I have a conductive elastic polymer which gives the resistance change of 800 Kohm with the input strain of 250%. and also gives linear response when the force is applied. I wanted to have a signal conditioning circuit which can measure the force range in the range of 0 to 45 gm. how can i start designing the signal conditioning.? Thank You.
You will likely need to use an instrumentation amplifier (TI, ADI, LT are all suppliers of such devices) and operate your polymer in a wheatstone bridge configuration with a stable excitation voltage. Here's a typical idea: -
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