DESIGN AND CONSTRUCTION OF FOUR-WAY TRAFFIC LIGHT

108 PAGES (13496 WORDS) Computer Engineering Project
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ABSTRACT
The project “microcontroller based intelligent traffic light system with automatic street light and warning light” was designed to tackle the traffic issues in the country so as to establish automatic traffic control and monitoring system with near perfection. 

The project intelligent traffic light with automatic street light and warning light is a complex microcontroller based project that was designed to control traffic on a four way road network.

The system is embedded with sensors that automatically detect lanes with traffic and lanes that are traffic free. Based on these input from the sensors the controlling system makes its decision. Nevertheless, the system also comes with automatic street light controller that automatically switches on the street lights once there is darkness while offing the lights once the weather is bright. Further more, the warning light blinks before transitioning from one state to another (e.g from stop to ready or go).

In this design we have implored the use of both hardware and software to bring about the entire project. The hardware components are solely coordinated by the AT89S51 micro controller chip while the programming language is used to program the chip.

TABLE OF CONTENTS

CHAPTER ONE: INTRODUCTION
Background of project
objective of the project              
Justification of the project
Scope of project
Constraints
Block overview of the stages
Project report organization  

CHAPTER TWO
SYSTEM ANALYSIS AND DESIGN 
Project specification
Component description/analysis
Step down transformer            
Diodes
Light emitting diodes or LED’s      
Bridge rectifier
Voltage regulators
Resistor
Transistors
Light dependant resistor (LDR)
Electromechanical relay
Hardware subsystem  

CHAPTER THREE
SYSTEM IMPLEMENTATION
Conceptual overview of project layout
Design process
Software design
Software development
Development process
Compiling and linking
Making an led blink with AT89C51 micro-controller
System control programme steps

CHAPTER FOUR: TESTING
System testing and integration              
Test plan and test data  
Component test
System test  
Transformer test (step-down)
Other test
Experimented result/actual result
Performance evaluation

CHAPTER FIVE: SUMMARY
Summary and Conclusion
Summary of achievement
Problems enc6ountered and solution
Suggestions for further improvement     
Conclusion  
References

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