I was looking for a small MIDI foot controller to use with my Atomic AmpliFire which has only three foot switches.
Searching for a good solution I found a few Do-It-Yourself videos. One of them showcased a foot controller based on an Arduino Nano and this caught my attention. So I ordered an Arduino Nano and a few electronic components – switches, resistors, a DIN 5 jack, a DC power jack etc. and set up my first test environment.
Everything arrived and I started assembling the foot controller. These images show the circuit board from the bottom and the top side. The bridge rectifier is there to protect the Arduino Nano from being fried. This happened to my first one when I accidently used a second power supply with an inverted polarity. I use a socket for the Arduino Nano just in case I have to replace it someday.
I decided to build the cover from some acrylic glass and Mahogany wood.
I hope that this page helps you to design your own MIDI controller. If you find some errors or like to share your experience just contact me. These images show the original MIDI mule and a version I built into a pedal board..