[EEG] Fwd: electrodes

[Tracy Jacobs]

Sorry, I said Pedro's is 4 channels but it's only 2 channels!  Four  
electrodes, two channels, nine XRL plugs including the DRL.

Begin forwarded message:

> From: Tracy Jacobs <kinetical at comcast.net>
> Date: December 21, 2009 10:06:56 PM PST
> To: eeg at lists.noisebridge.net
> Subject: Re: [EEG] electrodes
>
> Well, when you look at Pedro's whole setup for 4 channels, he is using
> 8 xlr plugs plus one drl.
>
> The way Mitch wired up these two electrodes I have makes it seem like
> I can't wire them up to one xlr plug, but would need 2 for each
> electrode, because each electrode has 2 cables with wires going to
> different things.
>
> The passive elctrode diagram is much simpler, it looks like 2
> electrodes/one channel going to  one xlr plug with one cable per
> electrode?
>
> The wiring looks really  different to me...
>
> Tracy
> On Dec 21, 2009, at 9:55 PM, Josh Bailey wrote:
>
>>
>> Bit confused. The major difference between active/passive wiring is
>> with
>> active you of course have to ship the power up to the 'trode. I
>> don't see
>> any other major difference (i.e. I don't expect to see one)? What  
>> am I
>> missing?
>>
>> On Mon, 21 Dec 2009, Tracy Jacobs wrote:
>>
>>> Hello group,
>>>
>>> I was studying the instructions on the open EEG site for the case  
>>> and
>>> cabling again, and it looks like you hook up the cables a bit
>>> differently for the active elctrodes that I made :
>>>
>>> http://www.dcc.uchile.cl/~peortega/ae/
>>>
>>>
>>>
>>> than you might want to do for the cap or for passive electrodes.
>>>
>>> http://openeeg.sourceforge.net/doc/SimpleEEG/CaseCabling.html
>>>
>>> So, I'm not a little unsure  how to proceed with the wiring.
>>>
>>> I made 4 of the PEdro's active electrodes, boards and all, and it
>>> would be lovely to get them to work. But that's still only two
>>> channels,
>>>
>>> Mitch said to use his boards with mine for the 4 channel.  There is
>>> enough room for 8 channels in this box, at least, if we can find the
>>> boards.
>>>
>>>
>>> Tracy
>>> _______________________________________________
>>> EEG mailing list
>>> EEG at lists.noisebridge.net
>>> https://www.noisebridge.net/mailman/listinfo/eeg
>>>
>>>
>>
>> -- 
>> Josh Bailey (josh at anarkiwi.com)
>
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