Op Amp Auto Gain with Arduino and a Digital Potentiometer 

Using the X9C series of digital potentiometer with Arduino, I adapted another project using an op amp where I was able to manually change the gain in software using push button controls.
Now I can choose a target gain threshold and have the system auto calibrate the gain until the input signal is amplified or attenuated to the desired level.
This can be useful for auto-calibrating a sensor interface to apply customized gain on various sensors without needing unique dedicated hardware for each one.
Sketch: github.com/GadgetReboot/Ardui...
Original X9C digital potentiometer op amp gain project:
• Manual Gain Setting Fo...
More on controlling the X9C digital potentiometer with Arduino:
• Digital Potentiometer ...
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