PROTO - circuit simulator

What PROTO simulates and who it suits

PROTO is an electronic circuit simulator that runs in real time. You place components, wire them together and watch what the circuit does while it runs.

The listing points it at people testing Raspberry Pi, Arduino or ESP32 projects before ordering a PCB, and at anyone studying digital electronics. It can also be used as a logic circuit simulator.

Building and running a circuit

Components can be placed from the library and copied within a circuit. Parameters such as voltage and current can be adjusted while the simulation runs.

A single play/pause button starts and stops the run. During a run you can read voltages, currents and other values at points in the circuit, and current flow is shown as animation.

Measuring signals with the oscilloscope

The built-in oscilloscope has four channels, so several signals can be displayed together. The listing describes it as a way to adjust a circuit and see the effect on those waveforms in real time.

Learning from examples and sharing circuits

The app includes example circuits you can open and study, along with video tutorials about electronics. A finished circuit can be shared with other people.

Circuits can be exported as PNG, JPG or PDF files. The whole workspace can also be exported as a single unit.

Themes, feedback and planned Arduino support

The interface comes in Dark, Light, Ocean and Solarized themes. Issues can be reported and new component requests made on the project's GitHub page.

The listing says Arduino support is planned for a future update rather than available now.