I FIGURED IT OUT!!!!!!

Yay!

Here's how:

Instead of having one alligator clip, I'll have two: one at each end of the line. Then I can take the average of these two values.

Think about it. With one clip, as I lift up, ? increases, arduino thinks I am touching farther away. With two clips, ? increases equally. So if I am in the middle, pressing down with the right amount of force (no idea how much force that is) I should get 512 or so on both sides. As I lift up, each side maybe increases too 600. then I do 1023-600 to get 423. the average of 423 and 600 is 511.5, so close enough.

For my touchpad, I'll just use 4 clips (one for each corner) and solve for 4 different triangles, taking the mean coordiantes.

Thanks for all the help!

baum