Sample circuits

Ready-to-run example circuits you can open directly in the app. Each sample is a samples/<name>.numasim.json file in the repo, loaded into the editor with a single click.

TIP

The full gallery is auto-generated from the samples/ folder. See the sidebar for the complete list, or browse the categories below.

How to open a sample

Click any sample's "Open in app" button. The app launches with the sample pre-loaded and ready to run. You can edit it, save your own copy, or just click Run to see it in action.

No account needed to run

Opening and running any sample is free for everyone — no sign-up, whatever the sample's size. Editing a sample (or building your own) needs a free account, up to the free size cap; Pro (coming soon) will remove the cap. See Plans & limits.

The URL pattern is:

https://app.numasim.com/?sample=<id>

where <id> is the sample filename without the .numasim.json extension.

Categories

• Basic circuits — voltage divider, RC charging, RL transient, RLC series response.
• Switching converters — half-bridge, full-bridge, buck.
• Control loops — PI controller, open-loop integrator, PWM power control.
• Digital logic — multi-rate counter, clock divider.
• Power systems — three-phase networks and transmission line models.

The sidebar lists every sample with its title and a one-line description.