Project synopsis On LASER SECURITY SYSTEM

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2 Νοε 2013 (πριν από 3 χρόνια και 7 μήνες)

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Project synopsis


On



LASER

SECURITY SYSTEM



Submiited to:



Submitted by:


























OBJECTIVE




Home security using IR



Methodology
-




In this project when LDR will get interrupt then our Controller will display
message and buzzer will sta
rt ringing in timely order.



Introduction

In this project we will use laser for security. A laser


Beam will fall on LDR or Photiode. On other hand detector will
give signal to signal conditioning circuit. We are using 89s52
micorntroller as a brain. 89s5
2 is 8051 series IC. 89s51 have 8k
byte ROM , 256 byte RAM.
We will give output of sensor circuit
to microcontroller ciruit. Microcontroller will give signal to buzzer
and relay drive circuit. Relay drive circuit will switch on / off
lights.

It is very
necessary to protect home using these technologies.


We used laser because it covers large area. Defaul laser will fall on
detector. If laser beam will not fall on security system













SENSOR UNIT.


In this sensor unit it is our choice , how many
sensor’s we use , IN this
project we use two sensor’s, In this project we use two electronics circuit
with infra red sensor’s and fire alarm sensor.


In the infra red sensor. We use ic 555 as a main component. Pin no 4 and pin
no 8 is connected to the pos
itive supply. Pin no 1 is connected to the
negative voltage. One capacitor is grounded from the pin no 5 for noise
cancellation. Output is available on the pin no 3. Sensor is connected to the
pin no 2.


In the case of infra red sensor. Pin no 2 is negati
ve bias through the 33k ohm
resistor and pin no is positively biased through the photodiode. One infra red
transmitter l.e.d is focused to the photodiode . Infra red l.e.d is directly
connected to the positive and negative supply through the 470 ohm resis
tor..


In normal stage when light is focus on the photodiode then pin no 2 is
positively biased photodiode. If pin no 2 is positive then negative output is
available on the pin no 3. Now when any body interrupt the light then there
is no light on the p
hotodiode and pin no 2 is now gets its voltage from only
33 k ohm resistor. If pin no 2 is become negative then output is shifted to
the pin no 3. when positive output is available on the pin no 3 and with the
help of this voltage NPN transistor is on
and npn transistor provide a
negative voltage as a pulse to the microcontroller.


If we connect two sensor as a input to the microcontroller then we use same
circuit with the ic 555 .


Note that microcontroller sense only negative input to the microcontro
ller.












MICROCONTROLLER CONTROL.



ATMEL AT89C2051 Pinout and
Description



The 2051 is a low voltage (2.7V
-

6V), high performance CMOS 8
-
bit microcontroller with 2 Kb
ytes of Flash programmable and
erasable read only memory (PEROM). This device is compatible
with the industry standard 8051 instruction set and pinout. The 2051
is a powerful microcomputer which provides a highly flexible and
cost effective solution to man
y embedded control applications. The
2051 provides the following features:

~ 2 Kbytes of Flash

~ 128 bytes of RAM

~ 15 I/O lines

~ two16
-
bit timer/counters

~ five vector, two
-
level interrupt architecture

~ full duplex serial port

~ precision analog
comparator

~ on chip oscillator and clock circuitry

In addition, the 2051 is designed with static logic for operation down
to zero frequency and supports two software selectable power saving
modes. The Idle Mode stops the CPU while allowing the RAM,
time
r/counters, serial port and interrupt system to continue
functioning. The Power Down Mode saves the RAM contents but
freezes the oscillator disabling all other chip functions until the next
hardware reset.

To learn how to use the 2051 microcontroller, get the
Microcontroller Beginner Kit (click here)


2051
-

24MHz DIP Available


The 2051 can be programmed using a device programmer
such as the
PG302 (Cl
ick Here).


We also have Projects that use the 2051 Microcontroller.


See the
Intermediate Tutorial Section
.


This page last updated on April 7, 2003.




All the input sensor is connected to the pin
no 18 and 19. Pin no 18 is
connected to the P1.6, and pin no 19 is connected to the P1.7. pin no 20 is
connected to the positive supply. Pin no 1 reset pin. One capacitor is
connected from positive to pin no 1 and one resistor is grounded from pin
no 1.
One microswitch is connected across the capacitor fro manual reset
switch.


One buzzer is connected to the pin no 16 ( Port p1.4) this buzzer is on when
circuit sense a input from the input sensor’s. .






















Components required:

IC4433

Ic 91214

89s52 microcontroller

push to on sw

555 timer


.001 µf,0.1 µf,0.01µf

1µf,

220k,470k,4.7k,10k,

crystal 11.0592 MHz

3.38 MHz.

buzzer,

condenser Mic

speaker 8 ohm

relay 12v 100 ohm

transformaer 6v 500mA

infrared Sensor,

heat Sensors

connecting wires

copper clad board





5v Supply
circuit











B
LOCK DIAGRAM
SECURITY
SYSTEM



Advantages
:



Easy to implement



Reliable,



Low cost,

MCU

89c2051

Timer circuit

sensors

Buzzer
indication



Components easily available in

market.


References
:

www.atmel.com

www.yahoosearch.com

www.ips123.in

www.ipb
.in