PWM 3A 80W DC Motor Speed Controller Module

Adjustable 6V-28V 3A PWM DC Motor Speed Switch Governor Controller

The PWM DC Motor 3A Switch Governor Module (Model 222473) is a versatile and compact speed regulation solution designed for precise control of direct current loads. Utilizing Pulse-Width Modulation (PWM) technology, this controller regulates motor speed by adjusting the output duty cycle from 5% to 100% without sacrificing low-end torque. Operating across a flexible input range of 6V to 28V DC and supporting continuous currents up to 3A with a maximum output power of 80W, it provides smooth and reliable speed adjustment. Whether you are building DIY robotics, working on a Biggan Project in BD, or fine-tuning small automation systems, this governor switch module delivers reliable performance in a space-saving 50 x 32 x 15mm footprint.

Product Specifications

Features

• Smooth PWM regulation from 5% to 100% duty cycle for precise speed control.
• Wide input voltage support from 6V DC up to 28V DC.
• Delivers continuous output current up to 3A with maximum power handling of 80W.
• Integrated potentiometer with ON/OFF switch functionality for easy power control.
• Compact PCB design measuring only 50mm x 32mm x 15mm for straightforward integration.

Applications / Use Cases

• Speed control for small DC brush motors in electronic prototypes and BD school or university science exhibitions.
• Brightness control for low-voltage LED strips and DC lighting setups.
• Fan speed regulation in mini cooling systems and customized power supply boxes.
• Actuator speed tuning in robotics and DIY automation setups.
• Versatile speed governor module for custom Biggan Project setups across Bangladesh.

User Guide / How to Use

• Ensure the power supply is completely disconnected before wiring the module.
• Connect the DC power supply positive (+) to the Power+ terminal and negative (-) to the Power- terminal.
• Connect the DC motor lead wires to the Motor+ and Motor- terminals on the controller PCB.
• Double-check all terminal screw connections to ensure correct polarity and avoid short circuits.
• Turn the potentiometer knob clockwise to power ON the unit and gradually increase motor speed from 5% to 100%.

Frequently Asked Questions (FAQs)

• Q: Can I connect this speed controller directly to AC wall outlets?
  A: No, this unit operates exclusively on DC power between 6V and 28V DC. AC power will damage the controller.
• Q: Is this module compatible with brushless DC motors?
  A: No, this governor is designed specifically for standard brushed DC motors and passive DC resistive loads.
• Q: What happens if the motor draws more than 3A continuously?
  A: Exceeding the 3A continuous output rating or 80W limit may cause overheating and permanent damage to the board.
• Q: Does turning the knob all the way counterclockwise turn off the module?
  A: Yes, the integrated potentiometer includes a built-in switch function to power down the controller.

Challenges and Considerations

• Requires strict adherence to input polarity; reverse polarity input can damage board components.
• Not suitable for heavy-duty motors requiring continuous currents above 3A or starting surge currents over 80W.
• Heat dissipation must be considered if operating continuously at maximum output limits.

Compatibility

• Compatible with standard brushed DC motors rated between 6V and 28V DC.
• Works well with 6V, 12V, and 24V DC fan units, pump motors, and DC heating elements up to 80W total power.
• Ideal for integration into microcontroller projects (Arduino, Raspberry Pi peripheral power regulation) requiring manual speed overrides.

Future Enhancement Options

• Adding an inline fuse on the input line to protect against accidental short circuits or current spikes.
• Enclosing the circuit inside a custom 3D-printed case for enhanced safety and aesthetic finish.
• Installing an external digital voltmeter/ammeter display to monitor live system power draw.

Benefits

• Provides high electrical efficiency compared to linear voltage regulators by using PWM duty cycle switching.
• Maintains high motor torque even at reduced speed settings.
• Compact size allows easy installation inside cramped enclosures or custom electronics setups in standard BD projects.

Conclusion

The PWM DC Motor 3A Switch Governor Module (Model 222473) provides an efficient, user-friendly, and highly compact solution for regulating speed and power in small DC loads. With its wide 6V-28V input range, 80W power capacity, and integrated switch knob, it is an essential component for hobbyists, students, and engineers working on custom control systems and practical Biggan Project designs.

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