RoboPrime
A 3D-printed humanoid with 21 MG90S servo motors and firmware for Bluetooth control.
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?
Yes, with creditCommercial use OK, with credit
Hardware GPL-3.0 · Software GPL-3.0. Licensing source
What’s open?
2 of 6CAD: AvailableBOM: PartialPCB: Not documentedCode: AvailableSim: Not documentedGuide: Not documented
BOM partial · PCB, sim, guide not documented. All six files
Is it maintained?
Not documented
No activity snapshot yet. Activity
01 / Under the shell
The specifications.
Hardware, build and software on one sheet. Every fact links to where we found it.
RoboPrime is a 3D-printed humanoid based on an ATmega328P. Its parts are listed as STL models, and the hardware list specifies 21 MG90S servo motors. The firmware can be compiled and uploaded with Arduino IDE, and the robot can be controlled through Bluetooth.
Hardware
- Actuators
- 21 · MG90S 9G servo motors README
- Build
- 3D-printed · ABS Documentation
- Degrees of freedom
- 21 DOF README
- Microcontroller
- ATmega328P README
Building it
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 | STL model files are listed for download. | Not documented | stl/ |
| Bill of materials | Partial | Hardware parts and screw lists. | Not documented | README.md |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Available | Firmware is contained in the firmware folder. | Not documented | firmware/ |
| Simulation model | Not documented | Not documented | Not documented | No source found |
| Assembly guide | Not documented | Not documented | Not documented | No source found |
03 / Know before you build
Can you sell it?
Yes, with creditCommercial use OK, with credit
The whole repository, design files included, is GPL-3.0. Commercial use is allowed if you keep the maker’s copyright and license notices. Changes you distribute must be shared under the same license.
- Hardware
- GPL-3.0
- Software
- GPL-3.0
04 / The upstream project
Is it maintained?
Not documentedRepository activity is not documented
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 humanoids.
Other humanoids in the directory, most recently active first. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| RoboPrimeThis robotSimone Primarosa | Not documented | 2 of 6 | Yes, with creditHW GPL-3.0 · SW GPL-3.0 | Arduino | Not documented | — |
| MicrobanMarc Duclusaud | About $567Microban robot | 5 of 6 | NoHW CC BY-NC-SA 4.0 · SW GNU GPL v3 | Raspberry Pi | ActiveOct 30, 2026 | 645 |
| Asimov 1menloresearch | $20,000DIY Kit | 3 of 6 | Yes, with creditHW CERN-OHL-S-2.0 · SW GPL-2.0 | MuJoCoRaspberry Pi | ActiveOct 30, 2026 | 1,373 |
| DropbearHyperspawn and Pointblank | Not documented | 2 of 6 | NoHW not documented · SW not documented | Isaac | ActiveOct 2, 2026 | 48 |
| This robotRoboPrime | Microban | Asimov 1 |
|---|---|---|
| Cost | ||
| Not documented | About $567 | $20,000 |
| Can I sell it? | ||
| Yes, with credit | No | Yes, with credit |
| Open files | ||
| 2 of 6 | 5 of 6 | 3 of 6 |
| Runs on | ||
| Arduino | Raspberry Pi | MuJoCo, Raspberry Pi |
| Maintained | ||
| Not documented | ActiveOct 30, 2026 | ActiveOct 30, 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 e2f3e4f. Websites and papers are listed with their review dates.
- 01README.md at e2f3e4fReviewed Nov 1, 2026
- 02LICENSE at e2f3e4fReviewed Nov 1, 2026