DESIGN AND SIMULATION OF TEMPERATURE CONTROL OF CHAMBER BASED ON AUTOMATIC FAN SPEED CONTROL

Abstract

This paper presents the design and implement of
microcontroller based temperature control using electric fan.
The electric fan automatically switches the speed according to
change inner temperature of the box. The system contain LM35
temperature sensor, 89C51 microcontroller, fan interface circuit
and the box. This inner temperature is compared with the set
value by the user and if the temperature above the set values the
fan ON as per the requirement and if the temperature below the
set values the fan OFF automatic.