Arduino program to ‘turn ON’ LED for 1 sec after every 2 seconds

 

 Objective: To interface LED/Buzzer with Arduino Uno and write a program to ‘turn ON’ LED for 1 sec after every 2 seconds.

Code:

// the setup function runs once when you press reset or power the board

void setup() {

  // initialize digital pin LED_BUILTIN as an output.

  pinMode(12, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

  digitalWrite(12, HIGH);  // turn the LED on (HIGH is the voltage level)

  delay(2000);                      // wait for a second

  digitalWrite(12, LOW);   // turn the LED off by making the voltage LOW

  delay(2000);                      // wait for a second

}

Output: