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Interfacing of Arduino with Push button :

interfacing

ARDUINO CODE

int buz = 3; // Buzzer is connected on Pin No. 3
int but = 4; // Push Button is connected on Pin No. 4
int val;

void setup( )
{
  pinMode(buz, OUTPUT); // Buzzer mode is OUTPUT.
  pinMode(but, INPUT); // Push Button mode is INPUT.
}

void loop()
{
  val = digitalRead (but); // Reads the value from Push Button whether it is pressed or not.
  if (val == LOW) 
  { 
    digitalWrite(buz,HIGH); // Buzzer is turned ON.
  }
  else
  {
    digitalWrite(buz,LOW); //  Buzzer is turned OFF.
  }
}

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