An RTD stands for “Resistance Temperature Detector” and it is a sensor whose resistance changes when its temperature changes and it is used to measure temperature. The RTD's resistance increases linearly when the temperature increases. Many RTDs are called wire wound. This project aims to design a temperature measurement system using the DS18B20 temperature sensor, a relay, LM358 comparator, a fan, and a potentiometer. The DS18B20 sensor provides accurate digital temperature readings, which are compared against a user-defined setpoint using the LM358 comparator. When the measured temperature exceeds the setpoint, the comparator triggers the relay, activating the fan to cool the environment. The potentiometer allows for easy adjustment of the setpoint temperature. This system provides a simple yet effective way to regulate temperature in various applications, such as climate control in enclosed spaces or electronic devices.  

The main objectives of the project are:

1. Design a RTD (Resistance Temperature Detector) system.
2. Continuous monitoring of temperature.
3. Automatic controlling of FAN.

  The major building blocks of this project are:  

1. Regulated power supply.
2. Comparator
3. DS18B20 temperature sensor.
4. Relay
5. POT
6. Fan

Regulated power supply:

   

Block Diagram:

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