I think this is a very simple problem, but I really have no idea how to solve it. I'm building a custom DJ controller and so far everything works great, but I want to be able to use more than the 6 analog inputs that is given to me on my Duemilanove.
The full project will require at least 6 potentiometers, 4 buttons, and a slide potentiometer. Maybe I would use an IC? I'm not sure. -Thanks
Dig around for an analog mux.
On a mobile, a bit ... to write on.
One option is to use an Arduino that uses the TQFP varient of the ATmega. The chip itself has 2 more analog inputs, even though they may not be brought out to Arduino pins.
Otherwise, an Analog MUX like the CD74HC4067 might be interesting to check out.
SparkFun has a pretty inexpensive solution with a 16 to 1 mux breakout board for $5
This project of mine shows you how to expand the analogue inputs and have 8 inputs for every existing analogue input. It uses two chips to give 16 inputs.
http://www.thebox.myzen.co.uk/Hardware/MIDI_Footsteps.html