Petoi Launches Quaddle: A Palm-Sized Modular Robot Dog
Compact robotics innovation featuring LEGO compatibility and efficient single-servo leg mechanics.
1Evolution of Desktop Robotics
Petoi has spent nearly a decade miniaturizing complex robotic systems for desk-bound users. Since Dr. Rongzhong Li launched the company in 2016, they have shipped over 30,000 units across 60 countries. Their open-source OpenCat framework powers these devices, evolving from the wooden Nybble cat to the new, highly efficient Quaddle robot dog.
2MinDoF Mechanical Innovation
Quaddle achieves complex movement using only four servos, significantly fewer than traditional quadrupeds. The proprietary MinDoF leg system uses a spring-loaded four-bar linkage to drive both shoulder and knee joints with one motor. This design allows the six-ounce robot to walk, spin, and even perform backflips while maintaining structural simplicity.
3Versatile Locomotion Capabilities
Beyond standard walking, Quaddle features integrated bearings on its feet that function as wheels for gliding. In tabletop testing, the device reaches speeds of one body length per second while walking or three lengths per second while gliding. It can also navigate obstacles as tall as its own knee using its unique linkage.
4Intuitive Motion Programming
Users can program movements by physically manipulating the robot's legs, a feature available on Buddy and Scout models. This record-and-play system bypasses complex coding for beginners, allowing a basic walk to be programmed in ten seconds. Advanced users can further refine these motions using the company’s dedicated Skill Composer software platform.
5Hardware and Connectivity Stack
The Buddy and Scout models utilize dual ESP32-S3 chips to separate motion control from AI-driven voice tasks. Coding options range from drag-and-drop blocks to Python and Arduino C++. For research applications, the robot supports ROS integration and allows for mounting a Raspberry Pi Zero on its LEGO-compatible back shell.
6Modular Design and Power
Quaddle uses a swappable 1,800 mAh BL-10C battery, matching the form factor of classic Nokia phone cells. This power source provides 60 to 90 minutes of operation. The chassis is designed for customization, supporting LEGO bricks and 3D-printed shells, enabling transformations into various configurations like rovers or bipedal walkers.
7Pricing and Market Positioning
The product line starts at $179 for the Builder model, with Buddy at $219 and Scout at $269. These prices significantly undercut competitors like the $1,600 Unitree Go2 or the $2,900 Sony Aibo. Deliveries are scheduled to begin in December, targeting classrooms, research labs, and home office environments globally.
8Strategic Efficiency in Robotics
Quaddle demonstrates that reducing mechanical complexity is the most effective path to miniaturization. By replacing multiple motors with spring-loaded linkages, Petoi lowers weight, cost, and battery consumption. This approach shifts the focus from raw hardware power to accessible, modular, and programmable robotics, setting a new standard for desktop-sized autonomous machines.
Original article: Yanko Design — Petoi Launches Quaddle: A Palm-Sized Modular Robot Dog