The Arduino MIDI controller can be seen in action in the video below and full instructions have been published to the Imgur website which is accessible via the link below.

In need of a MIDI controller, Reddit user [Earthwin] built an Arduino powered one to control his Boss DD500 Looper pedal and the result is great looking.

After purchasing the Qu4tro electric skateboard and finding the controller wasn’t quite as good as the skateboard, Timo Brinschein decided to build his very own using a little Arduino hardware ...

New Arduino Esplora Provides A Ready-For-Gaming, Customizable, Open Source Video Game Controller Darrell Etherington 5:59 AM PST · December 10, 2012 ...

Electronics maker Adafruit Industries has developed its own Arduino-compatible boards, including one called the Flora--and a few craft projects to go with them.

YouTuber Alex Coover, aka Glacial Geyser, has build an awesome Arduino-powered MIDI controller to help with his budding music career. Here's a demo.

Modder TommyB has created a DIY Steam Controller 2 that splits into two, created using parts from the handheld gaming PC and a 3D printer.

That changed with the release of the Gameduino, a version of the open-source Arduino board pre-loaded with games, sprites, and inputs for various game controllers.