Traffic Control System using 89c51 and assembly language

8/9/2019 Traffic Control System using 89c51 and assembly language

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Trafc ControlSystem

using 89C51

Project Title:

Thajid Ibna Rouf Uday

Id:021 121 102Marzia IslamMowID:024121009

Amzad ossainID:021 111 140


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D!s"ri#$ionThis project is developed to meet the

re"uirements of solid state traffic light controller

by adopting microcontroller as the main

controlling element, and led#s as the indication of

light. A micro controller is interfaced to led#s

provide for centrali$ed control of the traffic

signals. %icrocontroller is programmed in such a

way to adjust their timing and phasing to meet

changing traffic conditions. The circuit besides

being reliable and compact is also cost effective


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D!s"ri#$ion

Typically traffic lights consist of a set of three colored

lights& red, yellow and green. 'n a typical cycle,

lashing )reen& *aries among jurisdiction.'llumination of the green light allows traffic to

proceed in the direction denoted.


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D!s"ri#$ionFlashing Yellow: +aution, crossing or road

ha$ard ahead. 'llumination of the amberyellow

light denoting, if safe to do so, prepare to stop

short of the intersection, andFlashing Red: Treat as a stop sign. 'llumination

of the red signal prohibits any traffic from

proceeding.

After completing every cycle red and yellow

lights are flashing at a time for proceed net cycle

to flash green light


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D!s"ri#$ion

A%/T'01&Traffic signal is controlled by light are generally

built in 2 types for four roads junction point.

T3/4 5& one major road and one minor roadare crossed at a point.

T3/42& Two major roads are crossed at a point.

These two type of traffic system are different

for heavy rush of vehicles. 0ur traffic control

system is built in T3/42 , which is shown net

slide


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D!s"ri#$ion


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D!s"ri#$ionWorking procedure&When the display5 of road 5 flash green light to move

then other three roads are show stop sign.

After ome sec yellow light (halt signal! is flashes for

ome sec. At the same moment display5 of road2shows red and yellow signals at a time, which means

that after some sec it will flash green light.

This se"uence is repeated continuously for accordinglyroad 5, 2, 6 7 8.

When all roads are shows red signal for ome sec,

then general people are crossing road very safely which

shows in 9isplay


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D!s"ri#$ion%ost of the time general people are not use

foot over bridge to cross the road, and many

busy roads have no foot over bridge to cross

road. o, 'f there is a traffic control display toshow when general people are cross the road

which is play very important role to minimi$e

largely the road accident. At the mean time therewas a bar which is closed all the road and does

not move on the vehicles. :ecause some time

driver are not flow the traffic signals .


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AT89C51%icrocontroller +hip, 5pic

Crystal52%;pic

L!"#Yellow, 8pic

L29%" %otor 9river (package! , 8pic

Stepper Motor, 8pic

%&M'&()(T*


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%&M'&()(T* AT89C51AT>?+@5 is an >-

bit microcontroller and

belongs to Atmels >=@5

family.

AT%4B >?+@5 has 8C: of

lash programmable and

erasable read only memory

(/4D0%! and 52> bytes of

DA%.

't can be erased and program

to a maimum of 5=== times.


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%&M'&()(T* 74LS245Th!s! o"$al bus $rans"!i+!rs ar!

d!si,n!d for asyn"hronous $wo-way "ommuni"a$ion b!$w!!nda$a bus!s.

Th! "on$rol-fun"$ionim#l!m!n$a$ion minimiz!s!/$!rnal $imin, r!uir!m!n$s.

Th! d!+i"!s allow da$a

$ransmission from $h! A bus $o$h! bus or from $h! bus $o$h! A bus d!#!ndin, on $h!lo,i" l!+!l a$ $h! dir!"$ion-

"on$rol 3DIR in#u$. Th! ou$#u$-!nabl!3&) in#u$ "an disabl! $h!


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%&M'&()(T* 744

This #a"6a,! "on$ains si/

in+!r$!rAll si/ in+!r$!rs "an b! us!dind!#!nd!n$ly of on! ano$h!r .


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C&'(&)!)TS

Desistance- 66= ohms


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%&M'&()(T*7)D


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C&'(&)!)TS L29%" %otor 9river

*ide S+,,ly#-oltage Range:

4.5 - to %/ -

Se,arate 0n,+t#Logi S+,,ly

igh#)oise#033+nity 0n,+ts&+t,+t C+rrent 1 A (er

Channel

(ea &+t,+t C+rrent 2 A (er

Channel

Can "rie 2 3otors 6sero or d

3otor at a ti3e

Can "rie one ste,,er 3otor


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Stepper motorA stepper motoris a brushl!ss D%

!l!"$ri" motor$ha$ di+id!s a full ro$a$ion in$o anumb!r of !ual s$!#s. Th! motor's#osi$ion"an $h!n b! "ommand!d $o mo+! and hold a$on! of $h!s! s$!#s wi$hou$ any f!!dba"6s!nsor as lon, as $h! motoris "ar!fully siz!d$o $h! a##li"a$ion.


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%ir"ui$ *"h!ma$i"


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'ro,ram

0D) =; %0* D5,E22; Fload D5,22;

%0* D2,E28; Fload D2,28;

%0* D6,E58; Fload D6,58;

%0* D8,E=+; Fload D8,=+;

%0* DG,E25; Fload DG,25;

0D) ==6=


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'ro,ramTADT& %0* p2,D2 Fent port2 from D2

A+ABB 94BA32 %0* p5,DG Fent port5 from DG

A+ABB +01T9

%0* p2,D2 Fent port2 from D2

%0* p5,DG Fent port5 from DG

A+ABB +01T9

%0* p2,E2G; Fent port2 from 2G;


A+ABB 94BA32



A+ABB +01T9



A+ABB +01T9

%0* p2,D5 Fent port2 from D5 %0* p5,E68; Fent port5 from 68;


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'ro,ramA+ABB 94BA32

%0* p2,D2 Fent port2 from D2 %0* p5,D8 Fent port5 from D8

A+ABB +01T9



A+ABB +01T9

%0* p2,E68; Fent port2 from 68;


A+ABB 94BA32



A+ABB +01T9


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'ro,ram%0* p2,D8 Fent port2 from D8


A%A77 %&U(TD

M& #2R ;*!n$ #or$2 from R

M& #1


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'ro,ram

+01T9& %0* p=,EGH; F ? A+ABB 94BA32

%0* p=,EH; F >

A+ABB 94BA32

%0* p=,E2H; F H

A+ABB 94BA32

%0* p=,EH9; F G

A+ABB 94BA32 %0* p=,EG9; F @

A+ABB 94BA32

%0* p=,EGG; F 8

A+ABB 94BA32 %0* p=,E8; F 6

A+ABB 94BA32

%0* p=,E@:; F 2

A+ABB 94BA32

%0* p=,E=G; F 5

A+ABB 94BA32

%0* p=,E6f; F = A+ABB 94BA32

D4T


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*imula$ion


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Documents

Traffic Control System using 89c51 and assembly language