The open workbench for electronics.

Design schematics, simulate circuits, and run firmware on virtual hardware — in one browser tab, on one open format, with zero proprietary lock-in.

No account. No install. Runs entirely in your browser.
01DesignSchematic → IR
02SimulateIR → ngspice waveforms
03FlashFirmware → virtual ESP32

Everything on the bench is open.

Schematic editorPlace parts, draw nets, and annotate — a direct-manipulation canvas that feels like a design tool, not a CAD relic.
Real SPICE, in the browserngspice compiled to WebAssembly runs transient and operating-point analyses locally. No queue, no server, no upload.
Firmware to a virtual MCUBuild with PlatformIO and flash to an emulated ESP32 — watch your firmware run against the circuit you drew.
One interchange formatKiCad, ngspice, and PlatformIO speak through a single versioned IR. Your design is a portable JSON document, not a lock-in.
Agent-native by designEvery engine is wrapped in an MCP server. AI agents design, simulate, and review through the same contracts you use.
Apache-2.0, patent grant includedThe whole platform — editor, engines, format — is open source. Fork it, embed it, ship products on it.
Built in the open, by agents and people, on KiCad · ngspice · Renode · PlatformIO.
Apache-2.0Interchange format