Just1
A mecanum-wheel mobile robot with printable parts for manual control and autonomous navigation.
Project documentation
Before you build
Five answers, each linked to its source
What does it cost?
$250complete build
The README states a complete build cost of $250. README
Can I sell what I build?
YesCommercial use OK
Hardware MIT · Software MIT. Licensing source
What’s open?
3 of 6CAD: AvailableBOM: AvailablePCB: Not documentedCode: AvailableSim: Not documentedGuide: Not documented
PCB, sim, guide not documented. All six files
What does it run on?
Simulation: Not documented. Software
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.
Just1 is a mecanum-wheel robot that can be controlled manually or navigate autonomously, follow a path, and avoid obstacles. Its hardware stack includes a Raspberry Pi 4, mecanum wheels, TT motors, 2D lidar, a camera, and an IMU. The project provides a STEP assembly model and STL files for 3D printing parts.
Hardware
- Actuators
- 4 · TT motors Bill_of_material.md
- Build
- 3D-printed · STL print files Documentation
- Drive
- 4 x 60mm Mecanum wheels and 4 TT motors Bill_of_material.md
- Sensors
- 2D lidar, Raspberry Pi Camera, and IMU 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 | STEP assembly model and STL files for 3D printing parts | Not documented | CAD/ |
| Bill of materials | Available | Bill of Materials with components and prices | Not documented | Bill_of_material.md |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Available | ROS 2 packages | Not documented | Software/ |
| 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?
YesCommercial use OK
The whole repository, design files included, is MIT. You can build, modify and sell robots based on it, as long as you keep the license and copyright notices.
- Hardware
- MIT
- Software
- MIT
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.
Kit availability is not documented in our reviewed sources.
06 / Side by side
Compare with other mobile robots.
Closest documented maker’s cost first, then the most recently active mobile robots. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| Just1This robotNRdrgz | $250complete build | 3 of 6 | YesHW MIT · SW MIT | ROS 2Raspberry Pi | Not documented | — |
| LeKiwiSIGRobotics-UIUC | $4995V version | 4 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobotRaspberry Pi | ActiveAug 5, 2026 | 1,497 |
| AlohaMiniLi Yiteng / Wu Zhiyong | About $600total, self-print | 5 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobotRaspberry Pi | QuietJul 23, 2026 | 8 |
| OpenPodcarOpenPodcar | Not documented | 6 of 6 | Yes, with creditHW GPL-2.0 · SW GPL-2.0 | ROS 1GazeboArduino | DormantMay 9, 2022 | 50 |
| This robotJust1 | LeKiwi | AlohaMini |
|---|---|---|
| Cost | ||
| $250 | $499 | About $600 |
| Can I sell it? | ||
| Yes | Yes | Yes |
| Open files | ||
| 3 of 6 | 4 of 6 | 5 of 6 |
| Runs on | ||
| ROS 2, Raspberry Pi | LeRobot, Raspberry Pi | LeRobot, Raspberry Pi |
| Maintained | ||
| Not documented | ActiveAug 5, 2026 | QuietJul 23, 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 a00abd6. Websites and papers are listed with their review dates.
- 01README.md at a00abd6Reviewed Oct 31, 2026
- 02LICENSE at a00abd6Reviewed Oct 31, 2026
- 03Bot/Hardware/Bill_of_material.md at a00abd6Reviewed Oct 31, 2026
- 04Bot/Hardware/README.md at a00abd6Reviewed Oct 31, 2026