REAL TIME VEHICLE TRACKING SYSTEMUsing GPS and GSM

230 to 12 VStep Down Transformer

AT89S52µc

MAX232

GSM Modem GPS Modem

16x2 LCD Display

Relay

Block Diagram:

Power Supply

Transformer(12-0-12)V :i) Step

down ii) 0-9V

with 500mARectifier:=> Bridge Rectifier

=> Bidirectional to unidirectional

Voltage Regulator: 7805 for 5V constant DC

Filter: => Capacitor of 1000µF and 25/50V

AT89S52 Microcontroller:

AT89S52

Features:o Compatibility with the MCS 51 familyo 8-bit CPU frequency up to 33MHz;o RAM: 256 Byteso Flash memory: 8K Byteso 3 timers / counters of 16 bits;o Two data pointerso 1 serial port (full duplex UART)o supports up to 10 000 rewriteso contains the oscillator;o Short programming time.

GPS and GSM

GPS

Þ To Find location by using Latitude and Longitude data

Why we use GPS ?

Features of GPS: 24 Satellites at different orbitsRevolve around Earth twice a day

For a 2D location, 3 GPS Satellites are used

For a 3D location, more than 3 Satellites are used

How it Works ?

TriangulationAugmentation

A GPS Signal contains three different bits of information(1).Pseudo random code

(2).Ephemeris data

(3).Almanac data

THE SIGNAL

BASIC CONCEPTS OF GPS Receivers require clear line-of-sight; thus, they will not work indoors or

where tall objects obscure the sky

GSM

IC MAX232: • MAX232 IC is used to convert the TTL/CMOS logic levels to RS232 logic levels during serial communication of microcontrollers with PC

• The controller operates at TTL logic level (0-5V)

• whereas the serial communication in PC works on RS232 standards (-25 V to + 25V)

Schematic Diagram

APPLICATIONS: Stolen vehicle recovery . Field service management. It is used for food delivery and car rental companies.

ADVANTAGES: It provides more security than other system. From the remote place we can access the system.

ThankYou