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Topic: Logging 100 ksps with the Arduino internal ADC (Read 5394 times) previous topic - next topic

pito

#15
Aug 16, 2012, 11:55 pm Last Edit: Aug 17, 2012, 12:10 am by pito Reason: 1

When I made a multichannel digital delay line in 1985 (12 bit sampling

At that time we made FFT spectral analysers for 1/f noise measurements in semiconductors. It was a serious r&d so when people are connecting something to arduino and do FFT today is funny to see :) We spent months with decoupling, denoising, optimising our low noise preamplifiers, high order low pass filters, adconverters (at that time a discrete construction - DAC, successive aprox reg., S/H, comparator, etc) so we had a lot of control over it. We needed a lot of FFTs to make (and a lot of math, the spectra precision is related to sqrt(N), where N is number of FFTs done) for a single spectral plot - quite a time consuming exercise at that time :)

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