Low Cost Vechile Security Abstract

ENTRY DOCUMENT A3757 Low Cost Vehicle Security System

June 2004

A3757 Entry Document

A3757: Low Cost Vehicle Security System

1. Introduction Vehicle theft is a big nuisance for vehicle owners. It usually happens that in a congested market where no authorized parking arrangements are available, if you park your vehicle then the chance of getting your vehicle at the same place after shopping, is a big question. Even in residential colonies incidences of vehicle theft are quite common. Commercially available vehicle security systems are very costly especially for two-wheeler owners. This is the place from where motivation comes to develop a low cost affordable vehicle security system (VSS) with same robustness as of costlier ones. In this project efforts are made to develop a low cost vehicle security solution using Atmel’s Atmega8 microcontroller with Analog Device’s low cost acceleration sensor ADXL311JE and Dallas semiconductor’s DS1973 iButton.

ADXL 311

A T M E G A 8

Battery

DS1973 IButton

Siren with driver circuit Figure 1: Block diagram of VSS

+5V

+5V PC5

RESET PD0

PC4

PD1

PC3

PD2

PC2

PD3

PC1

PD4

PC0

VCC

GND

200 k

+5V

0.1

GND PB6 +5V

ATMEGA 8-16PI

0.1

ADXL311

AVREF

+9V

AVCC

PB7

PB5

PD5

PB4

PD6

PB3

PD7

PB2

PB0

PB1

Siren

2

4.7 k 10 k

A3757 Entry Document

Figure 2: Circuit diagram of VSS

iButton Holder

Mechanical Key Slot

Figure 3: VSS mounted in two-wheeler

3

A3757 Entry Document

Atmega8 IButton in Key ring Acceleration Sensor Module SIREN

Figure 4: VSS on Circuit board

4