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Hi all, I want to build a front end that will interface to sensors plus be able to make differential measurements. Some examples are:
Resistive Photocell Flex, Force Sensors.
Potentiometers.
Analog Hall Effect Sensors.
Analog Temperature & Humidity Sensors.
Analog Range & Proximity & Depth Sensors.
Analog Gyros & Accelerometers.
To me this means I need a high impedance input, hence the two op-amps feeding into an ins_amp. There would be some instances where the “sensor” in question may need to source current, but I can work on that later I guess. For now reading the sensors listed above would be the start of a research project on accurate data acquisition, and my current research has led me to what I have posted .
Cheers
KV
BTW, PA0PBZ great cct idea thanks for the input.