This project consists of a microcontroller, GPS modem, GSM modem, and security switch to identify automobile theft using GPS. The security switch is connected to the microcontroller, and when the vehicle is parked the microcontroller locks the GPS coordinates. If the vehicle is moved, the microcontroller detects this and sends SMS alerts to the owner with the new coordinates. The system includes hardware components like an AT89S52 microcontroller, GPS and GSM modems, and software like Keil Microvision to interface between the components.

1. Head office Buildings, OP: 3nd floor, Krishna Reddy P: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
AUTOMOBILE THEFT IDENTIFICATION USING GPS
ABSTRACT
Global Positioning System (GPS) satellites broadcast signals from space that GPS
receivers, use to provide three-dimensional location (latitude, longitude, and altitude)
plus precise time. GPS receivers provides reliable positioning, navigation, and timing
services to worldwide users on a continuous basis in all weather, day and night, anywhere
on or near the Earth. This ultra-sensitive GPS receiver can acquire GPS signals from 65
channels of satellites and output position data with high accuracy in extremely
challenging environments and under poor signal conditions due to its active antenna and
high sensitivity. The GPS receiver’s -160dBm tracking sensitivity allows continuous
position coverage in nearly all application environments. The output is serial data of
9600 baud rate which is standard NMEA 0183 v3.0 protocol offering industry standard
data messages and a command set for easy interface to mapping software and embedded
devices.
This project consists of microcontroller, GPS modem, GSM and Security switch.
Security switch connected to microcontroller with positive logic. This project fixed inside
the vehicle. Press security switch after parking the vehicle. Then microcontroller locks
the coordinates (latitude, longitude and altitude) of that particular place. If anybody move
the vehicle from that place microcontroller can detect and sends SMS to the user or
vehicle owner. After moving vehicle from fixed coordinates microcontroller sends
coordinates to user continuously. With the help of this project we can easily find out the
vehicle position through coordinates.

2. Head office Buildings, OP: 3nd floor, Krishna Reddy P: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
In this project 7805 is a regulator and it avoids noise spikes in power supply. GPS
modem is connected microcontroller through serial port. These GPS modem works under
9600or 4800 baud rates.
TECHNICAL SPECIFICATIONS:
HARDWARE:
Micro controller : AT89S52
Crystal : 11.0592 MHz
LED : 5mm Red LED
Serial Driver : Max 232
GPS modem
GSM modem
Switch
Power supply
Transformer : 12V step down
Filter : 1000uf/25V
Voltage Regulator : 7805
SOFTWARE:
Keil micro vision
Proteus
UC flash
C# .net Application
APPLICATIONS:

3. Head office Buildings, OP: 3nd floor, Krishna Reddy P: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
 Security Systems
 Vehicle security
 Automobiles
BLOCK DIAGRAM:
8
0
5
1
Power
Supply
Security
Switch
GSM
Modem
Max-232

4. Head office Buildings, OP: 3nd floor, Krishna Reddy P: ICICI ATM, Ramalingapuram,
Nellore www.pvrtechnology.com, E-Mail: pvrieeeprojects@gmail.com, Ph: 81432
71457
POWER SUPPLY BLOCK DIAGRAM:
GPS
Modem
Step down
Transformer
Filter Regulator OutputBridge
Rectifier