Write a program to interface LED and Buzzer with Arduino board, so that buzzer is put on whenever LED is on and Buzzer is put off when LED is off.
Last Updated : 13 Nov 2025
Solution:
void setup(){
pinMode(2, OUTPUT); // PIN 2 = LED
pinMode(3, OUTPUT); // PIN 3 = Buzzer
}
void loop(){
digitalWrite(2, HIGH); // Turn on the LED
digitalWrite(3, HIGH); // Turn on the Buzzer
delay(5000); // Wait for 5 seconds
digitalWrite(2, LOW); // Turn off the LED
digitalWrite(3, LOW); // Turn off the Buzzer
delay(2000); // Wait for 2 seconds
}Meanwhile you can watch this video
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