I am trying to analyze (with the arduino uno analog inputs) Vout from my non-inverting op amp setup.
Basically, when a force is applied to the FSR this will change Vout and I have some code to convert this into a force in my sketch.
See below for my schematic.
When reading the analog inputs, the values are not constant (when I view them on the serial monitor). When I apply a certain weight on to the FSR the analog read keeps jumping between 280 and about 310.
However, when I check Vout using my multi-meter it is constant at about 1.4 V.
Is there a reason why the analogRead is jumping around so much? Would any hardware changes help this?