(arduino / electronics newb warning)
So I've been checking out the QT113 for touch sensing http://www.instructables.com/id/DIY-Touch-Sensor/
unfortunately, it only outputs logic on/off, and for my project I was hoping for some voltage readings...
there's a good thread about setting up a little circuit to detect touch/proximity http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1171076259/0
but would this be the best way to do it? are there any IC's someone can recommend? i found these on digikey http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MPR084EJ-ND
but they're made for touchpads and look a little too complicated for my experience level.
simplified explanation of my project:
say you have a 1.5 foot by 2 foot piece of aluminum foil hooked up to your sensor/circuit. i want to generate sound (with the supercollider language, if you're curious) based on approximately where the foil is touched. i don't really care where someone is touching it, but if they rub from one end to the other, i want to try and use the difference in voltage to feed my music-maker some more info than just whether they're touching or not.
there might be some other issues - noise, or the difference between voltages being too small...i'm too inexperienced to tell what this would realistically be able to give me.
the other thread i mentioned above looks super simple too...do you think that just putting a resistor and wire+foil between two pins would do the job fine (i know...in the time it took to type this i could have just tried it :)) but i'm curious if there's something else for this purpose?
thanks a ton! sorry for my super long question! josh