This project focuses on developing a vehicle safety system that uses an alcohol detector to prevent accidents caused by drunk driving. It integrates an MQ-3 alcohol sensor with a microcontroller to monitor blood alcohol content and control the ignition system of the vehicle, thereby enhancing safety. The project aims to address the significant issue of impaired driving incidents and proposes a solution that can also be applied in various industries and educational settings.

1. VEHICAL CONTROL BY ALCOHOL DETECTOR
BY:
DHRUV AGARWAL(12-EEU-014)
HEEVAN SHER(12-EEU-020)

2. INTRODUCTION:
• The purpose of this project is to develop vehicle accident
prevention by method of alcohol detector in an effort to reduce
traffic accident cases based on driving under the influence
alcohol.
• This project is developed by integrated the alcohol sensor with the
• microcontroller.
• The alcohol sensor used in this project is MQ-3 which to detect the
present of alcohol content in human breath.
• An ignition system which will produce spark plugs is build up as a
prototype to act like the ignition starter over the vehicle’s engine.
• The ignition system will operate based on the level of blood
alcohol content (BAC) from human breaths detected by alcohol
sensor.

3. CHARACTERISTICS OF the project :
• An embedded system is some combination of computer hardware and
software, either fixed in capability or programmable, that is specifically
designed for a particular function
• The Keil C51 C Compiler for the 8051 microcontroller is the most popular
8051 C compiler in the world.
• The C51 Compiler allows you to write 8051 microcontroller applications in
C that, once compiled, have the efficiency and speed of assembly language.
Language extensions in the C51 Compiler give you full access to all
resources of the 8051.
• We run the vehicle by using wireless communication i.e. from Control
section (acts as transmitter) we are ejecting the control signals, then the
vehicle receives (acts as receiver) the signals, according to the signals it will
give a alarm or buzzer.

4. NEED FOR THE PROJECT
• Compelling need for the innovation “ Alcohol Detection with
vehicular system” provides an automatic safety system for cars and
other vehicles as well.
• Frequent and highly publicized enforcement can be effective in
reducing drinking and driving if people perceive there is a credible
threat of being caught –but it will not eliminate it.
• 800 million drink driving trips annually (NHTSA, 2003) 0.02% of
all trips
• 1.5 million drivers arrested for DWI annually ƒ
• Less than 1% of drunk drivers 130,000 alcohol ignition interlocks
in use in U.S. ƒ
• Approximately 10% of those convicted of DWI

5. APPLICATIONS OF EMBEDDED SYSTEM :
• Military and aerospace embedded software
applications.
• Communication applications.
• Industrial automation and process control software
• Mastering the complexity of applications.
• Reduction of product design time.
• Real time processing of ever increasing amounts of
data.
• Intelligent, autonomous sensors.

6. Embedded
Systems
Computer
Architecture
Software
Engineering
Data
Communication
Control
Engineering
Electric motors
and actuators
Sensors and
measurements
Analog
Electronic design
Digital
Electronic design
Integrated circuit
design
APPLICATIONS OF EMBEDDED SYSTEM
Operating
Systems Build
Download
Debug
Tools

7. BLOCK DIAGRAM

8. Components used:
• Resistance
• Capacitance
• LED
• Alcohol sensor
• Transistor
• Microcontroller 8051
• LCD display
• Connecting chords
• DC motor
• 4*3 keypad matrix
• Solder
• Relays
• Voltage Regulator
SOFTWARE REQD:
KEIL Compiler

10. MICROCONTROLLER(8051)
• The AT89C52 is a low-power,
high-performance CMOS 8-
bit microcomputer with 8K
bytes of Flash programmable
and erasable read only
memory (PEROM).
• The device is manufactured
using Atmel’s high-density
nonvolatile memory
technology and is compatible
with the industry-standard
80C51 and 80C52 instruction
set and pinout.

11. RESISTANCE:
• Resistance is the opposition
of a material to the current.
It is measured in Ohms (W).
• All conductors represent a
certain amount of
resistance, since no
conductor is 100% efficient.
• The most common type of
resistors used in our
projects is carbon type.
COLOURS CODE
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Grey 8
White 9

12. CAPACITANCE
• It is an electronic
component whose function
is to accumulate charges
and then release it.
• Capacitors are of two types:
(1) Fixed type :like ceramic,
polyester, electrolytic
capacitors-these names
refer to the material they
are made of aluminium foil.
(2) Variable type :like gang
condenser in radio or
trimmer.

13. LIGHT EMITTING DIODE
• When a junction diode is
forward biased, energy is
released at the junction
diode is forward biased due
to recombination of
electrons and holes.
• In silicon and germanium
diodes, the energy released
is in infrared region. In the
junction diode made of
gallium arsenate or indium
phosphide, the energy is
released in visible region.

14. LCD DISPLAY
• Certain organic large size
molecule types of liquids
possess properties, which
cause them to interfere with
light passage in them.
• One glass plate has the 7
segment electrodes etched
on it and a conductive
coating of tin oxide or Tin
cum Indium oxide. The
other plate has the common
electrode.

15. RELAYS
• A relay is an electrical switch
that opens and closes under
control of another electrical
circuit.
• When electricity is applied to the
wire, the rod becomes magnetic.
A movable contact arm above
the rod is then pulled toward the
rod until it closes a switch
contact.
• When the electricity is removed,
a small spring pulls the contract
arm away from the rod until it
closes a second switch contact.

16. BUZZER
 Buzzer is a audio signal device
 Works on electromechanically
or piezoelectric Circuit.
 Buzzer act as alarm of the
circuit
 The vibration of metal plate
causes a sound

17. DC MOTOR
• A DC motor is any of a class
of electrical machines that
converts direct current
electrical power into
mechanical power. The
most common types rely on
the forces produced by
magnetic fields.
• Most types produce rotary
motion; a linear motor
directly produces force and
motion in a straight line.

18. VOLTAGE REGULATOR
• A voltage regulator is designed to
automatically maintain
a constant voltage level.
• A voltage regulator may be a
simple feed-forward design or
may include negative
feedback control loops. It may
use an
electromechanical mechanism or
electronic components.
• Depending on the design, it may
be used to regulate one or
more AC or DC voltages.

19. PUSH BUTTON
• A push-button is a
simple switch mechanism
for controlling some aspect
of a machine or a process.
• Buttons are typically made
out of hard material,
usually plastic or metal.
• The surface is usually flat
or shaped to accommodate
the human finger or hand,
so as to be easily depressed
or pushed.

20. ALCOHOL SENSOR
• The alcohol sensor circuit will detect the
alcohol depends on human breath and the
signal will send data to PIC 16F876A as a
controller to other circuits.
• The result of human breath contains
alcohol that has detected from alcohol
sensor circuit will display on the LCD 16x2
display.
• It has a high sensitivity and fast response
time. Sensor provides an analog output
based on alcohol concentration.
• The sensor needs 5V power supply to
operate.

21. CONNECTION DIAGRAM

22. APPLICATION USED IN THE PROJECT

23. Applications and Advantages:
• Can be used for security purpose.
• Same project can be implemented in industry or
educational institutes.
Future Development:
• Wireless is the buzz of communication industry
today.
• The field of wireless communication is growing leaps
and bounds day by day.
• There have been many advancements taking place
in the semiconductor industry leading to more and
more advancements in wireless technology.