CAREER POINT UNIVERSITY

• Submitted to :• Mr. Pankaj Chawla• HOD • EE depart

• Submitted by:• Ravi Shankar Prasad• Shahrukh Khan• Abran Ansari

AUTONOMOUS ROBOT WITH LPG GAS SENSOR USING ARDUINO UNO

INTRODUCTION

• This is an autonomous robot using arduino microcontroller ,with LPG gas sensor and buzzer alarming us about the gas leakage.

COMPONENTS• Arduino microcontroller• Motor driver• Buzzer(5 volt)• LPG gas sensor MQ6• Chasis• 2 Batteries(9 volt)• Wheels ( 2 wheels)• 1 caster wheel• Arduino IDE• USB Cable to upload program• A lighter

ARDUINO UNO

ARDUINO

• Arduino is a micro controller which is used as a physical computing platform on a simple input and output board . Its an open source hardware ,for building digital devices and interactive devices that can sense and control physical devices

MOTOR DRIVER (L293D)

L293D IC

L293D Description: L293D is a typical Motor driver or Motor Driver IC which allows DC motor to drive on either direction. L293D is a 16-pin IC which can control a set of two DC motors simultaneously in any direction. It means that you can control two DC or geared motor with a single L293D IC. Dual H-bridge Motor Driver integrated circuit (IC).ConceptIt works on the concept of H-bridge. H-bridge is a circuit which allows the voltage to be flown in either direction. As you know voltage need to change its direction for being able to rotate the motor in clockwise or anticlockwise direction, Hence H-bridge IC are ideal for driving a DC motor.In a single l293d chip there two h-Bridge circuit inside the IC which can rotate two dc motor independently. Due its size it is very much used in robotic application for controlling DC motors. Given below is the pin diagram of a L293D motor controller.There are two Enable pins on l293d. Pin 1 and pin 9, for being able to drive the motor, the pin 1 and 9 need to be high. For driving the motor with left H-bridge you need to enable pin 1 to high. And for right H-Bridge you need to make the pin 9 to high. If anyone of the either pin1 or pin9 goes low then the motor in the corresponding section will suspend working. It’s like a switch.TIP: you can simply connect the pin16 VCC (5v) to pin 1 and pin 9 to make them high.

GAS SENSOR MODULE

LPG GAS SENSOR MODULE DESCRIPTION: This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm.This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.

PG Gas Sensor (MQ6) Features: High Sensitivity to LPG, iso-butane, propaneSmall sensitivity to alcohol, smokeDetection Range: 100 - 10,000 ppm iso-butane propaneFast Response Time: <10sSimple drive circuitHeater Voltage: 5.0V

It has 4 pins 5volt connected to 5v in arduino UNOGND of lpg gas sensor to arduino UNODOUT, AOUT to A0 in arduino UNO

L293D IC

ADVANTAGES

• It is act as a home security by alarming us when there is over leakage of LPG gas .

• Low cost effective.• Safety in industries.

ASSEMBLED BOT WITH LPG GAS SENSOR MODULE

THANK YOU…..