Make conductive rubber and use it to create a flexible touch sensitive robot skin. The resulting skin can be stretched across a frame or mounted on solid surfaces. It can also be mounted on curved surfaces or clothing.
It is touch sensitive and will produce an electrical signal no matter where you press on it.
Step 1: How It Works
Step 1 pic shows a 3d exploded illustration of the layers that make up the robot skin. It was made using 123d. Thumb pic shows the edge 0f the finished robot skin.
Ideally, this robot skin could be 3d printed. With a more intricate pattern, the feel and resiliency of human skin could probably be achieved. Unfortunately, 3d silicone printing is beyond the reach of my limited budget, and as far as I know, no one so far is 3d printing conductive rubber.
Oogoo II-A Conductive Rubber
You can make your own conductive rubber from silicone caulk, corn starch, solvent, and graphite powder. This creates a silicone rubber which can be made thin enough to paint on or thick enough to cast into molds.
Oogoo II can be cast into sheets and then laminated to create a layered robot skin that conducts electricity when under pressure. The layers are designed to conduct between two layers, no matter where you press on the surface of the skin.