I am trying to read input values through a rheostat, which only has 2 leads but the values do not seem to be linear.
I connected it using the diagram at: http://ctheds.wordpress.com/2007/10/30/connecting-a-variable-resistor-to-the-arduino-analog-in/
Depending on the fixed resistor I use, the values change. I would like for it to read more linearly as if using a potentiometer with its three leads and was wondering if this is possible.
The rheostat is 20k ohm.
Thank you in advance for your help and input!