SO-101 Leader Arm Kit
A complete SO-101 leader arm in a single kit: the 3D-printed structural frame plus its matched electronics, so you get one fully buildable arm without sourcing the parts separately.
The leader arm is the half you physically manipulate to control a follower. This bundle pairs the leader frame with the correct 7.4V electronics — 6x Feetech STS3215 servos, a 5V power supply, a serial bus servo adapter, and all wiring — tuned for smooth human control.
What's Included:
- 1x Leader Arm Frame Kit (3D-printed structural components)
- 1x Leader Arm Electronics Kit (6x 7.4V servos, 5V PSU, controller, wiring)
Important: Leader and follower arms use different electronics (7.4V vs 12V). This is the LEADER arm. For a full dual-arm teleoperation system, see the Complete Teleoperation Kit.
Perfect for:
- Replacing or adding a leader arm to an existing setup
- Teleoperation builds (pair with a Follower Arm Kit)
- Educational demonstrations of teleoperation
No soldering required. Works with the open-source LeRobot software stack.
Ships in 2–5 business days
Fulfilled by Amazon from US warehouses. Tracking emailed once the box is on the truck.
30-day return on defects
If a part arrives damaged or wrong, reply to your order email — we make it right. See full terms.
Open-source by design
Every part matches the upstream LeRobot SO-ARM100 spec. Swap, modify, and share freely.
What's in the box — each piece is also sold individually:
Open-Source Design
This kit is based on SO-ARM100 (LeRobot Project) by Hugging Face and LeRobot Community.
Key Features
- Complete single arm — frame and matched electronics in one kit
- 6x 7.4V serial bus servos optimized for smooth human control
- 5V regulated power supply and serial bus servo adapter included
- All wiring and connectors included
- Pre-calibrated servos with position sensing
- Compatible with the LeRobot software stack
- No soldering required
Technical Specifications
| SKU | SO-101-LEADER-BUNDLE |
| Configuration | Complete single leader arm (frame + electronics) |
| Frame | 3D-printed PLA+ structural components |
| Servos | 6x Feetech STS3215 Serial Bus Servos (7.4V) |
| Power Supply | 5V 4A adapter with barrel connector |
| Controller | 1x Serial Bus Servo Adapter (USB-C to host) |
| Assembly | Assembly required (no soldering) |
| Arm Type | Leader (human-controlled) |
| Use Cases | Teleoperation control, educational demonstrations |