Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential

ABSTRACTABSTRACT

For

Alcohol breath Analyzer using PIC microcontroller with displayAlcohol breath Analyzer using PIC microcontroller with display

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential - 1 -

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential

PROJECT DEFINITION / SPECIFICATION

PROJECT TYPE

Microcontroller(PIC16F877A) hardware design with software

development (Device Driver) . PIC micro controller (PIC16F877A)

based.

PROJECT DESCRIPTION

Our main motivation for creating the alcohol breath analyzer

is to get alert from drunken people. In general, in intoxicated people are usually

more care less and destructive than those not under the influence in our

particular house, kitchen and library are 2 rooms that are vocationally left by an

intoxicated. We decided to fabricate device that would allow sober housemates

to use the facility while keeping the drunken ones out. Our breath analyzer

initiates an alarm when a threshold concentration of alcohol is reached. The

microcontroller does the above job it receives the signals from the sensors, and

this signals operated under the control of software which is stored in ROM.

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential - 2 -

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential

BLOCK DIAGRAM

PROJECT OUTLINE

A brief introduction to internal architecture of microcontroller.

An over view of programming of microcontroller.

An overview on C language.

An overview on mechanical arrangement.

Alcohol sensor interfacing with microcontroller.

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential - 3 -

PIC16F877AController

16x2LCD

Relay Unit

SENSOR

Reset circuit

Oscillatory circuit Relay Unit

Alarm Unit

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential

INTERFACES USED

Serial communication used for downloading the hex code.

Sensor circuit interface.

LCD interfacing

Relay interfacing.

SOFTWARES USED

A Cross compiler for compiling and linking the code written for

PIC16F877A.

Serial communication software for downloading code to PIC16F877A.

Operating system: Windows XP.

Project Definition / Specification Alcohol breath analyzer with display using microcontroller

Confidential - 4 -