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CircuitJS1 project preview
HardwareAlternative to Multisim LiveAlternative to Falstad SimulatorAlternative to EveryCircuit

CircuitJS1

Electronic circuit simulator that runs in the browser with interactive animated current flow.

View on GitHub Visit website
LicenseGPL-2.0
GitHub stars5.8k
Last commit1 weeks ago
Tags6 topics
HardwareFalstad CircuitJavascriptSpice EngineElectronic SimulationCircuit Simulator
Overview

Why consider CircuitJS1?

CircuitJS1 is an open-source electronic circuit simulator running in modern web browsers via JavaScript/GWT. Created by Paul Falstad and Iain Sharp, it visualizes voltage and current flow animations, operational amplifiers, 555 timers, logic gates, and scope traces.

Guided learning

Learn CircuitJS1 by building

Practical setup notes, real use cases, and copy-ready examples in one focused guide.

1 min read 2 sections
In this guide2 sections

Overview of CircuitJS1

CircuitJS1 illustrates electronics principles with real-time green current particle animations and dynamic component adjustment sliders.

Quickstart

Run directly in your browser at falstad.com/circuit or host locally with Node.js/Docker.

CircuitJS1 is licensed under the GNU General Public License v2.0 (GPL-2.0).

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CircuitJS1 FAQs

CircuitJS1 is listed as a Hardware tool on TiloBox. Review the overview, features, and official documentation on this page to decide whether it solves your specific workflow.

Start with the project's GitHub repository and official website for supported installation and deployment instructions. Test the setup with representative data or a small project before rolling it out more widely.

CircuitJS1 is listed under the GPL-2.0 license. Read the complete license text and the project's notices before using, modifying, or distributing the software.

Production readiness depends on your requirements. Review maintenance activity, security practices, documentation, backup and upgrade procedures, and compatibility with your stack; then validate it in a non-production environment.

CircuitJS1 is listed as an alternative to Multisim Live. Compare the core workflow, deployment model, integrations, and licensing against your must-have requirements before switching.