MICROCONTROLLER BASED INTERACTIVE VOICE RESPONSE

SYSTEMAccomplished by :

Swapnil Madali ( Roll Swapnil Madali ( Roll No 18 )No 18 )Harsh Mehta ( Roll Harsh Mehta ( Roll No 24 )No 24 )Pranoy Balakrishnan ( Roll Pranoy Balakrishnan ( Roll No 61 )No 61 )Abhishek Nadkarni ( Roll Abhishek Nadkarni ( Roll No 68 )No 68 )

fromfrom : BE ET-2 : BE ET-2

What isWhat is IVRS IVRS ??

• Bridge between People and Computer Bridge between People and Computer databasesdatabases

• No Human Interface No Human Interface • Information can be accessed from Information can be accessed from

anywhereanywhere• Information can be accessed at Information can be accessed at

anytimeanytime

OUROUR AIMSAIMS FOR THE PROJECTFOR THE PROJECT

• Practically apply what we have learned Practically apply what we have learned in theoryin theory

• Involve both - Hardware & SoftwareInvolve both - Hardware & Software• Highly Economical and EfficientHighly Economical and Efficient• Extensibility & flexibilityExtensibility & flexibility• Devoid of Human InterfaceDevoid of Human Interface• User FriendlyUser Friendly• Provide a hands on ExperienceProvide a hands on Experience

Isolation Transformer

RS232 Cables

Computer

MAX232 Chip

Micro Controll

er 89S52

Ring Detector

DTMF Decoder 8870

Relay Control

Relay control for Audio

Relay Activation Circuit

Voice chip

Telephone

PROJECT

Assembly Language

Programming

Application Circuit

Primary Circuit

SOFTWAREHARDWARE

Visual Basic 6.0

PHASES OF PROJECT

Inputfromline

Telephone

1 k

21

100 k

21

10 k

21

56 k

2

1

IN91

4

6N139

20 n1 2

22 M

2

1

100

n

1

2

100 k21 5 V

2N2095

P2.5

GND

100n

1 2

9

3

P2.1

X1

P2.2

5

RST

10 k

2

1

P1.2

19

X2

P2.6

14

47 pf

1

2

P1.3

28

2

P1.0

5 V

P2.0

18

10uf / 10 V

1

2

20

4

P3.4

8 9 S 5 2

1

12

27

31

26

P1.4

5 V

P3.2

VCC

40

47 pf

1

2

P2.7

P2.3

P1.1

390

E

2

1

-T

100

k

2

1

1M

2

1

7400

1

AST

122

3

3 5 V

4

47 p

/16V

9

D1N4148 5 V

BC 516

-T

5

1 M

2

1

RET

6

Q

2

RST

5 VRx

4047IC

10

2.7 k

2

18

4.7

M

2

1

1

AST 100

n

1

2

RCC Cx

1:1 600 ohmD

1N41

48

100 n

1 2

12 V

BC 547

BC 547

820 E21

8.2

k

2

1

5.6 V / 250 mW

5.6 V / 250 mW

8.2

k

2

1

5 V

1 k

21

Q4

10

4

6

8

IN+

OSC1

1

5

Q1

5 V

OEEST

IC

56 k

2

1

7

ET/GT

3

100 n1 2

Q3

270

k

2

1

IC 8870

13

17

IC

Q2

STD

OSC2

16

2 15

14

100

k

2

1IN-

12

10 k21

11

39 k

2

1

10 k21

10 n

1 2

10 n1 2

100 k

21

100 k21

CHIP

OUTPUTGIVENON

TELEPHONE LINE

VOICE

Primary Circuit of Project

RING DETECTION CIRCUIT SHOWING PRESENCE OF RING

PRIMARY CIRCUIT IN ITS ACTUAL FORM

Application Circuit involving Voice Chip

RECORDING OF MESSAGE - FLEXIBILITY

PLAYING OF MESSAGE

StartInitialization

Wait for user response

Call delay of 10 sec

Message played accordingly

Relay 2 & 1 disconnected

Stop

Yes

No

No

Yes

P2.5 high ?

Count the no. of high & low pulses

Relay 1 & 2 is connected and welcoming message is played

SYSTEM SOFTWARE FLOWGRAPH

P2.5 high ?

ENTIRE CIRCUIT OF IVRS

FUTURE DEVELOPEMENT

• Can Enhance its Real Time Operation because of the Application PCB Flexibility

• Can be Interfaced with Computer for Serial Communication ( using VB 6.0 )

• PC can be source to an Ocean of messages using multistage Response

AIMSAIMS ACHIEVEDACHIEVED ??• Practically applied what we have learned in theory -Practically applied what we have learned in theory - YESYES• Involve both - Hardware & Software -Involve both - Hardware & Software - YESYES• Highly Economical and Efficient -Highly Economical and Efficient - YESYES ( Cost Rs. 2583 )( Cost Rs. 2583 )• Extensibility & flexibility -Extensibility & flexibility - YESYES ( Microphone present ) ( Microphone present )• Devoid of Human Interface -Devoid of Human Interface - YESYES• User Friendly -User Friendly - YESYES• Provide a hands on Experience -Provide a hands on Experience - YESYES

CONCLUSIONSCONCLUSIONS• Excellent & Efficient way to satisfy small concern

• Very simple, as explained in modular format

• Gives clear understanding of various areas of technology involved in compact & crisp manner

• Errors can be easily detected & only defective component of the unit needs to be replaced

• Especially important to start – ups since the cost involved is less

• Wide application in schools & colleges example :- results of examinations can be stored and the candidates can

access it via their telephone rather than come all the way to their institution !

ACKNOWLEDGEMENTSACKNOWLEDGEMENTS

Prof. Archana Gawad ( Internal Prof. Archana Gawad ( Internal Guide )Guide )

Dr. A.M. Salsingikar ( HOD, EXTC )Dr. A.M. Salsingikar ( HOD, EXTC )

Prof. A. Deshpande ( Principal, Prof. A. Deshpande ( Principal, ACE )ACE )