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123D Circuits is an open hardware community providing
free collaborative circuit design tools and easy PCB manufacturing.

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Design and Simulate Circuits

The best way to learn electronics without breaking your Arduino.

Collaborate as a team

Our editor allows for multiple people to work on the same projects simultaneously.

Easily order multilayered PCBs

Create your own designs in the online editor or buy a design from the community.

Breadboard Editor With Realtime Simulation

Test your Arduino code in our real-time simulation environment and see your designs come to life in the browser.

Schematic Editor

All the tools you need to design advanced schematics with the components you need.

Easy to use
PCB Editor

Connecting your components has never been more fun. If you need multiple layers, we’ve got you covered.

Collaborate like
never before

Improve existing designs from the community, or edit circuits collaboratively in real-time

Venture from the world
of circuits and into 3D

Check out the awesome, free apps on Autodesk 123D to take you from circuits to modeling, making, and more.