Gas detector

Simply give you a warning before you die! :D

Dec 20, 2021

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1 respects

gas leaks

gas detector

life saver

Components and supplies

Breadboard (generic)

LED (generic)

Arduino Nano R3

Jumper wires (generic)

Grove - Gas Sensor(MQ2)

10 LEDs Bar Array, Green

Project description

Code

arduino

1void setup() {
2pinMode(A0, INPUT);//sensor data input line
3pinMode(2,OUTPUT);//power  led
4pinMode(7,OUTPUT); //led
5pinMode(9,OUTPUT); //led
6pinMode(10,OUTPUT);  //led
7pinMode(11,OUTPUT); //led
8Serial.begin(9600); //serial monitor
9}
10
11
12float  val;
13void loop() {
14 val=analogRead(A0);
15 Serial.println(val);
16
17digitalWrite(2,HIGH);//power  led on
18
19if(val>500){//these values can be chnaged for your needs (ex:500)
20  
21  digitalWrite(7,HIGH);
22}
23else {
24  digitalWrite(7,LOW);
25}
26 if  (val>430){
27  digitalWrite(9,HIGH);
28}
29else {
30  digitalWrite(9,LOW);
31}
32if  (val>400){
33  digitalWrite(10,HIGH);
34}
35else {
36  digitalWrite(10,LOW);
37}
38
39  if (val>385){
40  digitalWrite(11,HIGH);
41}
42else {
43  digitalWrite(11,LOW);
44}
45
46
47
48
49
50
51
52  
53
54}
55

void setup() {
pinMode(A0, INPUT);//sensor data input line
pinMode(2,OUTPUT);//power  led
pinMode(7,OUTPUT); //led
pinMode(9,OUTPUT); //led
pinMode(10,OUTPUT);  //led
pinMode(11,OUTPUT); //led
Serial.begin(9600); //serial monitor
}


float  val;
void loop() {
 val=analogRead(A0);
 Serial.println(val);

digitalWrite(2,HIGH);//power  led on

if(val>500){//these values can be chnaged for your needs (ex:500)
  
  digitalWrite(7,HIGH);
}
else {
  digitalWrite(7,LOW);
}
 if  (val>430){
  digitalWrite(9,HIGH);
}
else {
  digitalWrite(9,LOW);
}
if  (val>400){
  digitalWrite(10,HIGH);
}
else {
  digitalWrite(10,LOW);
}

  if (val>385){
  digitalWrite(11,HIGH);
}
else {
  digitalWrite(11,LOW);
}







  

}

Downloadable files

Schematic

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dithirah

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