Real-Time Smart Fan Speed Adjustment with Buzzer Alerts for Environmental Temperature

This paper presents an automated temperature monitoring and control system utilizing Arduino, designed to manage temperature-dependent operations efficiently. The system integrates an LM35 temperature sensor, a fan, a relay, an LED, a buzzer, and an LCD display to monitor and control environmental conditions. The LM35 sensor measures real-time temperature, which is displayed on the LCD and used to regulate the fan speed through Pulse Width Modulation (PWM) based on predefined thresholds. A relay module ensures power supply control, while the LED provides visual feedback for high-temperature conditions. The buzzer alerts users during critical temperature levels. This system is capable of dynamic fan speed adjustment, ensuring energy efficiency and system reliability. The proposed solution is simple, cost-effective, and scalable for applications in industrial, residential, and agricultural environments. Experimental results demonstrate the system’s effectiveness in maintaining desired temperature levels and providing user feedback, highlighting its potential for real-world implementations.