🔹 SG90 Servo vs. 28BYJ-48 Stepper: Side-by-Side Comparison
| Feature | SG90 Servo | 28BYJ-48 Stepper |
|---|---|---|
| Type | Servo Motor (Position Control) | Stepper Motor (Precise Step Control) |
| Movement | Rotates 0° to 180° | Rotates full 360° (in steps) |
| Control Method | PWM (Pulse Width Modulation) | Step sequence (ULN2003 driver) |
| Power | 5V (low power) | 5V (higher power draw) |
| Torque | Moderate (depends on load) | Higher torque than SG90 |
| Speed | Fast, but limited range (0-180°) | Slower but precise |
| Precision | Decent, but not super accurate | Very precise (2048 steps per full rotation) |
| Best For | Arms, joints, simple movements | CNC, precise control, rotation-based motion |
| Downside | Can’t do continuous full rotation | Needs a driver board (ULN2003) |
🔹 When to Use Each Motor?
✅ Use SG90 Servo if:
- You need quick position control (e.g., robotic arms, levers, pan/tilt).
- You need a lightweight and simple solution.
✅ Use 28BYJ-48 Stepper if:
- You need precise full rotation (e.g., wheels, sliders, CNC).
- You want higher torque for heavier loads.
🔹 Which One Should You Use?
- For humanoid robots? → SG90 for joints 🦾
- For precise movement? → 28BYJ-48 for fine control ⚙️
- For a wheeled robot? → 28BYJ-48 (if not using DC motors) 🚗
