Re: [buildcheapeeg] Re: I published current design at SourceForge

From: Doug Sutherland (wearable_at_earthlink.net)
Date: 2001-12-01 10:02:47


Hi Andreas,

> Well, you know... researchers are trying to connect
> neurons to integrated circuits, so one of these days...

Yeah, they're growing them right on the chip!
http://www.its.caltech.edu/~pinelab/mike.html
http://pr.caltech.edu/media/lead/102797JP.html
http://guide.stanford.edu/Publications/dev4.html

> If we design a simulator first, then we wouldn't need
> the hardware. Here's a proposal: A program that allows
> the user to draw (using the mouse) a frequency curve,
> then transforms it into a FIR-filter by using the
> inverse fourier transform. Apply white noise to the
> FIR-filter and we have a simulated EEG-signal.

I'm all for simulators, but I'm really itching to play
with real data. Does one have to get a PCB board made
to try out the current HW, or would it be reasonable to
plunk those parts down on soldered breadboard material?
I do that with lots of other circuits, but they are not
nearly as sensitive to noise.

> http://www.biosemi.com/publications/artikel1.htm
> I've uploaded my attempt to reproduce them.

Cool, you've tried making them! I will check that out.
Can you share a bit on results: did you try feeding
them into a second stage amp and are you getting some
better results than passive electrodes? I assume that
you are doing ECG not EEG with those, is that right?

-- Doug

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The human-computer interface seems to be stuck on the
WIMP (windows, icons, menus, pointer) model. What I'd
like is to have you call me and my clothing answers.

http://home.earthlink.net/~wearable/jacket-wearable.html
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



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