I am familiar with the Embletta. What I want is different. It goes along with this concept of mine.
www.z-eeg.com
I would want a box that piggy-backs on two leads presently used in polysomnography (C4 and M1) and the box would perform an FFT so as to yield the Z-ratio value, then the box would have 2 outputs (+ and - ) of
+1V so as to be able to plug back into the polygraph to record the Z-ratio value onto the polygraph during the study. This would yield a system independent way to use Z-ratio during polysomnography (PSG).
All manner of various ways to output the values should also be within the box, with miniusb connection to configure said box via computer. Also, said box can be run in multiple mode when multiple boxes are run simultaneously, and using a multi-port USB hub, the boxes would simultaneously calculate z-ratio from various EEG sites, and thru the computer a brain map of z-ratio would be availed in realtime.
I have the sleep chops, not the electrical chops. I was planning on getting an arduino board and starting from there, but I do not know the next step. Pre-amp, Amp, filter, FFT, how to make the circuit etc.