The Temperature-Controlled Fan using Arduino is a simple automation project that adjusts fan speed based on surrounding temperature. Using a temperature sensor, the Arduino monitors the environment and increases or decreases fan speed accordingly.

This project is widely used in homes, server rooms, and industrial setups to maintain a comfortable or safe temperature without manual control. It demonstrates the integration of sensors with microcontrollers for smart automation.

Parts Used:

1. Arduino Uno / Nano – Main controller
2. Temperature Sensor (LM35 / DHT11 / DS18B20) – Reads temperature
3. DC Fan – Cooling system
4. Motor Driver / Transistor (MOSFET/BC547) – Controls fan power
5. LCD Display (16×2 / OLED, optional) – Shows real-time temperature
6. Relay Module (if AC fan is used) – Switches high voltage
7. Power Supply (Battery/Adapter) – Runs Arduino and fan