Through our project we are showing the control of constant temperature according to the desired value (set point) in a closed loop using PID controller system. For this we are using a microcontroller,a temperature sensor for sensing the temperature of thenclosed loops. By using the microcontroller we compare the desired value with current value and it is displayed in the LCD.Also to provide the constant temperature, Fan or a heater is turned on or off according with the variations of current temperature in the from desired set point.

PID Controller, Microcontroller, Sensors.