I'm using this as the basis for my design:
http://www.arduino.cc/playground/Code/CapacitiveSensor
My question is, could I wrap that wire around the nail or screw shaft, solder them together, and then add 4 or 5 more to the box?
I'd like to be able to press more than one at a time, which this design says to leave the pins low if you want to touch more than one at a time.
Would I need anything else besides just the Arduino board? How many inputs would I be able to use with just the Arduino board?