Automatic Car Engine Locking System through Alcohol Detector

INTRODUCTION  

These days, we are seeing that road accidents are happening due to the drunk driver. If the drunk driver is not in the right position then the chances of road accident are high and the question of life and death for the person sitting in the vehicle and the person walking on the road become. The system we built his program is written in Embedded C. 

The main objective of making this system is that accidents caused by drunk drivers can be minimized. The government should implement laws to put this system is every vehicle and every vehicle company must put this system while making a vehicle, so that road accident can be reduced. This problem also exists in countries around in the world. In this system we have use Node MCU, alcohol sensor and buzzer. If the driver has consumed more alcohol when the limit then the engine will stop immediately and will not start and the buzzer will continue to ring. With the system, accident can be minimized which will be beneficial for future or for all people.

 Methodology

 HARDWARE  REQUIREMENT  

•      MQ3 Alcohol Sensor   

•      ESP8266 Node MCU  

•      L293D IC

•      DC Motor

•      Connecting Wires

•      Bettery (9v)

        

SOFTWARE  REQUIREMENT  

•      Arduino IDE

DESCRIPTION OF COMPONENTS  

1. MQ3 ALCOHOL SENSOR

This sensor has four pins. This sensor is used to make an accurate decision of alcohol. This sensor can detect the presence of alcohol to the extent of 2 meters. This sensor has high sensitivity. Its limit ranges from 0.05 mg/L to 10 mg/L. There is a layer of SnO₂ in it, if the alcohol is high then its sensitivity increases and if there is low or not, then its sensitivity is low. 

Features of MQ-3 Alcohol Sensor

•      Sensor Type - Semiconductor

•      Easy SIP header interface

•      Compatible with most of the microcontrollers

•      Low-power standby mode

•      Requires heater voltage

•      Good sensitivity to alcohol gas

•      Fast response and High sensitivity

•      Long life and low cost

 

2. NODE MCU

Node MCU is an open source platform and has a chip of esp8266 wifi module, 128KB RAM and 4 MB flash memory to store the program and data. Its operating system range is 3v to 3.6 and it consists of 17 GPIO pins. It has communication speed 4.5 Mbps.

 NodeMCU is a development board based on ESP8266. It is operating system range is 3v to 3.6. Interface a GPS module with NodeMCU. In this project we will use NodeMCU to create a simple local web server and the location details and update in that server web page.

NodeMCU  Specification:

Type :  Single-board microcontroller

CPU : ESP8266

Memory : 128kBytes

Storage : 4MBytes

Power By : USB

Power Voltage : 3v ,5v (used with 3.3v Regulator which inbuilt on Board using Pin VIN)

IDE Used : Arduino IDE

GPIO : 10 pins

                       

3. L293D IC

L293D IC is mainly used to control the speed and direction. This IC has 16 pins of which are 4-input, 4-output, 4-gnd, 2-enable, 1-vs and 1-vss. This IC we can run two DC Motor. This supply voltage range is 4.5v to 7v.[4]

Features of MQ-3 Alcohol Sensor

•      Separate Input-Logic Supply

•      Can be used to run Two DC motors with the same IC.

•      Speed and Direction control is possible

•      Motor voltage Vcc2 (Vs or pin 8): 4.5V to 36V

•      Maximum Peak motor current: 1.2A

•      Supply Voltage to Vcc1(vss or pin 16): 4.5V to 7V

                                                  

4. DC MOTOR

The function of a DC motor is to convert electrical energy into mechanical energy.

DC Motor consists with two parts, first one is stator and second is rotor.[5] Dual shaft DC motor with gear box which gives good torque and rpm at lower voltages. This motor can run at approximately 200rpm when driven by a Dual LiIon cell battery at 6 V and approximately at 300 rpm when driven by a 9V Li-Ion cell.

It is most suitable for light weight robot running on small voltage. Out of its two shafts one shaft can be connected to wheel, other can be connected to the position encoder.

DC MOTOR CHARACTERISTICS

•      Runs on DC power or AC line voltage with a rectifier

•      Operating speeds of 1,000 to 5,000 rpm

•      60-75% efficiency rate

•      High starting torque

•      Low no-load speeds

                                      

SOFTWARE REQUIREMENT 

1. Arduino IDE

ARDUINO IDE

•      It is a cross-plate form application in an integrated development environment. It is used for writing and uploading experiments on Arduino compatible board such as Arduino UNO, Arduino micro, NodeMCU ESP8266 etc.

