Re: [Openeeg-list] entry-level EEG for the Arduino hobbyist?

[Cristian G. <cri...@fi...>]

Hi,

I develop some "bristle brush" sensors, in fact I call them "bristle 
sensors".

This is what I've published about those so far:
“Bristlesensors – Soft, Flexible Dry EEG Electrodes for Neurofeedback 
and BCI Applications”, C.Grozea and C.Voinescu, 4th BCI Meeting, 
Monterey USA 2010
“Bristlesensor – a new dry EEG sensor for neurofeedback and BCI 
applications”, C.Grozea, TOBI Workshop –Graz, 2010

Best regards,
Cristian Grozea



On 7/27/2010 4:48 AM, Joshua Shinavier wrote:
> Hi everyone,
>
> Thanks for all of the information on OpenEEG.  I'm interested in
> making use of OpenEEG for a project of mine.  However, the cost,
> learning curve and time required to build the actual ModularEEG are
> prohibitively high.  I wonder if you could gauge my chances of
> successfully prototyping a simple EEG device, on a breadboard, using
> Arduino or a similar platform.  I imagine that the barrier to entry is
> already about as low as it can be, but it doesn't hurt to ask, right?
>
> If ModularEEG can get a sufficient sampling rate out of the AT90S4433P
> chip, then one should be able to get the same out of the Atmel chips
> which come with any of the modern Arduino boards.  A Duemilanove
> running an Arduino sketch can easily handle a couple of analog samples
> at 256Hz, if it doesn't have too much else to do.  For this project,
> I'm likely to use the 80MHz PIC32 chip which comes with the UBW32
> development board [1], so perhaps that will allow some of the digital
> board to be pushed into software.
>
> I need to avoid custom PCBs, at least until I've had a chance to
> experiment with my device and decide whether it's worth investing more
> time and money in.  Unfortunately, that seems to rule out active
> electrodes.  I must admit that I have no experience with low voltage
> devices or alternating current and I'm just getting up to speed on
> electrical impedance.  For one thing, I don't quite understand why the
> circuitry in an active electrode needs to be physically close to the
> point of contact on the skin (despite Radek's helpful "theory" page).
> I guess the purpose is to keep it away from other electrodes and
> components which could interfere with the signal.
>
> If I were to go with active electrodes, I would be interested in
> trying out a soft "bristle brush" style of contact using bundles of
> electrically conductive fibers, as I'm interested in sleep states and
> the electrodes I see on the website look a little hard to sleep on.
>
> Thanks for any tips.
>
> Best regards,
>
> Josh
>
>
> [1] http://www.sparkfun.com/commerce/product_info.php?products_id=8971
>
>
>
>    


-- 
Dr. Cristian Grozea
Fraunhofer Institute FIRST
Kekulestrasse 7
Berlin 12489, Germany
tel: +49 30 6392 1893
mobile: +49 151 20040818