I'm currently building a lapsteel and intend to build a led "fretboard" for it. I'll be making it out of a piece of maple and intend to drill/mount the leds on the underside of the fretboard to illuminate the inlay dots.
I've got some other ideas that I'd like to try out at the same time re fretboard illumination. The fret board will be removable for servicing purposes, or for replacement with another style of fretboard if so desired.
A few years ago I built a midi organ foot pedal unit using a set of foot pedals from an old Hammond organ, I used it at the time to control Ableton Live on stage with my feet! But it can be used as a conventional one octave foot keyboard, (not sure what the right terminology is for these). Anyway, it was difficult to see the pedals clearly on stage for all the usual reasons, so I mounted 8 large ultra-bright leds in a row along the front panel for illumination. It then occurred to me that they could also double up as a little on stage light show, so I built a cct board up which enabled me to sequence the leds in preset patterns. Great fun and it looked great on stage, haven't used it now for a few years though.
So, there are a lot of different things you could do with an illuminated fret board other than just illumination. i.e. if you used led strips for fret markers, they could be programmed to illuminate the fret you should have your bar at when learning from tutorials. It could be midi sync'd so that it was in exact time to a backing track. If you wanted to go totally extreme, you could have 10 leds per fret on a 10 string guitar and illuminate individual strings that had to be played at a particular fret. Stick a led onto all your feet and knee levers and you're there
