Abstract: This project presents the design and implementation of a temperature control fan system that automatically adjusts its speed based on the surrounding temperature. The primary objective is to provide an energy-efficient solution for maintaining optimal environmental conditions, especially in areas where temperature fluctuations can affect comfort, safety, or equipment performance. The system utilizes a temperature sensor (such as LM35 or DHT11) to continuously monitor ambient temperature. The sensor data is processed by a microcontroller (e.g., Arduino), which controls the fan speed using pulse-width modulation (PWM) or relay switching mechanisms. The fan activates or increases its speed proportionally when the temperature exceeds a predefined threshold, but slows down as the temperature decreases. This intelligent fan system is applicable in-home automation, electronics cooling, greenhouses, and other temperature-sensitive environments. The project demonstrates the effective use of sensors and automation to create a responsive and energy-saving cooling solution.
Keywords: temperature sensor, PWM control, microcontroller, fan, HVAC automation
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