It is a pretty common first project to use an Arduino (or similar) to blink an LED. Which, of course, brings taunts of: you could have used a 555! You can, of course, also use any sort of ...

As a perfect example, these LED “blinking eyes” were created by [Will Moser]. Using nothing more exotic than some bare LEDs, an Arduino ... cardboard box and cuts two holes in it to serve ...

Run Arduino. 2. Open the LED blink example sketch ... Note: The easiest way to find what port the board is using is by disconnecting your board, restarting the IDE, and re-opening the menu.