Licences and source

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PlainSpice

PlainSpice's own code is free software under the MIT licence; its documentation is CC BY 4.0. Source: github.com/ctbay1/plainspice.

The simulation engine: ngspice 47

The app runs ngspice 47, compiled to WebAssembly (the file engine/ngspice-….wasm). Copyright 1985–1994 (with later contributions to 2018) Regents of the University of California; copyright 2001–2026 the ngspice team; Modified BSD licence. ngspice includes numparam, copyright © 2002 Georg Post, under the GNU Lesser General Public License version 2 or later. This app uses ngspice; it is not made or endorsed by the ngspice team or the University of California.

• Third-party notices (every licence and notice in the engine)
• Licences of the JavaScript packages in the app (React, React Aria, CodeMirror, uPlot, …)
• GNU Lesser General Public License, version 2.1
• ngspice's licence statement (COPYING)

Get the engine's exact source

• Where the source is, and its SHA-256
• ngspice-47.tar.gz (the unchanged upstream release, about 13 MB)
• The build script and the build record
• Our patches: 0001, 0002, 0003, 0004; the device models left out are listed in the build script
• How to rebuild the engine or use your own build