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How to make the Arduino blink an LED


Inside Breadboard

Inside Breadboard

Connecting up wires and electronics to Arduino using breadboards.

Blinking two leds together

2 LEDs wired together

2 LEDs wired together

Blinking 2 LEDs independantly.

2LED separate arduino


int led = 13;
int led2 = 12;
int led3 = 11;

// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);

// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
delay(100);               // wait for a second
digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
{digitalWrite(led2, HIGH);
digitalWrite(led2, LOW);
{digitalWrite(led3, HIGH);
digitalWrite(led3, LOW);
delay(100);}// wait for a second