I want to process an EEG signal with my Arduino, so I've been trying to use the FHT/FFT libraries. I need the frequency bins to be quite low (0 - 50Hz) so I can determine the strength of the ~10Hz component. The lowest possible frequency range I'm able to get is 0 - 4800Hz which gives a bin resolution of 37.5Hz. This is way too wide to isolate the 10Hz component.
Is there a way to perform a Fourier analysis at low frequencies (0 - 50Hz) using an Arduino?