I have two terminals which I will measure resistivity between. I will be manually touching the terminal pair to different value resistors.
I don't want to be precise about where I touch the resistor (lining up the terminals with the resistor wires).
Is there some kind of "pad resistor" (the size of a small coin) in which I can just touch two terminals anywhere on the surface and have the same effect as if i were using set resistors?
Note: the reason I am using resistors is so I can have a series of pads with unique signature based on resistance over the terminals. If there is some other solution in which I can have unique "pads" be recognised by a microcontroller as different without using resistors, this will work also.