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{LIBRARY MANAGEMENT SYSTEM}

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RFID-What it is?

Radio-frequency identification (RFID) is an automatic

identification method, relying on storing and remotely

retrieving data using devices called RFID tags or

transponders. RFID (radio frequency identification) is a technology that

incorporates the use of electromagnetic or electrostatic

coupling in the radio frequency (RF) portion of the

electromagnetic spectrum to uniquely identify an object,

animal, or person.

An alternative to bar code.

RFID is also called dedicated sho rt range communicat ion

(DSRC).

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Components of RFID(contd)

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Passive RFID Tags

Tag contains an an

tenna, and a small chip

that stores a small amount of data

Tag can be programmed at manufacture

or on installation

Tag is powered by the high powerelectromagnetic field generated by theantennasusually in doorways

The field allows the chip/antenna to reflectback an extremely weak signal containing thedata.

Collision Detection recognition of multipletags in the read range is employed toseparately read the individual tags

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Active RFID Tags

Have much greater range100m

Hold much more informationKbytes

Can integrate sensing technology Temperature, GPS

Can signal at defined time

Multiple tags can be recorded at once

Shipping containers

Babies

Electronic assets

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RFID Vs Bar CodeRFID Barcode

Forging is difficult Forging is easy

Scanner not required. No need to

bring the tag near the reader

Scanner needs to see the bar code

to read it

RFID is comparatively fast

Can read multiple tags Can read only one tag at a time

Relatively expensive as comparedto Bar Codes

(Reader 1000$, Tag 20 cents a

piece)

Can be reusable within factory

premises

Cannot be reused

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LIBRARY MANAGEMENT

SYSTEM USING RFID

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CIRCUIT DIAGRAM

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PCB LAYOUT

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MUTISIM WORK

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RFID MODULE CIRCUIT

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RS232

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MAX232

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INTERFACING OF MAX232

AND RS232J2

1

23

4

5

67

8

9

P3.0

5V

C4

0.1uf

C7

0.1uf

TXD

C6

0.1uf

P3.1

T1OUT

C1

1uf

T1OUT

U3

MAX323215

16

13

8

10

11

1

3

4

5

2

6

12

9

14

7

GND

VC

C

R1INR2IN

T2IN

T1IN

C1+

C1-

C2+

C2-

V+

V-

R1OUTR2OUT

T1OUT

T2OUT

C5

0.1uf

RXD