I would start with the Capacitive Sensing Library.
I can not see any application for a timer here, if your TLC555 is a different beast, please provide a link.
Your hope to get any usable x-position by your one sensor setup is too optimistic IMHO.
It exists; there's several different sizes available.
You can even go force-sensitive (no, not The Force) to measure pressure instead of position.
great!
But I am unfortunate because I can not use it.
the structure on which I have to work is non-linear, almost like a "S"
but very interesting..
Whandall:
I would start with the Capacitive Sensing Library.
I can not see any application for a timer here, if your TLC555 is a different beast, please provide a link.
Your hope to get any usable x-position by your one sensor setup is too optimistic IMHO.
TLC555 It is a component of this object:
the project when changing resistance changes the sound, I would do a variant.
I admit that I do not have perfect knowledge to easily understand the system
I tried the Capacitive Sensing Library, what I can do now is very similar to creating a button, but from here to be able to have a value on the X axis, I need to improve my knowledge.
some advice?
if I need anything is not an issue.. for now I prefer some simplification thanks to some hardware.
It is not for a scientific application.
then I am ready to find some inaccuracies of scale
Whandall:
With what resistance? BTW. the 'music system' does not use any spatial information.
reminding me that he had seen this object, I thought that under appropriate changes could do to my case
it has a sound change according to the distance between hand and pen.
Taking it all as input I can mathematically work with Arduino and calculate the distance.
(of course it is very approximated and varies with the surface)
But the resistance varies with pressure, moisture, calluses, etc.
How about a series of fingers on a PCB? Each one is connected separately. Placed apart so that your finger covers 3 of them at a time. Using capacitance to sense whether or not your finger is there, and placing it either at the trace with the most capacitance, or weighted to get in-between values.
That's how I do this kind of thing.
Note: you are NOT using resistance. There should be an insulating layer between your finger and the traces.
polymorph:
But the resistance varies with pressure, moisture, calluses, etc.
the effect varies person to person and from an infinity of events
but I would love to test this solution.. but first I have to full understand the system
polymorph:
How about a series of fingers on a PCB? Each one is connected separately. Placed apart so that your finger covers 3 of them at a time. Using capacitance to sense whether or not your finger is there, and placing it either at the trace with the most capacitance, or weighted to get in-between values.
thanks for the advice..
the surface to be covered is at least one meter .. too much work for the Finger
What kind of resolution? What do you mean "too much work for the Finger"? What kind of resolution? What is this for?
You can't just put your finger across two parallel strips of copper and "calculate the resistance". Your finger is a major part of the resistance, the copper nearly nothing at all. So even slight changes in finger contact resistance make this an impossible task.
Tell us what you are doing, how large it is, what kind of resolution and speed this requires.
