Interlink Electronics 4-Zone FSR Mouse Sensor - Manual (Page 4)

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2
4-Zone Mouse Sensor
Integration Guide
3.0 Theory of Operation
The most basic FSR consists of two membranes separated by a thin air gap. The air gap is
maintained by a spacer around the edges and by the rigidity of the two membranes. One of the
membranes has two sets fingers which are interdigitated and electrically distinct; each set
connects to one trace on the tail. The other membrane is coated with FSR ink. When the two
layers are pressed together, the FSR ink shorts the two traces together with a resistance that
depends on applied force.
Figure 1: Exploded view of a standard single-zone FSR