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INTRODUCTION OF PROJECT

This Project takes over the task of Ringing of the Bell in Colleges. It replaces

the Manual Switching of the Bell in the College. It has an Real Time Clock

(S!"#$% which tracks over the Real Time. &hen this time e'uals to the Bell

Ringing time then the Rela) for the Bell is switche* on. Time Clock is

*ispla)e* on +C *ispla). The Microcontroller ,T-c/! is use* to control all

the 0unctions. &hen the Real time an* Bell time get e'ual then the Bell is

switche* on for a pre*etermine* time.

This project can 1e use* in the e2am mo*e where user can set the e2am starttime an* e2am en* time. The *ispla) will show the e2am starte* an* when

e2am time over it will show the e2am en* an* 1u33er will ring for in*ication.

The implementation of this automatic college 1ell woul* 1e a*vantageous

since it keeps manual work awa) i.e. there is no re'uirement of an) la1our it

runs automaticall).

BLOCK DIAGRAM:

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MICROCONTROLLER 89c51:

The ,T-C/! is a low4power high4performance CM5S -41it microcomputer

with 6 71)tes of 0lash Programma1le an* 8rasa1le Rea* 5nl) Memor)

(P8R5M%. The *evice is manufacture* using ,tmel9s high *ensit) non4volatile

memor) technolog) an* is compati1le with the in*ustr) stan*ar* MCS4/!

instruction set an* pin out.

The on4chip 0lash allows the program memor) to 1e reprogramme* in4s)stem

or 1) a conventional nonvolatile memor) programmer. B) com1ining a

Micro

Controlle

r

Real Time

Clock

Buzzer Driver

LCD Display

Buzzer

Power Supply

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versatile -41it CP: with 0lash on a monolithic chip the ,tmel ,T-C/! is a

powerful microcomputer which provi*es a highl) fle2i1le an* cost effective

solution to man) applications.

DS1307:

The S!"#$ serial real4time clock (RTC% is a low4power full 1inar)4co*e*

*ecimal (BC% clock;calen*ar plus /< 1)tes of => SR,M. The

clock;calen*ar provi*es secon*s minutes hours *a) *ate month an* )ear

information. The en* of the month *ate is automaticall) a*juste* for months

with fewer than "! *a)s inclu*ing corrections for leap )ear. The clock

operates in either the ?64hour or !?4hour format with ,M;PM in*icator. The

S!"#$ has a 1uilt4in power4sense circuit that *etects power failures an*

automaticall) switches to the 1ackup suppl). Timekeeping operation continues

while the part operates from the 1ackup suppl)

LCD Dis!"#:

It wiil *ispla) the time *ate as well as current room temperature. 5utput of

microcontroller is applie* to the +C *ispla).

B$%%&' ( B$%%&' )'i*&':

5utput of microcontroller is applie* to 1u33er *river which *rives 1u33er after

lecture.

A!ic"+i,-s :

This s)stem can 1e use* in colleges for regular lecture 1ell.

It can 1e also use* in institutes coaching classes etc

This project can 1e use* in companies after some mo*ifications

A)*"-+".&s@

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There is no re'uirement of an) la1our it runs automaticall) A *ecreases

*epen*a1ilit) on human.

The chances of errors are less compare* to manual s)stem.

F$+$'& Sc,&:

&ireless technolog) can 1e use* for further a*vancements

Time ta1le can 1e *ispla)e* after some mo*ifications

REFERENCE BOOKS:/

The -#/! microcontroller @4 7enneth ,)ala

The -#/! microcontroller an* 8m1e**e* s)stems @4 Muhamma* ,li

Ma3i*i

EB/SITES:/

www.all*atasheets.com

www.*atasheetarchieve.com

www.atmel.com

http://www.alldatasheets.com/http://www.datasheetarchieve.com/http://www.atmel.com/http://www.alldatasheets.com/http://www.datasheetarchieve.com/http://www.atmel.com/