Summary:

 

RX1 is an open‑source humanoid robot platform developed by Red Rabbit Robotics. It is designed for research, education, and simulation, with full ROS1 support, a complete URDF model, inverse‑kinematics libraries, and Gazebo simulation packages.  

The RX1 is not a commercial industrial humanoid — it is a developer‑friendly, modular, open‑source biped intended for robotics labs, universities, and hobbyists.

 

Editorial:

 

RX1 represents the classic open‑source ethos in humanoid robotics: transparent, modifiable, and built for experimentation.  

Red Rabbit Robotics provides the full stack — URDF, IK solvers, motor libraries, and Gazebo simulation — making RX1 a strong platform for:

 

- gait research  

- balance control  

- whole‑body IK  

- ROS‑based humanoid development  

- simulation‑first robotics workflows  

 

While it is not a mass‑manufactured hardware product, RX1’s complete open‑source codebase makes it a valuable reference design for anyone building or simulating humanoid robots.

 

Specifications:

 

Dimensions & Build

(No physical dimensions published.)  

- Design Intent: Open‑source humanoid for research and simulation  

- Construction:  

  - Modular humanoid frame  

  - Human‑scale dual‑arm configuration  

  - URDF‑defined structure for simulation and IK  

 

Mobility

- Locomotion: Bipedal (simulated)  

- Capabilities:  

  - Full Gazebo physics simulation  

  - IK‑based motion planning  

  - ROS1 bringup for hardware or sim  

 

Degrees of Freedom

- Total DOF: Not published  

- Arms: 7‑DOF per arm (based on servo assembly documentation)  

- Hands: Optional 5‑finger tendon‑driven hands (open‑source design)  

 

Actuation

- Actuator Type: Feetech servo motors  

- Servo Counts:  

  - 14× STS3215 for two arms  

  - 8× SCS0009 + 4× STS3032 for two hands  

- Capabilities:  

  - Low‑cost, hobby‑grade actuation  

  - 3D‑printed gearboxes for some joints  

 

Manipulation

- Capabilities:  

  - Dual‑arm manipulation  

  - Dexterous 5‑finger hands (optional)  

  - IK‑driven grasping in simulation  

- Payload: Not published  

 

Perception & Sensors

(No sensor suite published.)  

RX1 is primarily a mechanical + software platform, with sensors left to the builder’s choice.

 

Compute & AI

- Software Stack:  

  - ROS1  

  - URDF model  

  - Inverse‑kinematics package  

  - Motor‑control libraries  

  - Gazebo simulation  

- AI: Not included; users integrate their own models  

 

Battery & Power

- Power Source: Not included (user‑defined)  

- Runtime: Not applicable  

 

Connectivity

- ROS1 communication  

- Standard ROS topics/services  

- Simulation‑first workflow  

 

Applications

- Robotics education  

- Humanoid research  

- IK and control‑algorithm development  

- Simulation‑first prototyping  

- Open‑source hardware experimentation  

 

Pricing

- Open‑source (MIT License)  

- Hardware cost depends on servo selection and 3D‑printed parts  

 

Red Rabbit Robotics has NOT published:  

- Height  

- Weight  

- Torque values  

- Joint speeds  

- Sensor specifications  

- Battery specs  

- Environmental ratings  

 

Image: @lethic

 

Company Source:

 

https://www.redrabbitrobotics.ai/

 

Key News & Coverage:

 

https://youtube.com/shorts/Tx-xMlCX2DU?si=Z9b_6ZhDlRnOhi7I

 

https://youtu.be/MM0tyMLQW2k?si=njMLrLNqMpiPHqZH