Arduino Based Temperature Control with PID Controller as Overheat Protector

Abstract

This paper describes a proportional, integral, derivative (PID) temperature controller for overheat protection that is Arduino-based. To regulate and prevent the temperature from rising above a certain threshold, it includes an Arduino UNO board, LM35 temperature sensor, relay, and cooling fan. The system collects temperature readings from the LM35 and delivers them to the Arduino UNO, which processes the data and regulates the output to the relay using a PID algorithm. Depending on the current temperature and the previously specified limit, the relay then turns on and off the cooling fan. The mechanism is made to keep the device's temperature at or below the set point and to stop it from getting too hot, which could harm its internal parts. The experimental results demonstrate the effectiveness of the proposed controller within a range from 25°C to 50°C. The proposed approach would be useful in various temperature-related applications where PID temperature controllers act as overheat protector when lower limit temperature is set above the upper limit temperature.