I have a pressure transducer sensor that outputs a voltage between 1445 mV and 1458 mV when a pressure is applied in my range of interest.
I don't have the option of using a different transducer, as this is part of an existing piece of equipment.
Using an Uno, external reference with 3.3 V applied to the AREF pin, the onboard 10 bit ADC is reading a range of about 6 different values (roughly 483 - 490).
Is there a way, without using an external ADC with more than 10 bits of resolution, to get more resolution in this narrow range of voltages?
Perhaps using an op amp to make a voltage subtractor to subtract 1400 mV and get my signal down to 45 - 58 mV range and then amplifying that 10x, so the ADC is working with a range of 450 - 580 mV? Is this insane?
Seems like there ought to be something I can do to zoom in on that narrow range of interest with the built-in 10 bit ADC.