DIY Switch-3 Pedal for TC Helicon Voicelive - YouTube
Amp channel switch. LED question
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beavis audio research
A special mini amp channel switcher/FX loop pedal (When you actually only use 1 of the 2 functions and the other is always on or off) Details in comments. : r/diypedals
DIY 2 button guitar amp footswitch for Epiphone Triggerman 60