DESIGN AND CONTRUCTION OF A TEMPERATURE CONTROLLED FAN SPEED
BY
EGBUDIWE INNOCENT .N
EE/2007/181
BEING A PROJECT SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENT FOR THE AWARD OF BACHELOR OF ENGINEERING (B.ENG) DEGREE IN ELECTRICAL/ELECTRONIC ENGINEERING CARITAS UNIVERSITY, AMORJI-NIKE ENUGU.
AUGUST 2017
CERTIFICATION
This is to certify that this work was carried out by, EGBUDIWE .N. INNOCENT of the department of Electrical/Electronic Engineering, Caritas University Amorji-nike, Enugu.
___________________ Date: _____________
Engr. E.C. Aneke
Project Supervisor
___________________ Date: ________________
Engr. C.O Ejimofor
Head of Department
__________________ Date: ________________
External supervisor
The work is dedicated to the almighty God who with all his conglomerate efforts made my dream come true.
My Profound gratitude goes to God Almighty who gave me good health and the strength throughout the period of this project. To my parents and siblings, I say a very big thank you for your financial and moral support during and after the completion of this project.
The temperature-controlled fan designed with microcontroller is quite useful for conference halls, auditoriums, cinema halls, and other commercial organizations where many people gathered together, and lot of fans are required at these places. Depending up on the weather condition, organizers of the above places are supposed to be control each and every fan, otherwise lot of energy will be wasted. Controlling each and every fan manually is highly impossible; there by this project work is taken up, which controls the fan automatically depending upon the temperature. Here for the demonstration purpose single fan is considered, but in practical all the fans can be connected to this single instrument, so that all the fans rotates equally. The basic concept of this project work is, depending upon the room temperature to control the fan speed automatically. Since our weather conditions are widely varied, temperature up and downs are common in our country. When the temperature is less then 20 0C fan is not required, there by a facility is provided in the system that the fan will be switched off automatically at less then 20 0C. The system is programmed to run the fan at its maximum speed at 40 0C. There fore the fan speed varies linearly between 20 0C to 40 0C.
Semi conducting device is used as temperature sensor, the output of this sensor is amplified and fed to A/D converter for converting the analog information produced according to the temperature into digital. The ADC is interfaced with microconroller, depending up on the digital value proportionate to the temperature, the controller displays in degree centigrade at the same time, the controller also generates square pulses which are applied to the thyristor gate through opto-isolator. Depending up on the duty cycle, fan speed can be controlled automatically with this device.
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