Smart Fan Regulator | Automatic & Energy-Saving Fan Control

Introduction

A smart fan regulator automatically controls fan speed based on room conditions. It improves comfort, saves electricity, and removes the need for manual speed adjustment.

Project Overview

This project uses a temperature sensor and a controller circuit to adjust fan speed automatically. As room temperature increases, the fan speed increases, and it slows down when the temperature drops.

Components Required

• Microcontroller (Arduino / ESP8266)

• Temperature Sensor (LM35 / DHT11)

• Triac (BT136)

• Optocoupler (MOC3021)

• Zero Crossing Detector

• Potentiometer (optional manual control)

• AC Fan

• Power Supply

Circuit Explanation

• Temperature sensor measures room temperature

• Controller processes the data

• Triac controls AC fan speed using phase control

• Speed changes automatically based on temperature

Working Steps

1. Sense room temperature

2. Compare with preset values

3. Adjust fan speed automatically

4. Optional manual override

Features

• Automatic speed control

• Energy efficient

• Smooth fan operation

• Manual + auto mode

Applications

• Homes

• Offices

• Server rooms

Safety Tips

• Proper isolation for AC circuits

• Use heat sink with triac

• Enclose high-voltage parts

Conclusion

A smart fan regulator is a useful DIY electronics project that provides comfort and saves energy. It’s ideal for modern homes and automation systems.

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