So I though to post in on the Electronic section of the forum but it's most like an project idea,
well what I want to try to build is a capacitive touch sensor, but i want to make it morel like a
matrix, is this possible to make a matrix capacitive touch sensor?
Like a led matrix but to get the input data from the matrix capacitive sensor so if i get close
or touch my finger i'll get the exact coordinates as input data.
D.60
Look around you, is there a phone or tablet ? There is your capacitive matrix.
It is hard to find information how it is made. I think they use an upper electrode and a lower electrode, and that in a matrix.
It is hard to find information how it is made. I think they use an upper electrode and a lower electrode, and that in a matrix.
Yes I know how they work but anyone tried building one with arduino?
edit:
Of curse there is some projects but i don't indent to build a simple 2d one but trying to figure out
to build a 3d one
D.60
There is even a Youtube video about it.
Added : O, now I understand, 3D capacitive. No, I have never heard of that before. How will you move your hand in the matrix with all the wires ? Without actually touching seems inpossible to me, all the other rows and columns influence it, so it needs a good touch. I think it will be very impractical. Perhaps a small 4x4x4 is possible, but with so much wires, it is not possible that something can move free inside the matrix.
Can you draw a picture ? Perhaps you are thinking of something new and you need to patent it 
Here are some link to it
This how other do it
http://processors.wiki.ti.com/index.php/MSP430_Low_Cost_PinOsc_Capacitive_Touch_Keypad
Touchless 3D Controller
Added : O, now I understand, 3D capacitive. No, I have never heard of that before. How will you move your hand in the matrix with all the wires ? Without actually touching seems inpossible to me, all the other rows and columns influence it, so it needs a good touch. I think it will be very impractical. Perhaps a small 4x4x4 is possible, but with so much wires, it is not possible that something can move free inside the matrix.
Can you draw a picture ? Perhaps you are thinking of something new and you need to patent it
Yes and No.
I'm thinking of a 3D but using 2D, a 2D matrix in 3D space, I'm not sure if you understand me,
take a paper and roll it around, we end up with a tube made out of a 2D matrix in 3D space, but
that's not the final form of my matrix this is just an example.
There is no point to patent it anyway everyone is stealing ideas or use the ideas for personal use.
BillHo
Yes I know and i read many things about capacitive touch sensors what I'm trying to build is looking something like this:
but this is just an example as i said.
D.60
To find the position of an object, you need to 'sense' far enough from the capacitive sensor.
I have seen the Touchless 3D Controller mentioned by BillHo before, and it uses those big flat surfaces. That makes it possible to work, but I doubt if it is accurate, and I think it needs to be calibrated often.
I guess it is not practial and that is why no one is using it.
Do you know the leap motion controller ?
Perhaps it uses radar ? I don't know.
Microsoft and Kinect use cameras for 3D positioning.
Instead of normal light, also IR light might be possible.
Long, long, long time ago, there was a helmet from an Italian manufacturer to play racing games. It uses IR leds and detects the rotation of the helmet and could also measure the distance to the computer. I don't know the year or the brand, but it was far ahead of every other 3D computer things.
I'm voting for "No", it is not possible. I can't see a way to make it work.
I've read this whole thread. I am extremely suportive of your project and I am certain that you can make it work.
You seem open to alternative ways to achieve the effect and we know from Leap Motion that it is possible to do "something". Also at a practical level hands are huge pieces of dense meat - tracking then can't be the hardest thing in the world, if you don't need high precision. For example if xrays were safe instead of unsafe and needing shielding, you would just take an image in two planes do simple processing (no occlusion problems) and be done. You're open to lots of solutions...
Can you talk a bit about the benefit or the usage that you envision? Why would you like to build this or how might a user use it? What's the benefit? How would the user know if it's working or not? It could just be "cool" like a theremin (google that, it's a musical electrical "instrument" played in 3D, without touching it) then it doesn't have to be so precise.
Can you talk about what yoy have in mind? Even if there is no "benefit", how do you envision it?
I support your project. You can do it.
Koepel
Leap Motion Controller looks more like a cam tracing the movement of the hand using OpenGL, I
worked in the past on few projects with camera and that's what it looks to me more like a cam but
not a "radar" US sensor or something like that.
As for the picture above I posted I'm trying to detect the position only from the outside of the 3D Matrix
Cap.Sensor not the inside, I will try to find a good tutorial/example how to build one in 2D and make
experiments. If anyone got already a good tutorial I'd like to see it.
curious48
Can you talk about what yoy have in mind? Even if there is no "benefit", how do you envision it?
Sadly I can't talk much about my project it's kinda OFFLINE mostly like a private project till the final release, I don't want people to steal ideas and use them against me, after final release everything
gonna be free source. I can talk only about what this topic is about.
D.60
Just a crazy idea: I don't think that capacitive sensor will give a good location, but a theremin does.
Ow what I remembered 
You can see one here:
Video at : 01:34
Those guys are amazing, i love their songs.
Sadly I can't use that on my project
D.60