Vehicle tracking and locking system
Real time Vehicle tracking systemUsing GPS and GSM
230 to 12 VStep Down TransformerAT89S52cMAX232GSM ModemGPS Modem16x2 LCD DisplayRelay
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
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.
GPS and GSM
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
(3).Almanac dataTHE SIGNAL
BASIC CONCEPTS OF GPS
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)
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.