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Showing posts from June, 2023
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 Mini Breadboard:- https://amzn.to/3Ulqv3G Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW 220 Ohm Resistor:- https://amzn.to/3ZPIUXv Red, Yellow and Green LED:-  https://amzn.to/3PPUbpF 9V Battery:-  https://amzn.to/44mJ5Mu

Traffic Light Code

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 void setup() {  pinMode(13,OUTPUT);  pinMode(12,OUTPUT);  pinMode(11,OUTPUT); } void loop() {  digitalWrite(13,HIGH);  delay(4000);  digitalWrite(13,HIGH);  delay(500);  digitalWrite(13,LOW);  delay(500);  digitalWrite(13,HIGH);  delay(500);  digitalWrite(13,LOW);  delay(500);  digitalWrite(13,HIGH);  delay(500);  digitalWrite(13,LOW);  delay(500);     digitalWrite(11,HIGH);  delay(4000);  digitalWrite(11,HIGH);  delay(500);  digitalWrite(11,LOW);  delay(500);  digitalWrite(11,HIGH);  delay(500);  digitalWrite(11,LOW);  delay(500);  digitalWrite(11,HIGH);  delay(500);  digitalWrite(11,LOW);  delay(500);  digitalWrite(11,HIGH);  delay(500);  digitalWrite(11,LOW);  digitalWrite(12,HIGH);  delay(2000);  digitalWrite(12,LOW);  delay(100); }

Traffic Light Circuit Diagram

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Materials Required for mq2 gas sensor

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  Mini Breadboard:- https://amzn.to/3Ulqv3G Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW MQ-2 Gas Sensor:- https://amzn.to/3KHEkFt 5V Buzzer and 9V Battery:- https://amzn.to/3KkLNK9 Green-Red LED:- https://amzn.to/3nWWawe 220 Ohm Resistor:- https://amzn.to/3ZPIUXv Hookup Wire:- https://amzn.to/3nWXBuK

Arduino Code for mq2 sensor

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  ////////////////Written by "Simple Circuits"////////////////////// int Input = A0; int Buzzer = A1; int GreenLED = A2; int RedLED = A3; int value; int MAX = 600; void setup() {   Serial.begin(9600);   pinMode(Input ,INPUT);   pinMode(RedLED ,OUTPUT);   pinMode(GreenLED ,OUTPUT);   pinMode(Buzzer ,OUTPUT); } void loop() {   value = analogRead(A0);   if (value >= MAX) {     digitalWrite(GreenLED ,LOW);     digitalWrite(RedLED ,HIGH);     digitalWrite(Buzzer ,HIGH);     delay(5000);     digitalWrite(Buzzer ,LOW);     delay(6000);   }   else {     digitalWrite(RedLED ,LOW);     digitalWrite(Buzzer ,LOW);     digitalWrite(GreenLED ,HIGH);   } }

mq2 gas sensor circuit diagram

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  Mini Breadboard:- https://amzn.to/3Ulqv3G Arduino UNO:- https://amzn.to/3mhamzG Jumper Wires:- https://amzn.to/3GvV1SW MQ-2 Gas Sensor:- https://amzn.to/3KHEkFt 5V Buzzer and 9V Battery:- https://amzn.to/3KkLNK9 Green-Red LED:- https://amzn.to/3nWWawe 220 Ohm Resistor:- https://amzn.to/3ZPIUXv Hookup Wire:- https://amzn.to/3nWXBuK