Abstract: This project investigates the design and implementation of an automatic temperature-based fan speed controller with digital use a fan speed controller Arduino. The system employs a temperature sensors to continuously monitor the ambient temperature, and Arduino microcontroller processes this data to dynamically adjust fan speed accordingly. By integrating a feedback loop, the   controller ensures efficient cooling while minimizing energy consumption. The project aims to provide a cost-effective and user-friendly solution for maintaining optimal temperature conditions in various environments, contributing to energy efficiency and automated

Keywords: Temperature, Fan, Speed, PWM.

| DOI: 10.17148/IARJSET.2024.115115