This Project aims in designing a system which is used to control the fan speed according to the temperature and it also indicates the temperature value on the LCD (Liquid Crystal Display). The system will get the temperature from the temperature sensor and it will control the speed according the values stored in the code. The System is fully controlled by the microcontroller.   Temperature Monitoring systems are in huge requirement and we definitely can find their advantages in many industrial sectors and also in residential sector. We can find many kinds of temperature monitoring systems for different uses but the major challenge is to design a very simple, user-friendly and cost-effective system. Employing this method we can save the energy.   In this project temperature sensor is used to measure the temperature value. The temperature values are fed to the microcontroller. According to the received temperature values, microcontroller turns ON/OFF the Transistor by using duty cycle. Transistor acts as a regulator and hence speed of the fan is controlled. The temperature value is displayed on the LCD.          

The major objectives of this system are:  

1. Automatic controlling of fan speed based on temperature.
2. To display the Temperature using LCD display.

           

The main building blocks of the project are:

1. Regulated Power Supply.
2. PIC Microcontroller.
3. Temperature sensor.
4. Transistor
5. LCD driver.
6. LCD.
7. Crystal oscillator.
8. Reset buttons.
9. LED indicators.
10. Fan.

           

Software’s used:

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

               

Regulated Power Supply:

                       

Block Diagram:            

video: