One of the characteristics of an FSR is that its resistance does not change linearly with applied force. The resistance will tend to drop quickly at first, and then more slowly as most of the spaces within the FSR material become compressed. This can be advantageous if you want to cover a large range of force values, as it essentially compresses the range, but it also makes the circuit very sensitive to the initial light touches on the FSR. To compensate for this, and linearize the FSR output, the circuit in Figure 8 can be used. As with the voltage divider circuit, you can get either positive or negative voltage swings by tying the FSR to either the positive or negative voltage supply, and gain can also be used to increase the FSRs effective range.