The Otto Humanoid Robot is an upgraded version of the popular Otto DIY Robot, enhanced with arms, a head, expressive features, and advanced motion capabilities. Designed for education and personal robotics, Otto Humanoid integrates human-like movement, gesture interaction, and 3D-printed modular components, making it an ideal project for students, hobbyists, educators, and robotics competitions.

It combines Otto’s charm and simplicity with humanoid features such as walking, turning, arm waving, dancing, emotion expressions, and more advanced behaviors like gesture control, obstacle avoidance, and Bluetooth interaction.

Key Features

🧍‍♂️ 1. Humanoid Body Structure

The robot includes:

1. Head (with ultrasonic “eyes”)
2. Torso
3. Two arms with servos for movement
4. Two legs with 2–3 DOF
5. Feet for stability and walking

The structure is fully 3D-printed, modular, and customizable.

2. Multi–Degree-of-Freedom (DOF) Movement

Typical Otto Humanoid configuration:

1. Head: 1–2 DOF (optional pan/tilt)
2. Arms: 2 DOF each (shoulder pitch + shoulder roll)
3. Legs: 3 DOF each (hip pitch, hip roll, knee)
4. Total: 10–14 DOF depending on the version

This allows:

1. Walking
2. Side-stepping
3. Turning
4. Arm waving
5. Dancing
6. Posing
7. Gesture animations

3. Smart Interactive Head

The Otto head includes:

1. Ultrasonic sensor → robotic eyes
2. LED matrix mouth (optional)
3. Buzzer → sound effects
4. Camera module (ESP32-CAM) → face detection (optional)

This gives the robot a personality and emotional expressions.

4. Electronics & Microcontroller

Supports:

1. Arduino Nano / Arduino Mega
2. ESP32 (for Wi-Fi + Bluetooth + AI features)
3. PCA9685 servo driver (smooth servo control for 10–14 DOF)

Other modules:

1. IMU (MPU6050) for balance
2. HC-05 Bluetooth module
3. Touch sensors
4. Voice module

🛠️ 5. 100% 3D-Printable Design

All parts are printed using:

1. PLA (most common)
2. PETG (stronger)
3. ABS (more durable)

Modular design allows:

1. Easy repairs
2. Upgrades
3. Color variations
4. Custom arms or legs

🤹‍♂️ 6. Movements & Abilities

Otto Humanoid can perform:

1. Walking forward/backward
2. Left & right turning
3. Side walks
4. Dance routines
5. Arm waving
6. Robot greetings
7. Push-up motion
8. Balance correction (with IMU)
9. Personality animations

7. Control Options

1. Bluetooth mobile app
2. Wi-Fi (ESP32 web control)
3. IR remote
4. Autonomous modes
5. Voice command (optional)
6. Gesture-controlled (with MPU or glove controller)

Applications

1. STEM education
2. Robotics club projects
3. School/college major projects
4. Humanoid gait experiment
5. Kids coding & maker workshops
6. Human–robot interaction learning
7. Entertainment and hobby robotics