Automatic Temperature Controlled Fan using Arduino

Abstract -In the current scenario, electricity availability has reached a critical stage, highlighting the need for efficient energy conservation. As the popular saying goes, “One unit saved is one unit generated.” This project introduces a standalone automatic fan speed controller that adjusts the fan speed based on ambient temperature, activating only when the temperature exceeds a predefined threshold. The system employs embedded technology to create an efficient and reliable closed-loop feedback control mechanism. An Arduino microcontroller forms the core of the system, enabling fast and dynamic control. The circuit is compact and constructed using minimal components, making it suitable for integration into various applications such as air conditioners, water heaters, snow melters, ovens, heat exchangers, mixers, furnaces, incubators, thermal baths, and veterinary operating tables. The LM35 temperature sensor detects the surrounding temperature and converts it into an electrical signal, which is sent to the Arduino. Based on this input, the microcontroller controls a transistor that regulates the fan speed accordingly. The system operates using a regulated 9V, 1A power supply. This project is particularly useful in industrial settings for monitoring and controlling the temperature of boilers and other heat-sensitive equipment. Key Words: Arduino, LM35, PWM, Temperature, Cooling