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RFID BASED DOOR ACCESS CONTROL

 

 

Introduction and working

In this project we will use RFID to recognize person. We ill get data on receiver side and will decode. Decoded data will be given to microcontroller. Microcontroller will control isolator circuit to drive h bridge . H- bridge circuit work as a current amplifier. In  this project we will transmit password wirelessly from remote. At rxer end we will decode that code, according to it decoded code will be transmitted via RF. In rxer section code is decoded and will display on LCD.  if password match with autorised database then it will open the gate. If the password does not match then it does not allow.

Pin no 20 is connected to the positive supply. In this project we provide a 5 volt dc power supply. This power supply is truly regulated power supply. Pin no 10 is connected to the negative supply. Here we supply a negative voltage on this pin. Crystal is connected to the pin no 4 and 5 of the microcontroller. Crystal provide a clock signal to run the vehicle and process all the internal requirement of the  circuit. We use two sensor and these two sensor are connected to the p3.4 and p3.5 of the microcontroller.For the regulated power supply we use ic 7805 as a regulator to provide a fix 5 volt power supply.

When we move the robot on surface then infra red light is not reflected from the surface. When infra red light is not reflected from the surface then infra red sensor is not getting a signal. We program the robot like this  when sense the light  then it means  position of sensor is on the surface. If the sensor is on white line then one motor change its direction and due to that robot change its path and when both the sensor on surface then only vehicle move forward. We use two sensor for two motor’s. if the both the sensor on surface then vehicle move forward , if one sensor is noton surface then vehicle change its direction. Microcontroller provide a signal to the motor circuit. Motor is not directly connected with the microcontroller. For the safety of the main processor we interface the motor with optocoupler circuit. Here we use pc 817 ( 4 pin opto coupler) to interface the micro controller with  the motor circuit. We use H bridge circuit with the motor. H bridge basically control the movement of the motor. With the help of this H bridge we change the direction of the motor. We use four transistor circuit with each motor. We are using four transistor circuit. Out of these four transistor  two transistor is NPN and two transistor and PNP transistor.  One NPN and One PNP provide a one direction voltage and motor moves on one direction. Second NPN and second PNP transistor again change the direction of the motor automatically.

 

In this project we will make a transmitter for RF data transmission. Pin no 1of RF tx module is ground . second is for data , third for VCC and fourth for antenna Transmitter

 

 

 

ADVANTAGES

 

Low cost

 

Reliable

 

Portable

 

Flexible  due to microcntroller

 

Easy to use- system is very easy to understand

 

Against currption- System is against corrupt police. It will help to reduce corruption in police. Because challan’s will be in electronics records.

 

Protection- it will also help in protecting from bank and home robbery’s.

 

Features-

 

·        Wireless system- In this project we are using we are wirelessly open gate using RF based password

 

·        LCD display- we will interface 16*2 LCD to show charactered enetered

 

·        RF technology- 433Mhz RFID will be using having 12 bit data transfer.

 

.

 

Hardware required-

 

8051 programmer universal kit

 

CRO 20 Mhz

 

Digital multimeter

 

Software required:

 

Keil software- Microvision 2- keil will be used as a compiler software

 

ORCAD for PCB design 10.5 – we will design Layour and schematic using ORCAD software. Evaluation version can be downloaded from internet.

Proteus for simulation 7.4 version- this software is to simulate hardware

 

Work division:

 

Circuit and theory- Abinav Pathak- 15 sept 2010

 

Component collection- Gaurav- 30 sept 2010

 

Programming- Himanshu -15 Oct 2010

 

PCB designing- Abinav- 30 Oct 2010

 

Final Testing and rework- Abinav ,Himanshu,Gaurav- 10 Nov2010

 

 

 

 

 

 

 

 

 

 

Component List

 

 

 

 

 

S.No.

Item

Quantity

Rate/Unit

 Rate(Rs.)

 

 

1

MCU 89C051

0

80

0

 

 

2

Push to On Sw

3

12

36

 

 

3

SOLDERING WIRE

1

25

25

 

 

4

SOLDERING IRON

1

120

120

 

 

5

FLUX

1

10

10

 

 

6

CONNECTING WIRE

1

50

50

 

 

7

TR548

2

2

4

 

 

8

HT12E

1

120

120

 

 

9

HT12D

1

120

120

 

 

10

RFID Txer

1

200

200

 

 

11

RFIDRXER

1

300

300

 

 

12

TR558

0

2

0

 

 

13

RESISTENCES

20

0.5

10

 

 

14

CAPACITORS

 

 

0

 

 

15

1000µf

2

10

20

 

 

 

 

 

 

 

 

 

17

470µf

4

5

20

 

 

18

DIODES

8

1

8

 

 

19

LED

8

1

8

 

 

20

Crystal 12MHz

2

25

50

 

 

21

IC BASE

3

5

15

 

 

 

 

 

 

 

 

 

23

IC 7805 Volt. Reg

2

15

30

 

 

24

TRANSFORMER 9 V

1

30

30

 

 

25

SOCKETS

3

10

30

 

 

26

RELAY 9V

3

25

75

 

 

27

MILER CAP

5

3

15

 

 

28

CRYSTAL 3.579545

2

20

40

 

 

29

IC136

2

15

30

 

 

30

HOLDER

2

10

20

 

 

31

PLY BOARD

1

100

100

 

 

32

TAPE ROLL

1

10

10

 

 

33

Copper Clad Board

1

100

100

 

 

34

FeCl3

1

100

100

 

 

35

ZENER

0

3

0

 

 

36

Screws/bolt

2

2

4

 

 

37

Betteies

1

15

15

 

 

 

TOTAL COST

 

 

1596

 

 

 

 

Bibliography:

www.ludhianaprojects.com

http://www.multyremotes.com/remote-robo-vehicle.htm

www.rickysworld.com/rfid.html

www.atmel.com

www.keil.com

8051 microcontroller book ALI MAZIDI