INTERACTING

COLLEGE

MOBILE SYSTEM

OBJECTIVE

To develop a interacting college

mobile system.

Make new students easy to identify

their class room.

Any person entering the college

without having any knowledge

regarding branches, office room find

this project as the medium of

interaction.

INTRODUCTION

Interaction is based on GSM signals

of a mobile phone.

DTMF signaling technique is utilised.

A large LCD display is used for the

system.

DTMF SIGNALS

• Popular signaling method between

telephones and switching centers

• Also used for signaling between the

Telephone network and computer

networks

• Transmitted over a telephone line

• Uses speech frequency signals

• Superposition of 2 sine waves with

different frequencies

THE DTMF KEYPAD

1209 Hz 1336 Hz 1477 Hz

697 Hz 1 2 3

770 Hz 4 5 6

852 Hz 7 8 9

941 Hz * 0 #

DTMF GENERATION

Pin Diagram of AT89S52 Micro Controller

MT8870 is used as DTMF decoder.

LED’S are used for signaling

purpose.

programming to the

microcontroller is done in

Embedded C language.

Keil C software used for

interfacing the microcontroller.

WORKING MODEL RESULTS

Main

Displ

ay

JUST DIAL 9030000123 to

INTERACT

When

the

option

auditori

um is

selecte

d

When the option LIBRARY is selected.

Future Scope

Transport systems like railways.

Multi-specialty hospitals.

Multiplex theaters.

CONCLUSION

A well interacting college mobile system have been developed.

Reception counters at college campus can be reduced.

One or more people can also interact at the same time.