The project aims to design and implement a smart BLDC fan motor speed control system using an Arduino Uno microcontroller and a keypad-based user interface. The system allows users to control the speed of the BLDC fan by pressing dedicated keypad buttons, where each button corresponds to a predefined speed level. This provides a simple, reliable, and user-friendly method for adjusting fan speed according to user requirements. The system also incorporates a temperature sensor to continuously monitor ambient temperature and display both the current temperature and selected fan speed on an LCD screen in real time. To enhance safety, a buzzer-based alert mechanism is included to notify the user whenever the temperature exceeds a preset threshold value. The proposed system offers efficient motor control, real-time monitoring, improved user interaction, and temperature-based safety alerts, making it suitable for smart home appliances, industrial cooling systems, and energy-efficient ventilation applications.      

The main objectives of the project are:

• To design and implement a speed control system for a BLDC Fan motor using an Arduino Uno and a Keypad based control method.
• To provide user-friendly control through keypad, each corresponding to a predefined speed level.
• To display real-time speed levels and Temperature on an LCD screen for easy monitoring and user interaction.
• High temperature alerts using Buzzer.

   

The major building blocks of the project are:

1. Regulated Power Supply.
2. Arduino UNO microcontroller.
3. 4X4 keypad
4. BLDC fan motor
5. IR sensor
6. LCD display.
7. Temperature sensor.
8. Buzzer.

    Software’s used:  

• Embedded C programming.
• Arduino IDE for dumping code into Micro controller.
• Express SCH for Circuit design.

      Regulated Power Supply:

                 

BLOCK DIAGRAM:    

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