Falstad CircuitJS

circuitjs1 · v4.1.0js • deprecated

7.0

Electronic circuit simulator

Education Homepage →

brew install --cask circuitjs1

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Trust Score 1/10

✗ Open source +0

✗ Active development +0

✗ Licensed +0

✗ No auto-updates +0

✗ Deprecated +0

✓ Established (>1yr) +1

✗ Low installs +0

Version History

v4.1.0js

11d ago4.0.0js→4.1.0js

1mo ago3.1.4js→4.0.0js

Review

Mar 11, 2026

Falstad CircuitJS is a versatile browser-based electronic circuit simulator ideal for educators, students, and engineers. It allows users to design and simulate circuits, including logic gates, in a user-friendly interface. Its portability and ease of use make it a valuable tool for learning and prototyping without the need for installation.

Simulates electronic circuits and logic gates in the browser.

Maturity: The project appears well-established, with mentions dating back to 2018, though it lacks recent auto-updates.

Community: Hacker News has featured CircuitJS multiple times, indicating sustained interest and positive reception among developers and educators.

Pros

+ Runs directly in the browser without installation.
+ Supports a wide range of circuit components and configurations.
+ Educational-friendly interface with clear visualization of circuit behavior.

Cons

- No auto-update feature, potentially limiting access to the latest features or bug fixes.
- Dependent on browser performance for simulation, which may vary.