jremington:
Will my proposed design work to give independent readouts from each FSR without affecting each other?
Yes
You can replace a resistor with a potentiometer -- they are just resistors with a variable tap. Connect one end and the middle post and adjust the knob to the desired resistance.
I don't understand the last question. "Feedback loop" is not the correct term to use with this circuit.
Thank you for the response!
For the last question, I was under the impression that the circled area below was referred to a resistor feedback loop, I think the correct term might just be "Feedback resistor"
In an ideal world, I would have one potentiometer that could adjust the resistance in that section on all four FSR, allowing for the sensors to be set to max out at a value between 100lb and up to 1000lbs.
From the spec sheet:
"In order to measure forces above 100 lb
(up to 1000 lb), apply a lower drive
voltage (-0.5 V, -0.10 V, etc.) and reduce the
resistance of the feedback resistor (1k? min.)
Conversely, the sensitivity can be increased for
measurement of lower forces by increasing the
drive voltage or resistance of the feedback resistor."