Sensing touch using resistive graphs
David Marion Holman, Nicholas Fellion, Roel Vertegaal · 2014
In early design, instrumenting an object with touch sensing capability, especially one with complex surface geometry, can be problematic. In this paper, we show how resistive graph patterns--or resigraphs--can be used to quickly fabricate multi-touch sensors tailored to an object's shape. In very early ideation, resigraphs can be drawn using conductive ink. In later refinements they can be silk-screened or laser cut from off-the-shelf materials. A resigraph uses a commonly available microprocessor (e.g. Arduino), re-quires only three wires, and enables touch input on non-planar and non-developable surfaces.