My Arduino Journey 02 - Learning the LED Blink with Arduino Uno

Learning the LED Blink with Arduino Uno

My first step in learning about Arduino Uno was experimenting with making an LED blink. There’s a technical detail worth noting here: the L LED soldered onto the board is connected to digital pin 13, which means in the code LED_BUILTIN is equivalent to pin 13.

What is the Purpose of the L Soldered LED?

The L LED serves multiple purposes:

  • Factory Testing: It allows manufacturers to quickly verify that the board is functioning correctly by checking if the LED blinks after uploading a simple blink sketch.
  • Convenience for Users: This LED also provides convenience for users as it can be used for basic tests or debugging without needing to connect any external LEDs. For instance, you can upload a blinking sketch and see if the LED blinks as expected, ensuring that your code and board are working properly.

This built-in feature simplifies initial testing and development, especially for beginners who might not have additional components at hand.

Thank you for reading. I hope this information will help others starting their journey with Arduino.

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