Smoke and Gas Sensor

In this project, we will use the MQ-02 sensor to detect smoke and gas.

Aug 3, 2019

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Components and supplies

Arduino Uno Rev3

MAX30105 High-Sensitivity Optical Sensor for Smoke Detection Applications

5 mm LED: Red

Buzzer

3 mm LED: Green

Jumper wires (generic)

Project description

Code

Smoke and gas sensor code

arduino

to implement in the kitchen or workshop

1int VALOR;
2int AVISO = 2;
3int VERDE = 3;
4
5void setup() {
6  pinMode(A0, INPUT);
7  pinMode(AVISO, OUTPUT);
8  pinMode(VERDE, OUTPUT);
9}
10
11void  loop() {
12  digitalWrite(VERDE, HIGH);
13  VALOR = analogRead(A0 > 400);
14  if(VALOR == 400) {
15    digitalWrite(AVISO, HIGH);
16    delay(500);
17    digitalWrite(AVISO,  LOW);
18    delay(500);
19  } 
20  
21}

int VALOR;
int AVISO = 2;
int VERDE = 3;

void setup() {
  pinMode(A0, INPUT);
  pinMode(AVISO, OUTPUT);
  pinMode(VERDE, OUTPUT);
}

void  loop() {
  digitalWrite(VERDE, HIGH);
  VALOR = analogRead(A0 > 400);
  if(VALOR == 400) {
    digitalWrite(AVISO, HIGH);
    delay(500);
    digitalWrite(AVISO,  LOW);
    delay(500);
  } 
  
}

Smoke and gas sensor code

arduino

to implement in the kitchen or workshop

1int VALOR;
2int AVISO = 2;
3int VERDE = 3;
4
5void setup() {
6   pinMode(A0, INPUT);
7  pinMode(AVISO, OUTPUT);
8  pinMode(VERDE, OUTPUT);
9}
10
11void   loop() {
12  digitalWrite(VERDE, HIGH);
13  VALOR = analogRead(A0 > 400);
14   if(VALOR == 400) {
15    digitalWrite(AVISO, HIGH);
16    delay(500);
17    digitalWrite(AVISO,   LOW);
18    delay(500);
19  } 
20  
21}

int VALOR;
int AVISO = 2;
int VERDE = 3;

void setup() {
   pinMode(A0, INPUT);
  pinMode(AVISO, OUTPUT);
  pinMode(VERDE, OUTPUT);
}

void   loop() {
  digitalWrite(VERDE, HIGH);
  VALOR = analogRead(A0 > 400);
   if(VALOR == 400) {
    digitalWrite(AVISO, HIGH);
    delay(500);
    digitalWrite(AVISO,   LOW);
    delay(500);
  } 
  
}

Downloadable files

schematic

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