I'm looking to conduct an amateur experiment to detect ELF magentic fields. A precedent experiment I'm looking to replicate discovered output of variable frequency 0.3Hz-30Hz, centred around 7-8Hz.
Output will be in voltage, I expect in the range +-5v, but I suppose this could be adjusted using an amplifier.
I'm looking at the ADC-20/24, but I heard that the maximum sampling rate is 17.7Hz, which makes for a maximum frequency of 8.8Hz... (is that correct?)
What would happen if the frequency of my output is lower, would the acquirer simply not be able to pick it up?
If the frequency does fall below the range, would the acquirer still be able to measure the magnitude of the output (which is more important for me) if not its exact frequency?
If not, do you have any equipment which would be more suitable for detecting output in the range?
Thanks for your help!