9 db/1 tétel gázérzékelő érzékelő modul MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 érzékelő modul gázérzékelő indítókészlet
9PCS/1Lot Gas Detection Sensor Module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module Gas Sensor Starter Kit
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Gas detection module MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 each of them 1pcs total 9pcs sensor for arduino kit
Shipping list:
Features:
 
Using high-quality dual-panel design,with power indicator and TTL signal output instructions
The switching signal having a DO (TTL) output and analog output AO
TTL output valid signal is low ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
Analog output voltage with the higher concentration of higher voltage
There are four screw holes for easy positioning
Has a long life and reliable stability
Rapid response and recovery characteristic
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 01 and 5V)
AO output :01-0 3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered,needs to warm up around 20S,measured data was stable,heat sensor is a normal phenomenon,because the internal heating wire,if hot is not normal
Wiring:
VCC: positive power supply (5V)
GND: power supply is negative
DO: TTL switching signal output
AO: analog signal output
NOTE:
After the sensor is powered, need to warm about 20S, measured data becomes stable, heat sensor is normal
 
Size:
 
Test program:
 
Function: This version of the test program supporting
Use chip: AT89S52
Crystal: 110592MHZ
Baud rate: 9600
Compiler Environment: Keil
[Statement] This procedure is used only for study and reference, please indicate the copyright and author information!
************************************************** ******************* /
/ ************************************************* *******************
Note: 1, when the measured concentration is greater than the set density, single-chip IO port output low
************************************************** ******************* /
# Include // library files
#define uchar unsigned char // macro definition unsigned char
#define uint unsigned int // macro definition unsigned int
 
/ ************************************************* *******************
I / O definitions
************************************************** ******************* /
sbit LED = P1 ^ 0; // define microcontroller P1 port of the first one (ie P10) to indicate the end
sbit DOUT = P2 ^ 0; // define the microcontroller P2 port first one (ie P20) as an input sensor
/ ************************************************* *******************
Delay function
************************************************** ******************* /
void delay () // delay procedure
{
uchar m, n, s;
for (m = 20; m> 0; m--)
for (n = 20; n> 0; n--)
for (s = 248; s> 0; s--);
}
/ ************************************************* *******************
The main function
************************************************** ******************* /
void main ()
{
while (1) // infinite loop
{
LED = 1; // off P10 port lights
if (DOUT == 0) // When the concentration is higher than the set value, the implementation of the Con
{
delay (); // delay interference
When if (DOUT == 0) // determine the concentration higher than the set value, the implementation of the Con
{
LED = 0; // P10 port lights lit
}
}
}
}
/ ************************************************* *******************
End
************************************************** ****************** /
32714696615 - suq