Has anyone used a resistor network as a voltage divider and then read the key value off one of the analog input pins?
I read a write up on something like this but it used resistors of odd values. ( Odd means I didn't have any )
The one I say was set up like a straight ladder and the input came off the mid-point. I thought that there might be a way to use 8-10 1K resistors in a network to accomplish the same thing.