Is there a circuit whose output voltage is the square root of the input voltage? I think I might use with an analog summer and three AC pass filter caps on a 3-axis accelerometer to calculate the norm of the dynamic acceleration to calculate vibration, since the uC is going to be busy integrating other things.
EDIT: FOund an ugly 4-op amp one.
https://socrates.berkeley.edu/~phylabs/bsc/PSpice/OpAmps/OpAmps.html
Thinking about it some more, I probably could take more load off the processor by running the AC norm through the RMS converter on that webpage, since that is more useful for vibration measurement than the raw signal itself. Unless I'm mistaken, that would allow me to sample the signal more slowly than the raw signal istelf, and still get the peak vibration data needed since I need not capture the image the waveform...right? But...so ugly!
EDIT: FOund an ugly 4-op amp one.
https://socrates.berkeley.edu/~phylabs/bsc/PSpice/OpAmps/OpAmps.html
Thinking about it some more, I probably could take more load off the processor by running the AC norm through the RMS converter on that webpage, since that is more useful for vibration measurement than the raw signal itself. Unless I'm mistaken, that would allow me to sample the signal more slowly than the raw signal istelf, and still get the peak vibration data needed since I need not capture the image the waveform...right? But...so ugly!
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