[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.


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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