Step 6: Testing the Robot Skin
The resulting robot skin has a resistance between 300 to 400 ohms when pressed with about 3 ounces of force anywhere on the surface. The top and bottom conductive layers are connected together to create a switch with the middle layer. The resistance is low enough that an led can be directly lit using five volts.
By varying the insulating dot spacing and thickness of the conductive rubber, the pressure of this touch sensor can be adjusted.