When it comes to the basics for microcontroller beginners, it has to be "blinking an LED." Connect an LED to a GPIO and toggle it between HIGH and LOW. That's it. It's easy. Too easy. So, I decided to ...

It's LED blinking again today. Dodging the infrared LED wiring, I've attached just one red LED to the corner of the breadboard. It's a very simple circuit connected in series with a 220Ω resistor.