Good lateral thinking but. having done extensive experimenting with the Touch command, I can say that it is only suited to carefully designed touch pads on the PCB. The sensitivity varies between touch inputs and also varies according to the amount of current passing though the associated port (A, B, C etc).... you could use the touch command, and you wouldn't have to use copper foil, or something else that would decrease the quality of the sound.
If you had a hammer that you didn't care about, you could cut away some of the cork end into a concave V. Then put your metal foil in there. Then when the string is hit, the V will center it on the strings.if both strings are not hit exactly simultaneously it will not Advance the lights.
Not necessarily. There is a magnetic method to detect string movement, but it would require considerable development to fit that instrument. I don't think Gramps is ready to develop a magnetic detector.That pretty much means sound detection with some kind of amplification and conditioning.
Ok, simplistically described only because I'm short on time these days, in my working life I spent a lot of time with creating magnetic fields and detecting changes in those fields in a very rough environment; the drilling industry.What did you have in mind? I enjoy building things I'm just a little limited on budget
Yes, it's far too expensive (for your application) and won't even do what you need (with or without hacking). It requires a high input impedance (>1M ohm) and has no amplification, whilst the PICaxe input probably needs an amplified signal with a low impedance (< 10k recommended).... it doesn't seem to be worth $200 but if it could be built for Less could probably be hacked to operate the pickaxe input.
I understand. If we intend to use audio feedback we need an amplified low impedance signal.even do what you need (with or without hacking). It requires a high input impedance (>1M ohm) and has no amplification, whilst the PICaxe input probably needs an amplified signal with a low impedance (< 10k recommended).