3.1 LED Blinking

Hardware Wiring

LED Blinking

Sketch

The code can be found at Examples_Arduino - geek-workshop - studynotes - _002_LED_Blinking - _002_LED_Blinking.ino.

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

  This example code is in the public domain.
 */

// Pin 9 has an LED connected on most Arduino boards.
// give it a name:
int led = 9;

// the setup routine runs once when you press reset:
void setup() {                
  // initialize the digital pin as an output.
  pinMode(led, 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(1000);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);               // wait for a second
}

Verify & Compile

In Arduino IDe, to compile the above codes, click Sketch->Verify/Compile; to upload the code onto Arduino board afterwards, click Sketch->Upload.