CNG LPG gas sensor with display accuracy Mq9 Mega32 microcontroller

[yashar88]

Please help
I'm mq9 sensor gas sensor project with Mega32 microcontroller
My problem is that the actual amount of gas in the LCD display I have read the data sheet but the formula was not able to find it. Codes Leave it to me.
Please help me.

 

[davoud]

This sensor suitable for detection not for measurement quantity.
My I ask you what do you do?

 

[yashar88]

Thanks for the guide
The final project for university
I want the exact amount of gas in the lcd returns, and the wireless module 900 SMS me the exact amount of gas.
Please can anyone help me.

 

[davoud]

Amount of gas, okay but what is your space that you want to measure gas at it ? at the tank , room space ? please specify more about your project ( pressure , humidity , temperature and etc)

 

[yashar88]

Thanks again for your help
Gas Leak Detection at Home
At 25 to 35 ° C

 

[davoud]

Dear Yashar I think you can use MQ-4 for this subject but I'm not sure it work properly.

 

[yashar88]

Thank you for reading my post
I read the data sheet mq4 but some kind of gas sensor detects as mq9
I mq9 connected to the mega32 and LPG sensing LCD shows the numeric value.
I have written code for adc: A = read_adc (0) / 10
Instead of (10 /) is a number that shows the actual amount of gas.
Configuration of the adc is as follows:

- - - Updated - - -

#include <stdio.h>
#include <stdlib.h>
#include <delay.h>
#include <mega32a.h>

// Alphanumeric LCD functions
#include <alcd.h>

/*Declaring Global Variables*/




#define ADC_VREF_TYPE 0x00

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
// Delay needed for the stabilization of the ADC input voltage
delay_us(10);
// Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x08;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// USART disabled
UCSRB=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 62.500 kHz
// ADC Voltage Reference: AREF pin
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0x87;

// SPI initialization
// SPI disabled
SPCR=0x00;

// TWI initialization
// TWI disabled
TWCR=0x00;

// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTB Bit 0
// RD - PORTB Bit 1
// EN - PORTB Bit 2
// D4 - PORTB Bit 4
// D5 - PORTB Bit 5
// D6 - PORTB Bit 6
// D7 - PORTB Bit 7
// Characters/line: 16
lcd_init(16); /*lcd initialization*/


int A;
while(1)

{
A=read_adc(0)/10;
lcd_puts("%d",A);
lcd_clear();
delay_ms(1000);

}

 

[hd_uni_pro]

hello
i bought 2 sensor model :mh3-h2s 3 pin and md 440d 5 pin from winsensor comapny .please introduce circuit for connect with micro .Either directly or indirectly