.

Buck with PWM Control

PWM-controlled buck converter with gate drive and timing analysis.

Buck with Feedback Loop

Closed-loop buck converter with voltage feedback and regulation.

Buck PAC Analysis

Buck converter with periodic AC small-signal analysis, plotting Bode gain and phase response.

PCB Layout Editor

Integrated PCB layout with footprint placement and routing.

PCB 3D Viewer

Interactive 3D visualization of your PCB design.

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Features

Schematic Editor

Quick circuit building with a rich library of components and models. Easily configure analyses and parameters.

Simulator

Comprehensive analysis suite: DC, AC, Transient, Sweep, Monte Carlo, and more — all in one engine.

Optimizer

Wizard-guided setup makes optimization easy. Multiple algorithms available to automatically tune your design.

Waveform Viewer

Interactive, intuitive visualization for all analysis types. Linked with the schematic — select a net or component to highlight its waveform.

PCB Editor

Auto-generate layout from schematic. Auto-place, auto-route, and preview your board in interactive 3D.

SI / PI Analysis

Signal and power integrity analysis for your PCB design. Early access — more capabilities coming soon.

Why SimX

Fast

100×+ faster than traditional SPICE — built for speed from the ground up

Complete

Schematic, simulation, PCB, and signal integrity — one tool covers the entire design flow

Easy

100% browser-based — zero install, open and go

Ideal For

Students

Learn circuit theory hands-on with instant simulation feedback.

Educators

Demonstrate concepts in live classroom sessions — students open the same tool in their browsers.

Makers

Quickly prototype and validate hobby projects before committing to hardware.

Engineers

Rapid design exploration and feasibility checks — get directional answers in seconds, not hours.