Fan Speed Controller by using Plus Width Modulation and Temperature Sensor LM35

Abstract

The temperature is very important for many applications, scientific and engineering fields and more, so was the greatest concern of scientists and engineers, especially in the field of industry and automation to take their attention and design circuits to measurement temperature and control it after the expansion and progress in the automation and control field. This paper presents the idea of temperature control for any device is controlled according to its requirements for any industrial application. It also displays the temperature on the LCD display in the range -50 ° C to + 120 ° C. So that the LM35 temperature device is connected to the Arduino circuit, this, in turn, converts this reading and displays it on the screen. This is a new design to control fan speed based on temperature by using (PWM) technology, it is small and simple circuit that helps control and automate processes where maximum and maximum temperature can be set up as quickly as possible in the Arduino panel. Then Arduino generates output (PWM) on the corresponding digital output according to the measured temperature. The fan speed matches the measured temperature. A standard power supply of 12volt and 5 volts is provided through the regulator. This system works correctly and design is suitable according to laboratory needs, industrial and modern technology.( PWM) technology is suitable for fan speed according to ambient temperature and the results were satisfactory and practical according to schedule.