Arduino blinkajuća LED dioda bez korištenja delay() funkcije

/* Blink without Delay

Turns on and off a light emitting diode(LED) connected to a digital
pin, without using the delay() function. This means that other code
can run at the same time without being interrupted by the LED code.

The circuit:
 * LED attached from pin 13 to ground.
 * Note: on most Arduinos, there is already an LED on the board
that's attached to pin 13, so no hardware is needed for this example.
// Pin 13 na većini arduino pločica već ima spojenu diodu.
// Ako spajate svoju diodu na drugi pin, nemojte zaboraviti u seriju staviti otpornik, recimo 1K...

created 2005
by David A. Mellis
modified 8 Feb 2010
by Paul Stoffregen

This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/BlinkWithoutDelay
 */

// constants won't change. Used here to
// set pin numbers:
// dodijelite ime pinu na kojem je dioda radi lakšeg programiranja.
// const znači da se vrijednost varijable neće mijenjati
const int ledPin = 13; // the number of the LED pin

// Variables will change:
// Varijable koje će se mijenjati
int ledState = LOW; // ledState used to set the LED
// status LED diode
long previousMillis = 0; // will store last time LED was updated
// pamtit će vrijeme kada se stanje promjenilo

// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
// vrijednost intervala je u long varijabli (više na http://arduino.cc/en/Reference/Long)
// ovdje je stavljeno da je varijabla long iz razloga što milisekunde brzo prolaze pa nam int
// ne bi bio dovoljan
long interval = 1000; // interval at which to blink (milliseconds)
// the setup routine runs once when you press reset:
// setup funkcija se pokreće samo jednom kada se mikrokontroler pali ili kada se pritisne restart.

void setup() {
    // set the digital pin as output:
    // postavi pin 13 (ledPin) kao izlazni pin

    pinMode(ledPin, OUTPUT);
}

void loop() {
    // here is where you'd put code that needs to be running all the time.
    // ovdje stavite vaš kod koji se mora odvijati cijelo vrijeme

    // check to see if it's time to blink the LED; that is, if the
    // difference between the current time and last time you blinked
    // the LED is bigger than the interval at which you want to
    // blink the LED.

    //provjerimo je li vrijeme da upalimo LED diodu;
    //a to će se dogoditi ako je razlika između trenutnog vremena i vremena kada je dioda
    //zadnji puta upaljena, veća od intervala koji smo odredili.
    //interval smo upisali gore i trenutno nam je 1000.

    unsigned long currentMillis = millis();

    if (currentMillis - previousMillis & gt; interval) {
        // save the last time you blinked the LED
        // spremimo stanje kada smo zadnji puta upalili LED
        previousMillis = currentMillis;

        // if the LED is off turn it on and vice-versa:
        // ako je LED upaljena dodjeli stanje HIGH varijabli ledstate
        // ako je ugašena dodjeli joj status LOW

        if (ledState == LOW)
            ledState = HIGH;
        else
            ledState = LOW;

        // set the LED with the ledState of the variable:
        // upali ili ugasi LED, ovisno u stanju dodijeljenom gore
        digitalWrite(ledPin, ledState);
    }
}