Hi! For a project, I am planning to use capacitive touch. Is it possible to get the x and y values from aluminum foil? Thanks!
I don't know any way to do it directly but what you can do is make a grid of contacts like described in this document:
then you scan the sensor pins and see where both a row sensor and column sensor are active, that's your location.
The example above uses the MPR121 chip but the technique can be adapted to others.