There are two ways that you can power the stomp box:

1. USB micro B
2. 9V center negative guitar pedal power supply

After you choose your power method, plug in the box and then turn it on by pressing the power switch. You'll see the status LED turn on.

After powering up, plug in the MIDI jack to your favorite MIDI synth. The 12 foot switches give you an octave of notes to send. The two side buttons let you control the MIDI channel (first button) or the octave (second button).

Going Further

Since this build is housed in a pedal enclosure, its super customizable to your needs for the pedal. You could also change the code to use USB MIDI instead of MIDI over UART. If you aren't looking to have MIDI accompany or harmonize with you, you could also change the code to output Control Change or other utility messages.