01 / CAD
The shape of things.
Design files and printable parts. See what you can make, modify, and put together.
THE OPEN ROBOT DIRECTORY
Good things
come in
parts.
Find your next robot to build. Discover open-source hardware, from the first printed part to the code that makes it move.
Explore the collection Made to be made your own.
IN THE OPEN / ARM
LESS SCROLLING.MORE BUILDING.
$121.94per follower arm
01 THE COLLECTION
Find your kind
of robot.
Small hands. Big ideas. A rover for the long way home.
There’s a whole world of hardware to make your own.
SEARCH
| Compare | Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|---|
| Antagonistic Tendon Driven Continuum RobotChristian Marzi | Not documented | 1 of 6 | Yes, with creditHW CERN-OHL-W-2.0 · SW CERN-OHL-W-2.0 | Arduino | Not documented | — | |
| Aria Art Plottergustavomayoral | Not documented | 4 of 6 | Yes, with creditHW CERN-OHL-S-2.0 · SW GPL-3.0 | ArduinoPython | Not documented | — | |
| HsiwuRobusr | Not documented | 4 of 6 | YesHW MIT License · SW not documented | Not documented | Not documented | — | |
| Open source robot for liquid handing and serial multiplexing fluorescence microscopyPRNicovich | Not documented | 4 of 6 | Check firstHW not documented · SW not documented | Arduino | Not documented | — | |
| openBrushographDominik Mahnic | Not documented | 1 of 6 | Yes, with creditHW CERN-OHL-S-2.0 · SW not documented | ESP32Arduino | ActiveOct 15, 2026 | 28 | |
| OpenRSTjcolan | Not documented | 3 of 6 | Yes, with creditHW CERN-OHL-S v2 · SW CERN-OHL-S-2.0 | Not documented | Not documented | — | |
| Snapbot V2.0uiuckimlab | Not documented | 4 of 6 | Check firstHW not documented · SW not documented | Not documented | Not documented | — |
Costs are the maker’s documented figures, with their original scope. Stars are recorded GitHub snapshots, never a quality score. Active: activity within 90 days of the snapshot. Quiet: within a year. Dormant: longer. Read between the files
02 READ BETWEEN THE FILES
Open isn’t
one checkbox.
A public repository is a start. A buildable robot takes more. We look at six parts of every project, so you know what’s there before you get your hands busy.
02 / BOM
Every little part.
A bill of materials. The shopping list behind the build, with costs where documented.
03 / ELECTRONICS
Under the shell.
Circuit designs, boards, and wiring. Custom hardware or off-the-shelf components.
04 / CODE
A mind of its own.
The software that brings it to life. Check the stack before you start building.
05 / SIMULATION
Try before you print.
A digital model to test, train, and explore before the hardware meets the real world.
06 / GUIDE
A way through.
Assembly instructions. Because a folder full of files isn’t the same as a finished robot.
AND ONE IMPORTANT QUESTION
Can you build it? Can you sell it?
Those are different questions. Hardware and software can carry different licenses. Every listing explains what’s available and what the documented licenses allow. If we don’t know, we say so.