OpenCat is an open-source, programmable quadruped robotic cat designed to mimic the natural movements and behavior of real animals. Originally developed by Petoi, OpenCat is one of the most advanced DIY robotic pet platforms available for students, hobbyists, robotics researchers, and AI developers.

OpenCat integrates multiple servo motors, IMU balancing, and AI-based programming to achieve smooth walking, running, standing, turning, and playful pet-like actions. Its 3D-printed or laser-cut frame makes it lightweight, flexible, and easy to customize.

Key Features

⭐ 1. Bio-Inspired Quadruped Movement

1. Natural feline walking gait
2. Smooth transitions between sitting, standing, resting, and walking
3. Capable of turning, trotting, crawling, and mini-jumps
4. Balancing system that adjusts in real time

⭐ 2. Fully Programmable & Open-Source

1. OpenCat OS (C++, Arduino-based)
2. Supports Python control
3. Compatible with Raspberry Pi, Arduino, ESP32
4. Servo calibration system included

⭐ 3. Modular 3D-Printed Body

1. 3D-printed head, torso, hips, and legs
2. Lightweight yet strong mechanical design
3. Servo holders integrated directly into joints
4. Easy to repair or customize

⭐ 4. 12–16 DOF (Degrees of Freedom)

Typical configuration:

1. Head: 2 DOF
2. Front legs: 2 DOF each
3. Back legs: 2 DOF each
4. Optional tail: 1–2 DOF
5. This allows the robot to perform expressive, lifelike motions.

⭐ 5. Onboard IMU (Inertial Measurement Unit)

1. MPU6050 or similar module
2. Real-time balance correction
3. Helps robot maintain posture while walking or being pushed

⭐ 6. Rich Sensor Support

Optional modules include:

1. Ultrasonic distance sensor
2. Edge detection IR sensors
3. Camera (ESP32-CAM / Raspberry Pi Camera)
4. Microphones
5. RGB LED expressive eyes

⭐ 7. AI & IoT Integration

1. Face tracking (with Raspberry Pi)
2. Voice commands
3. Wi-Fi / Bluetooth control
4. Gesture recognition
5. Autonomous exploration