Traffic signals controllerer based on microcontroller

1. BY
R.SURESH (16705A0426)
B TECH II Year I Sem
ELECTRONICS & COMMUNICATION ENGINEERING
ANNAMACHARYA INSTITUTE OF TECHNOLOGYAND 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

2. CONTENTS
 INTRODUCTION
 HISTORY
 FLOW CHART
 MICRO CONTROLLER
PIN DIAGRAM
 CIRCUIT DIAGRAM
 HARD WARE DESCRIPTION
 ADVANTAGES
 CONCLUSION
REFERENCES

3. 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.

4. 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.

5. 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

6. 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.

7. AT89S52 PIN DIAGRAM

8. 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

9. CIRCUIT DIAGRAM

10. HARD WARE DESCRIPTION
STEP DOWN
TRANSFORMER
FILTER
REGULATOR
RECTIFIER
230v AC
5v DC

11. ADVANTAGES
1. 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.

12. 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

13. REFERENCES
 www.wikipedia.com
 www.atmel.com
 www.microcontroller.com
 www.embeddedprojects.com

15. QUERIES ?