Sometimes, the best DIY projects are about excess. Which is exactly what Reddit user smashcuts went for in his computer control panel that controls everything from music to app launching.
The control panel does all sorts of useful things alongside its ridiculous posturing. It can launch apps, control volume, change screen preferences, and more. It's built using a ton of switches and LEDs, powered by an Arduino and a bunch of USB controllers. As absurd and complex as it is, it's still surprisingly functional. You'll find a build guide over on Imgur and answers for some questions about how to do it over on Reddit.