1b Interfacing Arduino with LED.md

Interfacing Arduino with LED

Aim

To create Arduino programs that blink both an internal LED and an external LED at regular intervals.

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Components Required

For External LED Blink:

• Arduino board (e.g., Arduino Uno)
• LED
• Resistor (220Ω - 1kΩ) (optional)
• Breadboard
• Jumper wires

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For Internal LED Blink:

• Arduino board with a built-in LED (e.g., Arduino Uno)

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Video Simulation

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Programs

1. Internal LED Blink

This program blinks the onboard LED on the Arduino board, which is usually connected to the LED_BUILTIN pin.

Code

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000); // Wait for 1 second
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000); // Wait for 1 second
}

2. External LED Blink

This program blinks the external LED connected to pin 13 on the Arduino board, which is usually connected to the LED_BUILTIN pin.

Code

// Define the LED pin
const int ledPin = 13; // Most Arduino boards have an onboard LED on pin 13

void setup() {
  // Set the LED pin as an output
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // Turn the LED on
  digitalWrite(ledPin, HIGH);
  delay(1000); // Wait for 1 second (1000 ms)
  
  // Turn the LED off
  digitalWrite(ledPin, LOW);
  delay(1000); // Wait for 1 second (1000 ms)
}

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Notes

• You can adjust the delay interval in the programs to modify the blink speed.
• Ensure proper connections to avoid damage to the LED or Arduino board.