Nybble
Nybble is associated with the OpenCat project, described as a quadruped mini robot kit for hands-on physical AI education.
Project documentation
Before you build
Five answers, each linked to its source
What does it cost?
Not documented
No cost in the reviewed sources.
Can I sell what I build?
Check firstCheck before commercial use
Hardware not documented · Software not documented. Licensing source
What’s open?
4 of 6CAD: AvailableBOM: AvailablePCB: Not documentedCode: AvailableSim: Not documentedGuide: Available
PCB, sim not documented. All six files
What does it run on?
Not documented
Simulation: Not documented. Software
Is it maintained?
Active
Latest activity Sep 8, 2026 · 5 commits in the last 52 weeks · 7 contributors Activity
01 / Under the shell
The specifications.
Hardware, build and software on one sheet. Every fact links to where we found it.
The repository is described as being for Nybble and as part of the OpenCat project, whose goal is a quadruped mini robot kit. OpenCat robots are used for hands-on physical AI education and real-world physical AI applications.
Hardware
- Actuators
- Not documented Documentation
- Build
- 3D-printed · printable parts in the repository Documentation
Building it
Not documented.
Software & simulation
- Runs on
- Not documented
02 / The files behind the robot
What’s open.
Six parts of the build, each checked separately. Gaps stay visible.
| Part | Status | What’s there | License | Source |
|---|---|---|---|---|
| CAD | Available | The repository includes STL files. | Not documented | STL/ |
| Bill of materials | Available | A mini bill of materials is present. | Not documented | miniBOM.csv |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Available | Nybble code files are present. | Not documented | Nybble/ |
| Simulation model | Not documented | Not documented | Not documented | No source found |
| Assembly guide | Available | Assembly instructions are present. | Not documented | AssemblingInstructions.pdf |
03 / Know before you build
Can you sell it?
Check firstCheck before commercial use
No license was found for the design files, so no reuse rights are granted. Ask the maker before building anything to sell.
- Hardware
- Not documented
- Software
- Not documented
04 / The upstream project
Is it maintained?
ActiveLatest activity Sep 8, 2026, 52 days before the snapshot
- Stars
- 1,381
- Forks
- 360
- Contributors
- 7
- Latest release
- None recorded
Snapshot captured Oct 30, 2026. Recorded figures, not live metrics. Active: activity within 90 days of the snapshot. Quiet: within a year. Dormant: longer.
05 / Parts & kits
A head start.
Maker-listed sellers only. No affiliate links or paid placement.
MAKER’S COST
Not documented
No cost in the reviewed sources.
Kit availability is not documented in our reviewed sources.
06 / Side by side
Compare with other quadrupeds.
Other quadrupeds in the directory, most recently active first. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| NybbleThis robotPetoiCamp | Not documented | 4 of 6 | Check firstHW not documented · SW not documented | Not documented | ActiveSep 8, 2026 | 1,381 |
| Spot Micro - LeikaRune Harlyk | Not documented | 4 of 6 | YesHW MIT · SW MIT License | ESP32MuJoCo | ActiveOct 29, 2026 | 92 |
| Physical AntOpenmind-Research-Institute | $2,230.61BOM total | 4 of 6 | YesHW MIT · SW MIT | PythonMuJoCo | ActiveOct 29, 2026 | 76 |
| SesameDorian Todd | Not documented | 6 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | ESP32ArduinoPython | ActiveOct 15, 2026 | 4,876 |
| This robotNybble | Spot Micro - Leika | Physical Ant |
|---|---|---|
| Cost | ||
| Not documented | Not documented | $2,230.61 |
| Can I sell it? | ||
| Check first | Yes | Yes |
| Open files | ||
| 4 of 6 | 4 of 6 | 4 of 6 |
| Runs on | ||
| Not documented | ESP32, MuJoCo | Python, MuJoCo |
| Maintained | ||
| ActiveSep 8, 2026 | ActiveOct 29, 2026 | ActiveOct 29, 2026 |
Upkeep is measured against each robot’s own snapshot. Costs keep the maker’s scope, so check what each figure covers.
See them in the table07 / Follow the evidence
Open books.
Repository files are pinned to commit f6b821f. Websites and papers are listed with their review dates.
- 01README.md at f6b821fReviewed Oct 30, 2026