Circuit Shelf
Build and run real electronic circuits in CircuitJS — Paul Falstad’s open-source simulator — wrapped in a Predict → Explore → Explain coach. Pick a challenge, lock in a guess before you wire anything, build it, then let the coach compare what you predicted with what the meters actually read.
Open Circuit Shelf Opens the tool directly — no account, no signup, nothing to install.
Share this tool with a class or a colleague
This link opens Circuit Shelf on its own. Paste it into an assignment, a sub plan, a slide, or a message and it opens on the tool the student needs.
https://alloflow-cdn.pages.dev/circuit-shelf
Where this fits
Circuit Shelf is one of the tools in the AlloFlow STEM Lab. AlloFlow is free and open source, and it runs in a browser.
See every STEM tool with a shareable link, or search the tool finder by topic or classroom goal.
Is there a manual for this tool?
Not yet. AlloFlow has written manuals for a few tools so far — see the manuals and guides page — and this one is not among them. The tool itself carries its instructions on screen.