[EEG] low budget EEG project

Kelly hurtstotouchfire at gmail.com
Tue Jul 13 16:26:10 PDT 2010


Andreas is around. Looks like Sunday afternoon works for us? I'll try
to drag Andreas. He lives across the street from me now.

-Kelly

On Tue, Jul 13, 2010 at 16:24, Tracy Jacobs <kinetical at comcast.net> wrote:
> Sunday afternoon works for me, I agree it would be good to set a time,
> because it has been varying a lot.  Is Andreas still here?
>
> Tracy
> On Jul 13, 2010, at 3:16 PM, Vicente Malave wrote:
>
>> Hi. I am interested in meeting up on Sunday too. I also do EEG for a
>> living, and I'm less interested in the hardware than in what happens
>> after you record some data.
>>
>> I'm also completely unconvinced (having been a user of both) that
>> active electrodes solve a useful problem. Far more important is taking
>> the time to make sure you attach the electrodes properly, obtain a
>> good electrical connection to the scalp to begin with, and control or
>> shield the ambient electromagnetic fields if you can.
>>
>> Vicente Malave
>>
>>
>>
>> On Tue, Jul 13, 2010 at 2:09 PM, Robert Picone <rpicone at gmail.com>
>> wrote:
>>> On Tue, Jul 13, 2010 at 1:28 PM, Maria Mouk <mariamouk at gmail.com>
>>> wrote:
>>>>
>>>> itd be my first visit to noisebridge
>>>> so i can be there on sun
>>>> just give me a time =D
>>>>
>>>> mm
>>>
>>> I'm probably going to be hopping in the first-visit boat with you
>>> in that
>>> case, as I'm rather interested in the topic and have been meaning
>>> to show up
>>> at NB for something one of these days anyway.
>>>
>>>>
>>>>>>>> On Tue, Jul 13, 2010 at 11:20 AM, Kelly <hurtstotouchfire at gmail.com
>>>>>>>> >
>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>> Given the charts in the first link, it should be possible. I'm
>>>>>>>>> skeptical of their gamma, but the <35Hz data is totally
>>>>>>>>> reasonable.
>>>>>>>>> I
>>>>>>>>> think that the big win is that it's a fully packaged device
>>>>>>>>> already,
>>>>>>>>> with bluetooth/wireless built in. A lot of the hassle with eeg
>>>>>>>>> comes
>>>>>>>>> in just tweaking little stuff to get good contact and shield
>>>>>>>>> from
>>>>>>>>> noise. Do you know if the Neurosky electrodes are active? I
>>>>>>>>> have
>>>>>>>>> trouble imagining they could get that data from passive
>>>>>>>>> electrodes.
>>>>>>>>> And if they're active, that's a pretty big win, because active
>>>>>>>>> electrodes are a little bit of a hassle to build. It would
>>>>>>>>> probably
>>>>>>>>> be
>>>>>>>>> worth trying to hack directly into the connection and get the
>>>>>>>>> raw
>>>>>>>>> data
>>>>>>>>> if they're active, because then we could harvest readymade
>>>>>>>>> active
>>>>>>>>> electrodes... That sounds nice.
>>>
>>> While for the Mindflex technically has Bluetooth-band wireless is
>>> built in,
>>> nobody has yet been able to get much use out of it because by
>>> default a
>>> significant portion of the useful data is filtered out before it is
>>> reached.
>>>  The $200 standalone model does have full serial over Bluetooth
>>> built in if
>>> that's what you mean.
>>> As for the electrodes, from what I've seen it would seem that they
>>> aren't
>>> active (though what I've seen isn't hugely informative on the
>>> subject), but
>>> the amplification/analysis of the system is entirety done inches
>>> away from
>>> them anyway, so you might get some of the advantages of an active
>>> electrode
>>> system.  If you were talking about the same data I'm thinking of,
>>> it seems
>>> that they may have also been using higher quality electrodes,
>>> distinct from
>>> the ones in their actual consumer products, as a proof-of-concept
>>> for their
>>> dry electrode system.
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>>>
>>>
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