Design And Implementation Of A Temperature Control Fan Using Arduino As Microcontroller

ABSTRACT

The accurate room temperature controller is designed with arduino 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 than 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 than 20 0C. The system is programmed to run the fan at its maximum speed at 40 0C. Therefore the fan speed varies linearly between 20 0C to 40 0C, and Whenever the temperature will be increase fan speed will also be increase and vice versa.

CHAPTER ONE

1.0                                                        INTRODUCTION

The main purpose of this Digital Temperature Controller is to control the temperature of any device like fan or any other electronic devices whose temperature keeps fluctuating and thus requires a constant watch on the device. The use of this system eliminates constant watching on the device by self controlling the temperature of the system.

This work consists of digital temperature sensors for more accurate temperature control in various industries. This system overcomes the disadvantages of thermostat/analog systems in terms of accuracy. This system can be used in any firm or organization where it is very important to maintain precise temperatures. LCD display is used to display the temperature and when the temperature exceeds the set limit.

In this project Arduino Uno forms the processing part. Arduino Uno senses the temperature and control the speed with the set temperature. The system uses a digital temperature sensor (lm35) in order to detect temperature and pass on the data to the arduino. This is set by the user. When the current temperature is greater than or equal to the set temperature the fan turned on otherwise it will stay off. For turning on here should be two condition supposed to be true. One is object detection and other one is temperature should be appearing at set temperature. After turning on the fan speed will be change accordingly with temperature. Whenever the temperature will be increase fan speed will be increase.

The arduino processes data and sends the temperature to be displayed on LCD screen. The display consists of 7 segment display unit to display up to 4 numbers. It consists of 4 push buttons for setting the high and low temperatures. Pressing set button allows user to increment and decrement high and low temperatures.

1.2                                         BACKGROUND OF THE PROJECT

Nowadays, the fan is widely used especially in warm countries including Nigeria. Usually the conventional fan is always cooling the room depending on the fixed regulator setting and is not automatically adjusted for the comfort of the users. In the fan control field, excellent real-time, high reliability, and good intelligence are proposed by many researchers. The traditional PID algorithm is, in fact, still playing a main role in the control process. The air conditioning system has becoming a field to be researched to improve the user convenience by applying intelligent system such as THERMISTOR.

While the enhanced fan is being designed, the consideration of the type of control system must be included in a modeling design. In particular the controller must be able to avoid the inefficiency of having the fan operate all the time. Several control options were considered at presence sensing circuit, which would turn the fan off when people are not in the room with the fan and a temperature sensor input, which would change the fan operation depending on room temperature [1]. Based on the observation of the using the present conventional fan application, it always working all the time without a systematic control. Therefore, the control of the fan is adjusted through a feedback control system to monitor and maintain a constant temperature based on the data input from the sensor.

1.2                                   AIM OF THE PROJECT

The main aim of this work is build a circuit that controls fan speed. The speed of the fan will be change accordingly with temperature of the room the fan is been used.

1.3                            OBJECTIVES OF THE PROJECT

The objectives of this project are:

1. To control the speed of a fan according the set room temperature.
2. To design a controller using temperature sensor.
3. To analyses the performance of the

1.4                                                              PROBLEM STATEMENT

The problem happens when the fan is still functioning although in the event of cold weather. The function is uncontrolled and must be manually turned on and off. Sometimes it can lead to high usage of electricity which in turn raises the electricity bill when the user forgot to switch it off. The system also does not have the capacity to adjust the room temperature regardless of the ambient temperature. To address the problem, the automatic room temperature control that can control the temperature automatically is proposed.

1.5                              PURPOSE OF THE PROJECT

The main purpose of this Digital Temperature Controller is to control the temperature of any device like fan or any other electronic devices whose temperature keeps fluctuating and thus requires a constant watch on the device.

1.6                                  SCOPE OF THE PROJECT

Below are the scopes of the project:

1. The controller used is lm35
2. Inside and outside room temperature are used in the controller

• The analysis controller performance in terms of automatic temperature control fan based on the environmental temperature.

1.7                                          APPLICATION OF THE PROJECT

This device can be used for temperature control electrical appliances such as:

1. Air conditioner
2. Refrigerator

• Fan,

1. furnace etc.

1.8                          SIGNIFICANCE OF THE PROJECT

The advantages of such a system are less energy usage, and provides more convenient to the consumers.

1.9                                        PROJECT WORK ORGANISATION

The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:

Chapter one of this work is on the introduction to this study. In this chapter, the background, significance, aim, objective limitation and problem of this work was discussed.

Chapter two is on literature review of the study. In this chapter, all the literature pertaining to this work was reviewed.

Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.

Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.

Chapter five is on conclusion, recommendation and references.