ABSTRACT: The main aim of this embedded application is to detect alcohol in people, this design is an embedded kit which will be placed in a vehicle. Now, the vehicle will be under the control of the kit .If any person that has taken alcohol enter the vehicle it gives a buzzer sound immediately , and now the car will be under the control of the hardware used. The vehicle is run using wireless communication i.e. from Control section (acts as transmitter) the control signals is ejected, then the vehicle receives (acts as receiver) the signals, according to the signals it will give a alarm or buzzer. It aims at designing and executing the vehicle controlling using RF. By using the RF communication, whenever alcohol is detected using the alcohol detector, the micro controller sends the information to the encoder and the encoder encodes the values and is received by the RF Transmitter. RF Receiver receives the information from the RF Transmitter and decoder decodes the serial input and sends the output to the micro controller and according to the information received by the micro controller the robot will move in that particular direction. The robot movement is driven with the help of L293D as driver IC. The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Micro Flash programmer is used for burning the developed code on Keil in to the microcontroller Chip. Here in the application using AT89C51 microcontroller which is Flash Programmable IC. AT represents the Atmel Corporation represents CMOS technology is used for designing the IC.

CHAPTER ONE

INTRODUCTION

1.0     Background of the Study

There is a serious need to ensure that alcohol impaired drivers stay off the road. It is estimated that one person is killed every 32 minutes and another person is injured every 26 seconds in alcohol related accidents. Highway death increase slightly from 41,717 death in 1999 to 41,812 in 2000. Forty present (16,725) involved alcohol, an increase from 38% the previous year.

Alcohol depends on the blood to breath ratio. This ratio describes the relationship between the alcohol content of the breath and the alcohol content of blood at any given time. The acceptable ratio of breath to alcohol to blood alcohol is 2,100:1. This means 2,100ml of a deep air lung same amount of alcohol as 1ml of blood. All breath testing instruments developed since 1939 use this ratio. The ratio is guided by Henry’s Law, which states the quantity of gas that dissolves in a liquid at a standard temperature and pressure are directly proportional to the partial pressure of that gas in the gas phase

1.1     Statement of the Problem

The use of alcohol by drivers has been identified as one of the major causes of road accidents on our roads.

1.2     Aim and Objectives of Study

          The main aim of this project is to design and construct an alcohol detector that will indicate the present of alcohol in a person through breathe.

1.3     Significance of the Study

The project will be beneficial to vehicle users, this prevent accident cause by the influence of alcohol.

1.4       Scope of Study

          The system detects the parent of alcohol in ones breath sample and decides whether one can operate and control the vehicle or not.

It is being used in many countries as ignition interlock system has been helpful to decrease the number of accidents.

          It is wired in a way that before starting the car, the driver has to submit a breath test through a tube joined to dashboard monitor.

1.5    Limitation of Study

 The following were the difficulties that were encounter during the cost of this work:

  1. Reference  material for the research of this work was difficult to get. It is time consuming
  2. It was difficult to get good component due to much fake once in the market.