Accurate adjustable resistor?
I need a simple, low cost, small device capable of 10 different resistance settings, and must be capable of mechanically reproducing them exactly, on command. It cannot be a potentiometer, as it is innacurate without some sort of measurement device (which I cannot use), nor a rotart switch or encoder (too big and expensive, cannot use digital). Basically, is there some alternative <$2 that will do this. Again, no digital stuff or measuring position, only going between several set resistance settings (but any incrament thereof is okay).