Course Content

The road accidents are increasing at high rate now a day. Traffic authority also taking several measures to bring down the accidents. Immediate action will be taken if any violates the traffic rules. The drink and drive is one of the case because of which the road accidents may happen. Drinking is not an offense but drinking and driving is an offense. A drunken driver may not only cause harm to his life, he may take lives of others too. So this is one of the serious cases to be controlled. We proposed a system to solve the problem. This project implements an automated system which checks for alcohol level of the driver and the engine will be turned ON only if the alcohol level is below some limit. 

There will be a microcontroller Arduino Nano, motors, are connected. The alcohol sensor output is connected to the ADC the resistance of alcohol sensor is varied according to the alcohol content. The change is resistance leads to voltage change which is given as input to the ADC. The ADC will give corresponding output in terms of digital value.

          As the module is turned ON, the controller will wait for ignition key. As the key is pressed, the ADC value will be checked. The engine will be turned ON only if the alcohol level is lesser than the limit. The ON and OFF condition of engine is shown by a motor.

The driver may have the alcohol even while driving. So the microcontroller will be keep checking for the alcohol level and tilt continuously. In case the level increases goes beyond the limit, the engine will be automatically turned OFF and a warning message will be displayed along with buzzer alert. If the tilt is detected, the buzzer indication and message will be given.

Hardware Components:

1.     Arduino Nano

2.     Alcohol Sensor

3.     Power Supply (12V DC Adapter)

4.     Driver Circuit (L293D)

5.     7805 Voltage Regulator

6.     Buzzer

7.     Jumper Wires

8.     Bread Board (170 Points)

9.     Berg sticks (male to male)

Our project Alcohol Detection System was implemented successfully. This device provides much advanced facilities in now a day’s life as it can be easily implemented in vehicles. Thus we can reduce alcohol related road accidents and hence these kinds of detectors have a great relevance. It can also be used in schools, colleges, offices and some public places such as hospitals, libraries etc. Through this project we present simple hardware interfacing.