Ken Loach

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Arduino and MQ 2 gas sensor

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Sound Sensor with arduino Code : #include <LiquidCrystal.h> const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); void setup(){ lcd.begin(16, 2); Serial.begin(9600); // open serial port, set the baud rate to 9600 bps } void loop(){int val; val=analogRead(0); //connect mic sensor to Analog 0 Serial.print("Sound="); Serial.println(val,DEC);//print the sound value to serial lcd.setCursor(0, 0); lcd.print("Sound="); lcd.print(val); lcd.print(" "); delay(1000);}
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