This project entitled “AUTOMATIC WEATHER CONTROL OF CAR AIR-CONDITIONING SYSTEM”, is designed and implemented using PIC microcontroller, an IC manufactured by Microchip Corporation. 

In this project, according to the external and cabin temperature, the hot air from the heater and cold air from the Air Conditioner is mixed automatically and hence easy and efficient  Air Conditioning is achieved.  This mechanism involves the control of the duct mechanism present in the Air Conditioner setup by using a stepper motor. 

Automatic Weather Control

The advantages of our project are 

  • Economical
  • Easy Installation
  • Compact

DISCUSSION OF RESULTS 

We have presented a method for making the air-conditioning system in a car, run efficiently and automatically. Our Automatic weather control system has provided a simpler way of air-condition control. 

FUTURE WORK 

This efficient control mechanism can be further developed to control the Air Conditioner throw by controlling the blower motor. 

The vent mechanism in the car Air Conditioner can also be automated by this efficient method.

TABLE OF CONTENTS

 

TITLE

ACKNOWLEDGEMENT
ABSTRACT
LIST OF FIGURES
LIST OF TABLES                                          
INTRODUCTION                                                   
1.1 Synopsis                                  
INTRODUCTION TO EMBEDDED SYSTEM   
2.1       Embedded System Tools

     2.1.1     Microprocessor

     2.1.2     Microcontroller

     2.1.3     Advantages Of Using Microcontroller Over

                  Microprocessor

2.2       Design of Embedded Systems
MICRO CONTROLLER PIC 16F877A
3.1     General
3.2     Pin Diagram of PIC 16F874A/877A
3.3     Applications
3.4       Ports

     3.4.1     PORTB and TRISB

     2.1.2     PORTA and TRISA

3.5       Functional Block Diagram of PIC 16F877A

 

SOFTWARE DESCRIPTION
4.1     Software Tools

     4.1.1     MPLAB Integration

     4.1.2     Introduction to Embedded ‘C’:

     4.1.3     Embedded C Compiler

 

4.2     Embedded Development Environment

 

4.3     Embedded System Tools

     4.3.1     Assembler

     4.3.2     Simulator

     4.3.3     UMPS

          4.3.3.1     UMPS Key Features

     4.3.4     Compiler

          4.3.4.1     Phases Of Compiler

PROJECT DESCRIPTION
5.1     Block Diagram
5.2     Circuit Diagram           

      5.2.1     Hardware Circuit Diagram Explanation                

5.3     Components and its Function:

      5.3.1   Resistors

      5.3.2   Capacitor

5.4.      Power Supply

     5.4.1     Power Supply Layout

     5.4.2     General

     5.4.3     IC Voltage Regulators

     5.4.4     Three-Terminal Voltage Regulators

     5.4.5     Fixed Positive Voltage Regulators

5.5       Printed Circuit Board

     5.5.1     Introduction

          5.5.1.1     Advantages of PCB

          5.5.1.2     Types of PCB

          5.5.1.3     Do’s and Don’ts

          5.5.1.4     Tips to Simplify PCB Manufacturing

    5.5.2     PCB Layout

5.6     Liquid Crystal Display:

     5.6.1     Liquid Crystal and Other Display

          5.6.1.1     General

5.6.1.2        Filament Display

5.6.1.3        Gas Discharge Display

5.6.1.4         Fluorescent Vacuum Display

     5.6.2     Interfacing withHitachi44780

5.7     LM35 Precision Centigrade Temperature Sensors

     5.7.1     General Description

     5.7.2     Features

     5.7.3     Absolute Maximum Ratings

5.7.4     Connection Diagrams

     5.7.5     Electrical Characteristics

     5.7.6     Typical Performance Characteristics

     5.7.7     Temperature Rise of LM35 Due to Self-Heating

     5.7.8     Applications

5.8       Stepper Motor Description
5.9       High-Voltage, High-CurrentDarlingtonArrays
CONCLUSION
 3.1 Discussion of Results

 3.2 Future Work

 

APPENDIX-I

        Sample Coding

APPENDIX-II

         Abbreviations

REFERENCES