Digital Logic Design based project presentation.

1. 4-Way Traffic Signal
Group No:02
Section: L
PRESENTED BY
1. HAMID,MD.AKTER ID:15-28491-1
2. RICHARD ABDULLAH AL ROMAN ID:15-28973-1
3. SADMAN MD FARHAD ID:15-28907-1
4. MAHMOOD MD. SAKIB ID: 14-27622-3
5. AHMED FOYSAL ID-15-28927-1

2. Topics of Presentation
 Project Goal
 History of traffic signal
 Features of traffic signal
 Components
 Circuit Diagram
 Simulation Results
 How to project works?
 Scoup
 References

3. Project Goal:
The function of traffic lights is to
provide control and coordination to
ensure that traffic moves smoothly
and safely as possible.
A variety of different control systems
are used to accomplish this, ranging
from simple clock work mechanisms
to computerized control and
coordination systems that self-adjust
to minimize delay to people using the
road.

4. History of traffic light
 The world's very first traffic lights
were invented by J P Knight installed
near London's House of Commons,
which was on the intersection of
George and Bridge Street, in 1868.
 In 1914 The American Traffic Signal
Company installed red and green
traffic lights on every corner of the
intersection of 105th Street and
Euclid Avenue in Cleveland, Ohio.
 First traffic lights were all controlled
by either timing, or manually
switched

5. Features of traffic light
 This project uses a LED light as an
indicator.
 The LEDs are automatically on and
off by making the corresponding
port pin high.
 controller assumes equal traffic
density on all the roads.
 The free left turn condition is
provided throughout the entire
signal period.
 The control can also be exercised
manual when desired.

6. Components:
 IC: Timer IC -555
 10 Bit Counter 4017
 LED: Green-4,red-5,Yellow-4
 Resistors:4.65k-1, 350 ohm-2,10k-1
 Variable resistors-100k-1
 Diode:1N4007-10
 Capacitor:100uF-1,10uF-1
 Battery:9V
 Breadboard-1
 Connecting wire

7. Circuit Diagram:

8. Simulation:
1st step:

9. 2nd step:

10. 3rd step:

11. 4th step:

12. How to project works??

13. SCOPE
 The project finds high practical and widespread use
 This project can be enhanced in such a way as to
control automatically the signals depending on the
traffic density on the roads using sensors like IR
detector/receiver module extended with automatic
turn off when no vehicles are running on any side of
the road which helps in power consumption saving.

14. References
 [1]https://www.youtube.com/watch?v=RJMQHEWQi3I
 [2] http://www.slideshare.net/Rkmishra00/a-minor-
project-on