DIY】MIDI foot controller for Guitar 【Easy】 - YouTube
How to Make an Arduino MIDI Footswitch - YouTube
Amazon.com: MeloAudio Tone Shifter Mega MIDI Foot Controller and USB Guitar Recording Audio Interface for iPhone, iPad,Android Devices, Mac and PC : Musical Instruments
Finally, An Open Source MIDI Foot Controller | Hackaday
Meloaudio Midi Commander Guitar Portable Usb Midi Foot Controller With 10 Foot Switches 2 Expression Pedal Jacks 8 Host Presets - Guitar Parts & Accessories - AliExpress
MIDI modules for build in guitar effects
Gumtown's DIY Arduino midi note foot pedal
MIDI Grande - MIDI foot controller for guitar effects
Build your own MIDI controller. (I did!) - Effects - Basschat