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, ...

I’ve seen a lot of Pixel LED projects and know every maker does things differently. I wanted to show you what I am doing for my Pixel LEDs. This post will give you an Arduino Pixel LED Controller ...