I’m looking for some clarification for my project…
I’m using a couple FlexiForce FSR sensors and looking at the suggested MCP6004 amplifier in PDIP packaging ( http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf ) so it and the sensors can be incorporated on a breadboard.
I’ve read that an inverting opamp could help make the FSR’s non-linear output more linear. So, I’m thinking that if I want an output voltage (read by the Arduino analog pin) near the 5V supplied by the arduino under a max experiment load to the sensor, then I would incorporate a resistor with a value close to that of the FSR under the certain load?
For example, if a max of 1kg creates 80KΩ resistance in the sensor and I want an output near 5V under the 1kg load, then I would incorporate an 80KΩ resistor into the circuit with one of the opamps in the MCP6004 chip?
Am I assuming too much by using the simple equation Vout = -Vin * (Rresistor / Rsensor) ?