[EEG] Fwd: electrodes

Josh Bailey josh at anarkiwi.com
Mon Dec 21 22:45:46 PST 2009


OK. That makes more sense. :)

Seems like a waste of plugs. Hard pressed to imagine why you want more 
than 1 plug/channel?

I should take a look at the thing next time. Sorry I was too busy 
congratulating myself over my hardware working and not helping. :( :/

On Mon, 21 Dec 2009, Tracy Jacobs wrote:

> 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)
> > 
> > _______________________________________________
> > 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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