traffic signals based on microcontroller based

BY

R.SURESH (16705A0426)

B TECH II Year I Sem

ELECTRONICS & COMMUNICATION ENGINEERING

ANNAMACHARYA INSTITUTE OF TECHNOLOGY AND SCIENCES

(AN AUTONOMOUS INSTITUTION)(Approved by AICTE,NEW DELHI & Affiliated to J.N.T.U Anantapuramu)

New Boyanapalli, RAJAMPET-516 126 (A.P)

A TECHNICAL SEMINAR

ON

MICROCONTROLLER BASED TRAFFIC SIGNALING SYSTEM

CONTENTS

INTRODUCTION

HISTORY

FLOW CHART

MICRO CONTROLLER

PIN DIAGRAM

CIRCUIT DIAGRAM

HARD WARE DESCRIPTION

ADVANTAGES

CONCLUSION

REFERENCES

INTRODUCTION

The congestion has been causing many critical problems and most populated cities. To travel to different places within the city is becoming more difficult for the traveler in traffic. Due to these congestion problems, people lose time, miss opportunities, and to traffic congestions there is a loss in productivity from workers, trade opportunities are lost delivery gets delayed, and there by the cost on increasing.

HISTORY

A traffic light is a device that is designed to control the flow of traffic by using three colored lights. These lights are mainly green, Yellow and Red. In 1860’s London, the first traffic control device had arms that extended out to command drivers on how to react at an intersection. The first four way three colour traffic light did not come until December 1920’s in Detroit.

FLOW CHART

START

INITIALIZE TIME 0 AS TIMER

MOVE NEXT SIGNALLING DATA ON TO THE PORT PINS

& START THE TIMEER

LOAD DEALY VALUE IN TIMER

UPDATE THE LCD DISPLAY

IS THE DELAY

COMPLETED

Yes No

MICRO CONTROLLER

A microcontroller (or MCU, short for microcontroller unit) is a small computer on a single IC containing a processor core, memory, and programmable input/output peripherals. Program memory in the form of RAM, NOR Flash or OTP ROM is also often included on chip, as well as a typically small amount of RAM. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general purpose applications consisting of various discrete chips.

AT89S52 PIN DIAGRAM

AT89S52 FEATURES

8K bytes of in-system reprogrammable flash memory

fully static operation:0Hz to 24MHZ There level program memory 32 programmable i/o lines Three 16-bit timer/counters 8 interrupt sources

CIRCUIT DIAGRAM

HARD WARE DESCRIPTION

STEP DOWN TRANSFORMER FILTER

REGULATOR

RECTIFIER230v AC

5v DC

ADVANTAGES1. Reduction of vehicle-pedestrian conflicts.2. Waiting time can be reduced or increased.3. Duration of green light can be adapted to the users need.

CONCLUSION

Use of microcontroller instead of other controllers such as PLC makes the smart traffic controller hardware a low cost system

The program downloaded into the microcontroller enables it to have a high accuracy timing, high independency and consistently

It enables the proposed smart traffic controller system to realize traffic flow optimization strategies at a single or network junctions

REFERENCES

www.wikipedia.com www.atmel.com www.microcontroller.com www.embeddedprojects.com

QUERIES ?