90W 5A DC Motor Driver (4.5–35V) — PWM Speed Controller/Dimmer Module⚙️

Compact and efficient, this DC motor driver delivers smooth PWM speed control for brushed DC motors across a wide 4.5–35V DC range. Ideal for Arduino, Raspberry Pi, and other microcontroller-based projects, it combines high current capability with an ultrasonic 20 kHz PWM frequency for quiet operation. Perfect for hobbyists and engineers integrating reliable electronics components and modules into robotics, automation, and prototyping.

🔑 Key Highlights

• Wide input voltage: DC 4.5–35V for versatile applications
• High output current: up to 5A (see power note below)
• Maximum output power: 90W
• Ultrasonic PWM: 20 kHz for low-noise motor drive
• Ultra-low standby: 7 μA quiescent current
• Onboard potentiometer: smooth speed control from 1%–100% duty cycle
• Compact footprint: 30 × 26 × 14 mm board size

🧾 Technical Specifications

• Operating voltage: DC 4.5V–35V
• Output current: 0–5A
• Maximum output power: 90W
• Quiescent current: 7 μA (standby mode)
• PWM duty cycle: 1%–100%
• PWM frequency: 20 kHz
• Dimensions (board): 30 mm × 26 mm × 14 mm

🤝 Compatibility & Applications

• Works with Arduino, Raspberry Pi, ESP32, and other microcontroller platforms
• Suitable for brushed DC motors, blowers, pumps, and other compatible DC loads within ratings
• Great for robotics, CNC feeders, model making, and general electronics prototyping

🔌 Wiring & Operation

• Connect a suitable DC power supply (4.5–35V) to the input terminals, observing correct polarity.
• Connect the motor to the output terminals (M+ and M-).
• Rotate the onboard potentiometer to adjust motor speed (duty cycle from 1% to 100%).
• To reverse rotation direction, swap the motor leads on M+ and M-.

⚠️ Safety & Usage Precautions

1. DC input only: Do not connect to AC mains (e.g., 220V AC). Doing so will damage the device.
2. Do not reverse supply polarity: Reversing the DC input may cause immediate failure.
3. Direction control: If rotation is opposite to your requirement, swap the M- and M+ lines.
4. Speed control: Motor speed is adjusted via the built-in potentiometer.

Power note: The module is limited to 90W maximum output. Ensure V × I ≤ 90W. Examples: at 12V, up to 5A (60W) is acceptable; at 24V, limit current to ≤3.75A.

🛠️ Engineering Tips

• Ensure adequate heat dissipation when operating near maximum load.
• Use a properly rated power supply to avoid voltage sag and to deliver the required current.
• Keep wiring short and secure; consider external transient suppression for inductive loads as needed.

📦 Package Contents

• 1 × PWM DC motor speed controller module