Temperature Dependent Speed Controller Using Thermistor Computer Science Essay

Temperature Dependent Speed Controller Using Thermistor Computer Science Essay This project is a standalone automatic fan speed controller that controls the speed of an electric fan according to our requirement. This closed loop feedback control system is efficient and reliable by using embedded technology . Micro controller (AT89C51) allows dynamic and faster control. Liquid crystal display (LCD) makes the system user-friendly. The sensed temperature and fan speed level values are simultaneously displayed on the LCD panel. It is very compact using few components and can be implemented for several applications including air-conditioners, water-heaters, snow meltars, ovens, heat-exchangers, mixers, furnaces, incubators, thermal baths and veterinary operating tables. AT89C51 micro controller is the heart of the circuit as it controls all the functions. The temperature sensor thermistor senses the temperature and converts it into an electrical (analog) signal, which is applied to the micro controller through ADC.