Seven — 3-DOF Arduino Robotic Arm
A 3-DOF 3D-printed Arduino arm with four SG90 servos, supporting joint control, inverse kinematics and gripper 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?
YesCommercial use OK
Hardware MIT · Software MIT. Licensing source
What’s open?
3 of 6CAD: AvailableBOM: AvailablePCB: Not documentedCode: AvailableSim: Not documentedGuide: Partial
Guide partial · PCB, sim 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.
Seven is a 3-DOF robotic arm made with 3D-printed parts and SG90 servo motors, controlled by an Arduino Uno over serial. It supports manual joint control, inverse kinematics, gripper control, waypoint programming and external software integration.
Hardware
- Actuators
- 4 · SG90 servo motors README
- Build
- 3D-printed · Hyper PLA recommended Documentation
- Degrees of freedom
- 3-DOF 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 files for the arm parts. | Not documented | STL_files/ |
| Bill of materials | Available | Hardware requirements table lists components and details. | Not documented | README.md |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Available | Arduino sketches and arm logic files. | Not documented | code/ |
| Simulation model | Not documented | Not documented | Not documented | No source found |
| Assembly guide | Partial | Assembly guide YouTube video. | Not documented | youtu.be |
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.
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 arms.
Other arms in the directory, most recently active first. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| Seven — 3-DOF Arduino Robotic ArmThis robotT. Selçuk Yüksel | Not documented | 3 of 6 | YesHW MIT · SW MIT | Arduino | Not documented | — |
| Star Arm 102Fashion Star | Not documented | 5 of 6 | Check firstHW not documented · SW not documented | LeRobotROS 2Python | ActiveOct 30, 2026 | 60 |
| reBot Arm Base SeriesSeeed-Projects | Not documented | 4 of 6 | Yes, with creditHW CERN-OHL-W-2.0 · SW Apache-2.0 | ROS 1ROS 2LeRobot | ActiveOct 30, 2026 | 4,628 |
| SO-ARM 102Robonine | Not documented | 4 of 6 | YesHW CERN-OHL-P-2.0 · SW Apache-2.0 | LeRobot | ActiveOct 29, 2026 | 175 |
| This robotSeven — 3-DOF Arduino Robotic Arm | Star Arm 102 | reBot Arm Base Series |
|---|---|---|
| Cost | ||
| Not documented | Not documented | Not documented |
| Can I sell it? | ||
| Yes | Check first | Yes, with credit |
| Open files | ||
| 3 of 6 | 5 of 6 | 4 of 6 |
| Runs on | ||
| Arduino | LeRobot, ROS 2, Python | ROS 1, ROS 2, LeRobot, Isaac, Python |
| 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 9d28cc9. Websites and papers are listed with their review dates.
- 01README.md at 9d28cc9Reviewed Oct 31, 2026
- 02LICENSE at 9d28cc9Reviewed Oct 31, 2026