The short version
A browser-based circuit simulator for interactive electronics prototyping and probing.
From the HackerLinks archive
CircuitJS
A browser-based circuit simulator for interactive electronics prototyping and probing.
At a glance:
First seen:2026-08-17
Last seen:2026-08-17
Times seen:1
Website:falstad.com
Why it caught our attention
A regular user gave a specific workflow comparison against SPICE simulators.
Where it surfaced on Hacker News
2026-08-17
“He also made circuitjs, a very useful circuit simulator which I regularly use for prototyping.”
peterus · recommendation · first hand use
Direct HN comment
Falstad Math and Physics Simulations