I have a project in mind that would require me to sense when a specific guitar string was pressed onto a specific fret. I've played around with a few ideas, but I'm unsure about whether or not they are feasible.
One thought I had was to treat each string and fret as one half of a switch, whereby pressing a string to a fret would close the circuit. However, I'm concerned about the safety of touching what I think would be live wires. Is it possible to run a small enough current through the strings that would be safe to touch in this way?
Another area I explored was capacitive sensing. It's my understanding that making capacitive sensors out of each string should be able to detect when a string was touched. I supposed that the same could also be done with the frets, but a person's fingers don't always directly touch the frets themselves when fingering things on a guitar.
I'm waiting on a bunch of 1M and 10M resistors in the mail. In the meantime I'm without the proper components to test the capacitive method myself.
Given that a guitar fretboard is basically a matrix of conductors, I'm sure there has to be a good way to approach sensing the connections between the two layers of strings and frets.
Are either of the two methods I described feasible for this task? Or is there a better way I could go about trying to accomplish this?
I'm fairly new to working with electronics, so please forgive me if any of what I said screams ignorance.