https://github.com/eelab-dev/EEcircuit
A browser-based SPICE circuit simulator
https://github.com/eelab-dev/EEcircuit
circuit cmos electronics emscripten ngspice simulation spice vlsi wasm webassembly webgl-plot
Last synced: 9 days ago
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A browser-based SPICE circuit simulator
- Host: GitHub
- URL: https://github.com/eelab-dev/EEcircuit
- Owner: eelab-dev
- License: mit
- Created: 2020-10-12T03:48:05.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2025-05-04T01:18:37.000Z (17 days ago)
- Last Synced: 2025-05-05T02:06:55.706Z (16 days ago)
- Topics: circuit, cmos, electronics, emscripten, ngspice, simulation, spice, vlsi, wasm, webassembly, webgl-plot
- Language: TypeScript
- Homepage: https://EEcircuit.com
- Size: 38.5 MB
- Stars: 120
- Watchers: 8
- Forks: 11
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-opensource-hardware - eesim
README
[](https://github.com/eelab-dev/EEcircuit/actions/workflows/build.yml) [](https://doi.org/10.5281/zenodo.4781565)
(formerly EEsim.dev)
# EEcircuit
EEcircuit is a circuit simulator based on [ngspice](https://sourceforge.net/p/ngspice/ngspice/) that operates directly in your browser using [WebAssembly](https://webassembly.org/) technology. It takes a spice-based netlist as input and produces analysis results from your simulations as output. You can visualize and plot the results in the browser using the high-performance WebGL plotting library, [webgl-plot](https://github.com/danchitnis/webgl-plot), or download the data in CSV format for further analysis. Importantly, your netlist and results are processed locally, meaning they always remain within your browser and are never uploaded to a server. This project focuses on facilitating rapid analysis and sharing of circuit ideas and results within the [VLSI](https://en.wikipedia.org/wiki/Very_Large_Scale_Integration) and chip-design communities. Additionally, since EEcircuit uses a text-based netlist as input, you can utilize [Git](https://git-scm.com/) for version control to track your changes effectively.
## Getting started
Copy and paste this circuit into editor and click Run. Input is also compatible with [ngspice](https://sourceforge.net/p/ngspice/ngspice/) netlist.
### Basic RCL circuit
```plaintext
Basic RLC circuit
.include modelcard.CMOS90
r vdd 2 100.0
l vdd 2 1
c vdd 2 0.01
m1 2 1 0 0 N90 W=100.0u L=0.09u
vdd vdd 0 1.8
vin 1 0 0 pulse (0 1.8 0 0.1 0.1 15 30)
.tran 0.1 50
.end
```
## Examples
💥 See [here](https://github.com/eelab-dev/EEcircuit/blob/main/examples.md) for more examples.
## Usage
Use your mouse to pan & zoom on the plot. left click for area **zoom** and right click hold and drag for **pan**. To reset the view **double click**.
## Documentation
📺 A brief [presentation](https://youtu.be/BZLsTAZr1tY) on the origins of EEcircuit (formerly EEsim.dev) and how it was developed. ([slides](https://docs.google.com/presentation/d/e/2PACX-1vROdrVB1vpGM1tqHSvA2HpPmH6B2HpILzLM8kaqnePEtZ8UP_To8q5GsWh90YOtBjYZCUov2rnOzis7/pub?start=false&loop=false&delayms=3000))
To learn more about SPICE netlits refer to [ngspice manual](http://ngspice.sourceforge.net/docs/ngspice-manual.pdf)
## Transistor Models
See [Transistor Models](https://github.com/eelab-dev/EEcircuit/blob/main/models.md) for more information.
## Acknowledgments
Thanks to [Xuanhao Bao](https://github.com/XuanhaoBao), [Chang Liu](https://github.com/chang10912), and [Konstantinos Bantounos](https://www.linkedin.com/in/kbantounos?originalSubdomain=uk) for testing.
## Contributions
[Ngspice](https://sourceforge.net/p/ngspice/ngspice/), [SPICE3f5](https://ptolemy.berkeley.edu/projects/embedded/pubs/), [Emscripten](https://emscripten.org/), [Docker](https://www.docker.com/), [Chakra-UI](https://www.chakra-ui.com/), [Vercel](https://vercel.com/)