Bus Servo Driver Board

Product Overview

The JUXI Bus Servo Adapter is an all-in-one serial bus servo control solution specifically designed for LeRobot SO-ARM100/101 robotic arms and multi-servo robotic projects, eliminating the hassle of complex wiring, separate power supply circuits, and low-level control development for servo-driven robots. Integrating both servo power supply and control circuitry on a single compact board, it supports up to 253 serial bus servos with real-time data feedback (position, speed, torque, operating mode), features 7~12.6V wide voltage input matching most mainstream bus servos, and has pre-calibrated mounting holes that fit directly onto SO-ARM100/101 3D printed parts. With plug-and-play Type-C connectivity and full compatibility with Raspberry Pi, Jetson, RDK and other main controllers, it is the ideal control module for embodied intelligence and robotic development.

Key Advantages

Officially Compatible with LeRobot SO-ARM Series

Precisely calibrated mounting holes perfectly match the 3D printed parts of SO-ARM100/101 robotic arms, no modification required, can be installed directly in 2 minutes, saving custom integration time for LeRobot developers.
Control Up to 253 Bus Servos Simultaneously

Solves the problem of complex wiring and insufficient I/O ports when controlling multiple servos, uses a single bus connection to control up to 253 servos with real-time data feedback, perfect for multi-joint robots like robotic arms, quadruped/hexapod robots.
7~12.6V Wide Voltage Input with Integrated Power Supply

Supports direct power supply to servos via DC 5521 interface, input voltage can be adjusted according to servo requirements (7V for standard servos, 12V for high-torque servos), eliminates the need for separate power supply modules.
Plug-and-Play Type-C Connectivity

Connect directly to mainstream controllers (Raspberry Pi, Jetson, RDK, PC) via Type-C USB cable, no complex driver installation required, enables servo control and data feedback out of the box, speeds up project prototyping.
Full Real-Time Data Feedback

Supports reading servo position, speed, torque lock status and operating mode (servo mode / servo motor mode), ideal for advanced closed-loop control projects requiring high precision.
Added TVS Protection Circuit

Provides overvoltage and overcurrent protection for the circuit, effectively preventing damage to the driver board and connected servos from voltage spikes, ensuring stable operation in complex environments.
Compatible with Most Mainstream Bus Servos

Supports nearly all serial bus servos available on the market, offering maximum flexibility for different project requirements.
Ideal for Embodied Intelligence Drive Modules

Specially optimized for embodied intelligence development scenarios, providing stable and reliable servo control solutions for various intelligent robot projects.

Hardware Overview

Bus Servo Driver Board Hardware Overview

Available SKUs:

SKU	Included Components	Suitable For
JUXI Bus Servo Adapter Only	Driver board unit, 4x M2.5 mounting screws	Users who already have a compatible power supply
Adapter + 5V 6A Power Adapter	Driver board, 4x M2.5 mounting screws, 7V 6A DC power adapter (US/EU plug optional)	Standard bus servo projects, SO-ARM robotic arm users
Adapter + 12V 5A Power Adapter	Driver board, 4x M2.5 mounting screws, 12V 5A DC power adapter (US/EU plug optional)	High-torque servo projects, multi-servo robots

Compatible Devices:

LeRobot SO-ARM100 / SO-ARM101 robotic arms, LeKiwi robotic arms, Raspberry Pi series, NVIDIA Jetson series (Nano/Orin/Xavier), Sweet potato RDK series, Windows/macOS/Linux PCs, Orange Pi and other Linux main controllers

3-Step Easy Installation (for SO-ARM robotic arms):

Align the driver board with the pre-designed mounting holes on the SO-ARM 3D printed base
Secure with included M2.5 screws
Connect the servo bus cable to the driver board, connect the power supply and Type-C USB cable to your controller, ready to use

*Full illustrated configuration guide and sample control code included with purchase.

Technical Specifications

Input Voltage	DC 7V ~ 12.6V (match with servo voltage)
Power Interface	DC 5521
Communication Interface	USB Type-C / UART
Max Servo Control Quantity	Up to 253 serial bus servos (with sufficient power)
Supported Feedback Data	Servo position, speed, torque status, operating mode
Product Dimensions	42.00mm × 33.00mm
Mounting Hole Diameter	2.50mm
Mounting Hole Spacing	37.00mm × 28.00mm (perfectly matches SO-ARM mounting holes)
Supported Servo Types	Most mainstream serial bus servos on the market
Protection Feature	TVS overvoltage and overcurrent protection
Warranty	1 year manufacturer warranty

Technical Support

For detailed technical documentation on software setup and code implementation, please refer to our official Wiki: Access Here. Community technical support is also available to help you accelerate project implementation.

Use Cases:

✅ LeRobot SO-ARM100/101 robotic arm development
✅ LeKiwi robotic arm development
✅ Multi-joint robotic projects (quadruped/hexapod robots, anthropomorphic robots)
✅ Embodied intelligence model training and closed-loop control development
✅ Educational robotics teaching and experimentation
✅ Custom servo-driven robot prototyping

Part List

JUXI Bus Servo Adapter Only

1× JUXI Bus Servo Adapter board
4× M2.5 mounting screws (for SO-ARM installation)

Adapter + 5V 6A Power Adapter

1× JUXI Bus Servo Adapter board
4× M2.5 mounting screws
1× 5V 6A DC power adapter (US/EU plug option available)

Adapter + 12V 5A Power Adapter

1× JUXI Bus Servo Adapter board
4× M2.5 mounting screws
1× 12V 5A DC power adapter (US/EU plug option available)