Monday, February 27, 2017
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Learn the fundamentals of electronic circuit analysis -Udemy
Introduction to Electronic Circuit Analysis
Tuesday, February 14, 2017
How to build Gas Leakage using gas leak detector in your home kitchen doing Arduino Projects in pakistan
How to build Gas Leakage using gas leak detector in your home kitchen doing Arduino Projects
I selected 2 Projects related to gas leak detector in Kitchen using arduino language using MQ5 gas
sensor and GSM Module.
List
of Arduino Projects
A actual interesting gas leak detector arduino project using MQ5
gas sensor and GSM Module. This project – named as – Gas Leakage Detector using Arduino has the following
objectives:-
Sense the existence of LPG
or other types of gases like CH4, Butane etc with help of MQ5 gas sensor and
Arduino. Send 3 SMS Alerts (with a message like ‘Gas Leaking at Kitchen’)
to listed mobile numbers in the program with the assistance of GSM Module and
Arduino Produce a Sound Alarm upon gas leak with help of
Arduino and Buzzer. Turn the Relay ON with help of Arduino to activate a
certain function – say cut off electrical supply to kitchen!
The package in this project also checks for shutdown process – that is –
if the gas leak problem has been lectured and eliminated properly using this gas leak detector. When the gas leak problem has been eliminated
totally and the room is completely back to normal conditions, the project will
reactivate its “gas leakage scanning mode”. This unique is a very useful
arduino project – which finds lots of application in home and industry.
A very power burglar
alarm or intruder alarm system using PIR Sensor and Arduino – with SMS Alert
(using GSM Module) and Sound Alarm.
Objectives of this project are as described below:-
§
Detect a wave – an intruder or a burglar using PIR sensor
§
Trigger the signal alarm upon detection of burglar/intruder –
Alarm should sound until Reset switch is pressed
§
Send 3 SMS to a predefined mobile number set intimate the
program.
§
Stop the alarm when reset switch is pressed. Also reactivate the
SMS alert facility upon reset.
This apparently simple
but feature rich projects is extremely appropriate for engineering course contentment
and to install in home/office premises as a hobby setup.
Click here to purchase
these items my recommended electronics circuit store in Pakistan.
I also purchased lot of
items related to different projects using home shop delivery.
SHOP - City ElectronicsPK - Pakistan's Online Electronics
Store
URL: www.cityelectronics.pk/
LPG sensor
using arduino
LPG sensor using arduino
with alarm and cutoff.
A simple LPG sensor using arduino is shown in this article. This
circuit indicates the amount of LPG in the air. The circuit sounds an
alarm and trips a relay when the concentration is above a predetermined
level. MQ2 is the gas sensor used in this project. MQ2 is an SnO2 based gas
sensor which can sense gases like methane, propane, butane, alcohol, smoke,
hydrogen etc. Since LPG primarily contains propane and butane, MQ2 sensor can
be used for sensing LPG. The figure below shows the schematic and arrangement
of an MQ2 gas sensor.
MQ2
sensor senses the flammable gases by the increase in temperature when they are corroded
by the heating element. Consider the figure given above. If there is any
flammable gas present in the sample, the oxidization of the same gas results in
increased temperature and the resistance of the sensor resistor will drop. That
worth more current will flow through the load resistor and so the voltage
across it will shoot up.
At
normal conditions (no LPG in the air), the sensor resistor will be very high
around 850K. So the voltage drop Volt across the load resistor will be around
zero. When the sensor is fully exposed to LPG the sensor resistance drops to
around 800 ohms and the voltage drop across the load resistance will be around
4.62 volts. After conversion by the ADC, the digital equivalent of
4.62 volt will be 948 and it is stored in the variable “d” (refer the program
). Figure below shows a graph plotted from the observed parameters.
The
concentration percentage for a given digital output of the ADC can be
determined using the following equation. p=d/9.48 where d is the digital output
of the ADC and p is the percentage. The equation is obtained by finding the
equation of the above graph in the general form y=mx+c. Where m is the slope
and c is the y intercept. The full circuit diagram of the LPG sensor using
arduino is shown below.
Circuit diagram.
Program.
#include<LiquidCrystal.h>
int mq2=A0;
int rel=13;
int buz=10;
int d;
float p;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup()
{
pinMode(rel,OUTPUT);
pinMode(buz,OUTPUT);
digitalWrite(rel,LOW);
digitalWrite(buz,LOW);
lcd.begin(16,2);
}
void loop()
{
d=analogRead(mq2);
lcd.setCursor(0,0);
lcd.print("LPG SENSOR");
if(d<60)
{
p=0;
}
else
{
p=(d-60)/9.64;
}
lcd.setCursor(0,1);
lcd.print(p);
lcd.setCursor(5,1);
lcd.print("%");
if(p>=30)
{
digitalWrite(rel,LOW);
digitalWrite(buz,HIGH);
lcd.setCursor(9,1);
lcd.print("TRIP");
}
else
{
digitalWrite(rel,HIGH);
digitalWrite(buz,LOW);
}
delay(500);
lcd.clear();
}
Notes.
§
MQ2 sensor needs a
24 hour preheat for steady operation.
§
The warming
coil of the MQ2consumes around150mA and so it is wise to power the coil from a
separate source.
§
5V required at other
parts of the circuit can be selected from the arduino board.
§
The arduino board
can be powered through the 9V power supply jack.
Click here to purchase
these items my recommended electronics circuit store in Pakistan.
SHOP - City ElectronicsPK - Pakistan's Online Electronics
Store
URL: www.cityelectronics.pk/
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