Cirkit Designer

Online Arduino Simulator

Design and simulate Arduino projects in your browser.

Use Cirkit AI to help with wiring and code, then test the circuit in simulation before you build it.

Start with Arduino Uno View projects

Start from a board

Start from an Arduino board.

Pick a board, add parts, and simulate the circuit as you build.

Most popular
Arduino Uno board

Arduino Uno

The default board for LEDs, buttons, sensors, displays, and classroom labs.

Start with Uno
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Arduino Mega board

Arduino Mega

A better fit for larger layouts, multiple modules, motors, and display-heavy projects.

Start with Mega

Arduino project gallery

Explore real Arduino projects.

Open real Arduino projects, inspect the wiring, run the simulation, and adapt them for your own build.

Arduino UNO Pong game with OLED display project in Cirkit Designer

Pong game with OLED

Run game logic on an Arduino Uno with OLED output and pushbutton paddle controls.

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Arduino UNO Lode Runner game with ILI9341 display project in Cirkit Designer

Lode Runner on ILI9341

Test an Arduino graphics project with a TFT display and multiple pushbutton inputs.

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Arduino UNO hotel safe project with keypad LCD and servo in Cirkit Designer

Hotel safe

Combine keypad input, LCD messages, and servo movement into a simulated lock project.

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Arduino UNO bot project with L298N motor driver in Cirkit Designer

Bot with L298N driver

Control two DC motors through an L298N driver using joystick input and Arduino logic.

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Arduino UNO DHT11 temperature humidity sensor and LCD project in Cirkit Designer

DHT11 sensor + LCD

Read temperature and humidity from a DHT11 sensor and display live values on a 16x2 LCD.

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Arduino UNO DS1307 real time clock and LCD project in Cirkit Designer

DS1307 clock + LCD

Use a real-time clock module with an Arduino Uno and print date/time to an LCD.

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View all featured projects

Why Cirkit

Design with AI. Test in simulation. Build when ready.

Use Cirkit AI to help wire your Arduino project, generate code, and troubleshoot as you build. Then run the simulation in the browser and export diagrams, share the project, or upload firmware when you are ready to build.

Start with AI assistance

Ask Cirkit for help wiring parts, generating code, and debugging your Arduino project as you build.

Simulate the connected project

Run the sketch while sensors, displays, motors, buttons, and LEDs respond in the same workspace.

Export and build

Download the wiring diagram, share the project, or upload firmware to supported hardware when you are ready to build.

FAQ

Common questions.

What can I do with Cirkit's Arduino simulator?

Build Arduino circuits, write sketches, and run simulations directly in the browser.

Is Cirkit Designer free to start?

Cirkit Designer is free to start. A Cirkit membership unlocks advanced features.

Which Arduino boards does Cirkit Designer support?

Cirkit Designer currently supports Arduino Uno and Arduino Mega projects, along with common sensors, displays, motors, buttons, and connected modules.

Can Cirkit AI help with Arduino projects?

Cirkit AI can help with wiring, code generation, circuit questions, and troubleshooting issues as you design and simulate.

Can I build the real circuit after simulation?

Yes. Use the simulated project as a build reference, then export the wiring diagram, share the project, or upload firmware to supported hardware when you are ready.

Free to start ยท No installation

Start simulating Arduino projects in Cirkit Designer.

Open a project, add an Arduino, and simulate the first version before the parts arrive.

Start with Arduino Uno Read the docs