Arduino program to Blink a Light Emitting Diode LED

Write a program using Arduino to Blink a Light Emitting Diode (LED). Also describe the connections used in a circuit with the Arduino Uno development board.

Components Needed:

• Arduino Uno
• LED
• Resistor (for LED current limiting)

Circuit Connections:

• Connect the cathode (shorter leg) of the LED to the digital pin 13 on the Arduino.
• Connect the anode (longer leg) of the LED to the ground (GND) on the Arduino.

void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
}
void loop()
{
  // turn the LED on (HIGH is the voltage level)
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000); // Wait for 1000 millisecond(s)
  // turn the LED off by making the voltage LOW
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000); // Wait for 1000 millisecond(s)
}