[Arduino] How to make LED blinking

[Arduino] How to make LED blinking



 

/*

  Blink

  Turns on an LED on for one second, then off for one second, repeatedly.

 

  This example code is in the public domain.

 */

 

// Pin 13 has an LED connected on most Arduino boards.



int timer = 50;           // The higher the number, the slower the timing.



// the setup routine runs once when you press reset:

void setup() {                





    for (int i = 2; i <= 11; i++) {

      // initialize the digital pin as an output.

      pinMode(i, OUTPUT);



  }

    

 

}



// the loop routine runs over and over again forever:

void loop() {

 

 

    for (int thisPin = 2; thisPin <= 11; thisPin++) {

    // turn the pin on:

    digitalWrite(thisPin, HIGH);  

    delay(timer);                  

    // turn the pin off:

    digitalWrite(thisPin, LOW);

  }

 

    for (int thisPin = 11; thisPin >= 2; thisPin--) {

    // turn the pin on:

    digitalWrite(thisPin, HIGH);  

    delay(timer);                  

    // turn the pin off:

    digitalWrite(thisPin, LOW);

  }

    

 

}



// Reference:

// 1. For Loop (aka The Knight Rider)