Design, simulate and understand.
The circuit lab in your browser.
From your first LED to professional prototyping — with an AI tutor, live collaboration, and one-click export to SPICE and KiCad.
No install. No credit card. Runs at 60fps in the browser.
Move the slider. Watch physics happen.
This is the real SPICE-lite transient solver running in your browser at 60fps. Change the source voltage or resistance and see the capacitor charge in real time.
Powerful enough for pros. Simple enough for your first circuit.
No intimidating grey CAD. Rounded, calm, and alive — the way learning hardware should feel.
Draw & simulate
A lag-free 2D canvas with real-time data on every node. Drag a component, wire it up, and the solver updates instantly.
The AI tutor
An agent that builds circuits from a prompt, edits the one you have, finds the short and fixes it — explaining the why in plain language.
Live collaboration
Design circuits together like you would in Figma. Shared cursors, presence, and a single live document.
Real-time analysis
Voltages, currents and transients computed by a SPICE-lite MNA engine running at 60fps — right in the tab.
One source of truth
Your schematic becomes a breadboard, then a 3D model — always in sync. Learn the layout, not just the theory.
Export anywhere
Ship real hardware with one-click export to SPICE netlists and KiCad. No lock-in, no rework.
Ask it anything. Or ask it to build.
More than a tutor: describe what you want and the agent builds the whole circuit from scratch, or reworks the one you already have. It also answers questions, spots the short, and walks you through the reasoning — turning every mistake into a lesson.
- Build a full circuit from a plain-text prompt
- Modify or extend an existing design
- Explains failures & applies one-click, reviewable fixes
Your LED is wired directly across 9V with no resistor — that's a short. I'll add a 330Ω series resistor to limit current to ~20mA.
- Inspecting the schematic
- Tracing the fault path
- Sizing the series resistor
Design circuits like you use Figma.
Share a link and build together in real time. Shared cursors, live presence, and one single source of truth — no more emailing versioned files.
- Multiplayer cursors & presence
- Comment and iterate together
- One live document, always in sync
Schematic → breadboard → 3D. Always in sync.
The same circuit, three views. Learn the theory on the schematic, the layout on the breadboard, and see the finished build in 3D — edit one, they all update.
- 2D schematic canvas
- Realistic breadboard view
- Interactive 3D model
A teaching tool that ships real hardware.
Antika Circuit isn't a toy. The same canvas that teaches a student their first LED drives professional prototyping — with a real MNA engine and exports to the industry standards.
MNA solver
Modified Nodal Analysis at its core — the same math professional simulators use, tuned to run in the browser.
SPICE export
Generate clean ngspice-compatible netlists from any design. Validate against the tools you already trust.
KiCad handoff
Move from prototype to PCB without rework. Export straight into your KiCad workflow.
Reproducible
Every circuit is a single source of truth — versionable, shareable, and identical for everyone on the team.
Start building today. Nothing to install.
Open a browser tab and place your first component. Antika Circuit is free to start, forever.