DESIGN AND CONSTRUCTION OF FOUR-WAY TRAFFIC LIGHT

ABSTRACTThe 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 CONTENTSCHAPTER ONE: INTRODUCTIONBackground of project      1.0 objective of the project   1.1Justification of the project1.2Scope of project1.3Constraints1.4Block overview of the stages1.5Project report organization 1.6
CHAPTER TWOSYSTEM ANALYSIS AND DESIGN Project specification 2.1Component description/analysis2.2Step down transformer             2.2.1Diodes       2.2.2Light emitting diodes or LED’s 2.2.3Bridge rectifier      2.2.4Voltage regulators 2.2.5Resistor       2.2.6Transistors 2.2.7Light dependant resistor (LDR)2.2.8Electromechanical relay 2.2.9Hardware subsystem  2.3
CHAPTER THREESYSTEM IMPLEMENTATIONConceptual overview of project layout3.1Design process 3.2Software design 3.3Software development 3.4.1Development process3.4.2Compiling and linking 3.4.3Making an led blink with AT89C51 micro-controller  3.4.4System control programme steps    3.4.5
CHAPTER FOUR: TESTINGSystem testing and integration 4.1Test plan and test data4.2Component test4.2.1System test   4.2.2Transformer test (step-down)4.2.3Other test      4.2.4Experimented result/actual result4.3Performance evaluation4.4
CHAPTER FIVE: SUMMARYSummary and Conclusion5.1Summary of achievement 5.2Problems encountered and solution 5.3Suggestions for further improvement 5.4Conclusion  5.5References