using pic Microcontroller

1-c) Fig.2 shows the diagram of automatic temperature control. The desired temperature setting is entered using a keypad. The temperature of the area is measured using an analog temperature sensor, the LM35 is used for this. The pic reads the temperature every 10sec and compares it with the desired value. If the desired value is lower than the measured value, then the heater is turned ON to heat the area. If on the other hand, the measured value is higher than the desired value, then the fan is switched ON to cool off the area until the required temperature is reached. An LCD display shows the measured temperature continuously. (8 marks) Note: The LM35 is calibrated at 10mV/C. Draw a complete circuit diagram and write a complete code program. fig.2