Very easy to build with new customisable mech keyboard PCBs. Not tricky.
Problem is utility of tool is low. It's foot dexterity vs finger dexterity, not foot vs hand dexterity and foot dexterity is low and hard to improve. I was unable to derive sufficient utility over six months of continuous use. Would advise against.
Unlike guitar pedal, vim pedal expected to be frequently engaged.
Since the parent post was from an Emacs user: I have to disagree.
As an Emacs user, I've loved having a foot-pedal. The foot-pedal is superfluous in Vi because Vi is already modal; the foot-pedal is great in Emacs because it adds modality, kinda. Copying a post I made on Reddit a while ago:
> I found that my brain didn't want to treat the pedals like it did keys--it wanted to treat them modally. I wasn't pressing control, I was entering control-mode. I wasn't pressing shift, I was entering caps-mode. Which works out, because it isn't the quick keystrokes that cause the most strain, it's holding the modifier with one finger while the rest of the hand moves around. I wouldn't use the footpedal Control for the usual quick C-f/b/n/p, but it's great for holding Control as you C-s through a document.
Problem is utility of tool is low. It's foot dexterity vs finger dexterity, not foot vs hand dexterity and foot dexterity is low and hard to improve. I was unable to derive sufficient utility over six months of continuous use. Would advise against.
Unlike guitar pedal, vim pedal expected to be frequently engaged.