the Arduino should see that as high,
as it's a sign wave. I would like to capture the wave with enough resolution to plot it graphically
Yes but you have to have a much more expensive rail to rail op amp. And then you need to protect he input of the op amp to prevent damage when the input goes negitave.
The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V (at 25°C). The upper end of the common-mode voltage range is V+ ? 1.5V (at 25°C), but either or both inputs can go to +32V without damage (+26V for LM2902), independent of the magnitude of V+.
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