•      Arduino IDE is an open source software that is mainly used for writing and compiling the code into the Arduino Module.

•      It is an official Arduino software, making code compilation too easy that even a common person with no prior technical knowledge can get their feet wet with the learning process.

•      It is easily available for operating systems like MAC, Windows, Linux and runs on the Java Platform that comes with inbuilt functions and commands that play a vital role for debugging, editing and compiling the code in the environment.

•      A range of Arduino modules available including Arduino Uno, Arduino Mega, Arduino Leonardo, Arduino Micro and many more.

•      Each of them contains a microcontroller on the board that is actually programmed and accepts the information in the form of code.

•      The main code, also known as a sketch, created on the IDE platform will ultimately generate a Hex File which is then transferred and uploaded in the controller on the board.

•      The IDE environment mainly contains two basic parts: Editor and Compiler where former is used for writing the required code and later is used for compiling and uploading the code into the given Arduino Module.

•      This environment supports both C and C++ languages.

Features of Arduino IDE

•      Sketch Editing Tools

•      Libraries

•      Serial Monitor

•      Programmer Functions

•      Burn Bootloader

•      Sketches Management

•      Sharing

•      Auto Format

•      User Preferences

•      Fix Encoding & Reload

•      Board Selection & Management

•      Project Documentation

•      Sketch Archive

•      Port Menu

•      Sketchbook

•      Sketches Management

Connections 

  NodeMCU to IC Connection  

NodeMCU	L293D IC
D1	Pin1(En1)
D2	Pin2(Input1)
Gnd	Pin4(Gnd)
Gnd	Pin5(Gnd)
D3	Pin7(Input2)
D5	Pin9(En2)
D6	Pin10(Input3)
Gnd	Pin12(Gnd)
Gnd	Pin13(Gnd)
D7	Pin15(Input4)
3.3 v	Pin16(Vcc1)

NodeMCU to MQ3 Alcohol Sensor  

NodeMCU	MQ3 Alcohol Sensor
A0	Analog Pin
NC	Digital Pin
Gnd	Gnd
3.3v	Vcc

 

9v Battery to IC

9v Battery	L293D IC
Vcc	Pin8(Vcc2)

DC Motors to IC

DC Motors	L293D IC
A0	Pin3(Output1)
NC	Pin6(Output2)
Gnd	Pin11(Output3)
3.3v	Pin14(Output4)

NodeMCU to Button

NodeMCU	Button
D4	Input
Gnd	Gnd

PROPOSED SYSTEM

Using a Node MCU and alcohol sensor, a system is built that can detect from the breath of any person whether he has drunk or not. By using this system we can reduce road accident and make people’s lives safe.

This system consists of a Node MCU that controls each component used in the system. The Node MCU is connected to an alcohol sensor, a buzzer, a L293D IC and two DC motors. And with a 9 volt battery, we provide power supply. As soon as we turn on the system the alcohol detects alcohol. If there is no alcohol then the engine of the vehicle turns on and if there is alcohol then buzzer starts ringing and the engine stops.

ADVANTAGES 

1.     The main objective of making this system is that accidents caused by drunk drivers can be minimized.

2.     This system will reduce accidents and increase safety.

3.     This system can be implemented in different type of vehicles.

APPLICATIONS

1.     This system can be implemented in vehicle to avoid accidents caused by drunk driving.

2.     This system can also be used in various organizations and companies to monitor their employees.

RESULT

Finally after the design of system, If the driver has consumed more alcohol when the limit then the engine will stop immediately and will not start and the buzzer will continue to ring. With the system, accident can be minimized which will be beneficial for future or for all people.  

CONCLUSION

In this project, by putting in vehicle we can save human life. The main objective of making this system is that accidents caused by drunk drivers can be minimized.

After Compete This Project

             

FUTURE WORKS

1.     We can implement this technique further by making use of Internet of Things (IOT). 

2.     This module can also be implemented in heavy vehicles, shipping vehicles, air buses and sensing devices. 

3.     This can also be extended in bio medical fields and software industries.