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 oscillator, ...

This is a very simple but useful project, strobe navigation lights for rc airplanes, or you can adjust the flashing time and ...

Flashing, spinning, and oddly blinking LED indicators have become the modern equivalent of red warning lights on a car dashboard. Rather than giving every potential problem and function on a ...