Learn Microcontroller From beginning #Tutorial 1

Arduino IDE software link:

https://www.arduino.cc/en/Main/Software

Example program for blinking

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

void setup()

 {

  // initialize digital pin 13 as an output.

  pinMode(13, OUTPUT);

}

// the loop function runs over and over again forever

void loop() 

{

  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the voltage level)

  delay(1000);              // wait for a second

  digitalWrite(13, LOW);    // turn the LED off by making the voltage LOW

  delay(1000);              // wait for a second

}

Circuit Diagram

For connecting 3 LED's

Program:

void setup()
{
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
}
void loop()
{  
  digitalWrite(11, HIGH);
  digitalWrite(12, HIGH);
  digitalWrite(13, HIGH);
  delay(1000);                
  digitalWrite(11, LOW);
  digitalWrite(12, LOW);
  digitalWrite(13, LOW);
  delay(1000);            
} 

• In this connection they used 6 LED's there is 13 digital outputs are available so we can generate 13 different PWM pulses
• Watch this tutorial video