Arduino (Teensy) USB MIDI foot controller for Katana amps
Best MIDI Foot Controllers for Guitar - Guitar Gear Finder
Build your own MIDI controller. (I did!) - Effects - Basschat
How to Make an Arduino MIDI Footswitch - YouTube
DIY MIDI Looper Controller Looks Fantastic! | Hackaday
Building a DIY Preset Switch for Meris Pedals — Derek L'Hirondelle
Arduino MIDI Note Monitor – Simple DIY Electronic Music Projects
A guitarist's guide to MIDI | Guitar.com | All Things Guitar
OMX-27 - a DIY Mechanical-Key Keyboard/Sequencer - Equipment - lines
MIDI Switcher: Set your MIDI free!! from Sixty Four Pixels on Tindie
Ripthorn's MLS-5: A MIDI Controllable Loop Switcher - freestompboxes.org
Module of MIDI switcher with 2 stereo loops for DYI
8 Channel Arduino MIDI Switch – jimkim.de
MIDI Muppet - Another DIY Arduino based 2 button MIDI controller for the Helix HX Stomp - Helix - Line 6 Community
A simple MIDI Keyboard Controller
Arduino Programable 5 Pedal Switcher - Instructables
MIDI-Controlled Loop Switcher | Scientific Guitarist
Gumtown's DIY Arduino midi note foot pedal
MIDI Pedal for Helix Stomp - DIY Arduino : r/Line6Helix
MP-100 MIDI Foot Controller - Harley Benton
PCB DIY Looper Loop Loopy Switcher Guitar Pedal MIDI (LP422) | eBay
8 Channel Arduino MIDI Switch – jimkim.de
