3.7V-5V DC Fan Controller Board with 3-Speed USB

Rechargeable DC Fan Controller Board 3.7V 3-Speed USB Module

The DC Fan Circuit Board is a compact and efficient control solution designed for rechargeable mini fan systems. It enables smooth 3-speed control, allowing users to adjust airflow based on their needs. Powered by a 3.7V 18650 lithium battery, this module integrates a Micro USB charging interface and LED indicators to simplify operation and monitoring.

This controller board is widely used in DIY electronics projects across Bangladesh (BD), especially by hobbyists and engineers working with portable fan systems. At Biggan Project, such modules are popular for their reliability and ease of integration into custom builds. Whether you are repairing a mini fan or building one from scratch, this board provides a practical and cost-effective solution.

Product Specifications

Features

• 3-speed control for flexible airflow adjustment
• Supports 3.7V 18650 rechargeable lithium battery
• Built-in Micro USB charging port for convenience
• LED indicators for clear charging and power status
• Compact and lightweight design for easy integration
• Stable performance suitable for long-term usage

Applications / Use Cases

• Rechargeable mini fan repair and replacement
• DIY portable fan projects
• Custom cooling solutions
• Educational electronics experiments in BD
• Battery-powered airflow systems

User Guide / How to Use

• Connect a 3.7V 18650 battery to the input terminals
• Attach the DC fan motor to the output terminals
• Use the onboard button to switch between speed levels
• Charge the battery via Micro USB when needed
• Observe LED indicators for charging and power status

Frequently Asked Questions (FAQs)

• Q: Can I use this board with any DC fan?
  A: It is best suited for small DC fans designed for 3.7V systems.
• Q: Does it support fast charging?
  A: It supports up to 5V 2A input via Micro USB.
• Q: Can I use other batteries instead of 18650?
  A: It is optimized for 3.7V 18650 lithium batteries for best performance.
• Q: Is this suitable for DIY projects?
  A: Yes, it is widely used in DIY and educational projects at Biggan Project.

Challenges and Considerations

• Ensure correct battery polarity during connection
• Avoid using higher voltage batteries
• Not suitable for high-power or large industrial fans
• Proper insulation is required during installation

Compatibility

• 3.7V 18650 lithium batteries
• Low-power DC fan motors
• Micro USB power sources
• DIY electronics platforms and custom builds

Future Enhancement Options

• Add battery protection module for safety
• Integrate higher capacity battery packs
• Upgrade to Type-C charging interface
• Combine with solar charging systems

Benefits

• Simple and user-friendly operation
• Cost-effective solution for mini fan control
• Portable and energy-efficient design
• Widely available and easy to integrate in BD market
• Ideal for both beginners and professionals

Conclusion

The DC Fan Circuit Board is a practical and versatile solution for controlling rechargeable mini fans. With its 3-speed functionality, USB charging, and compatibility with 18650 batteries, it is a reliable choice for DIY enthusiasts and professionals in Bangladesh. Available through platforms like Biggan Project, this module delivers efficiency, simplicity, and flexibility for various electronic applications.

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