Vehicle tracking system using GSM and GPS

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Vehicle tracking and locking system

Real time Vehicle tracking systemUsing GPS and GSM

230 to 12 VStep Down TransformerAT89S52cMAX232GSM ModemGPS Modem16x2 LCD DisplayRelay

Block Diagram:

Power Supply

Transformer(12-0-12)V :i) Step down ii) 0-9V with 500mA

Rectifier:=> Bridge Rectifier => Bidirectional to unidirectional

Voltage Regulator: 7805 for 5V constant DC

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

AT89S52 Microcontroller:


Features:Compatibility with the MCS 51 family8-bit CPU frequency up to 33MHz;RAM: 256 BytesFlash memory: 8K Bytes3 timers / counters of 16 bits;Two data pointers1 serial port (full duplex UART)supports up to 10 000 rewritescontains the oscillator;Short programming time.



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 dayFor a 2D location, 3 GPS Satellites are usedFor 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 dataTHE SIGNAL


Receivers require clear line-of-sight; thus, they will not work indoors or where tall objects obscure the sky


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