Re: [buildcheapeeg] Loose ends: Power

From: Dave (dfisher_at_pophost.com)
Date: 2002-02-21 18:17:09


On Thu, 14 Feb 2002 16:37:28 -0500, Jim Meissner wrote:

>I really like their electrodes because they are so simple and
>easy to maintain and cheap to make. I used the same set
>for over 10 years. Basically they take a regular button about
>1 inch diameter and attach a male snap to it. This snap is
>chrome or nickel plated and that gets corroded very quickly so
>after a few cleanings you are left with just brass. They have
>milled out a 5/8 inch circle that holds a foam sponge material
>that you saturate with conductive paste. It is this foam part
>that touches the skin. The male snap is the same size as
>a ( female ) 9 volt transistor battery clip.

How do these get secured to the head? Do you use a headband of some sort? I
am constantly looking for a better electrode solution, because I am not happy
with what I am using. Currently I have the standard cup electrodes that came
with the ProComp as well as a set of flextrodes (converted with an adapter
cable so that I can plug them into the ProComp), but am not really happy with
either. I long for the day of dry electrodes.

Before I got the flextrodes, I rigged some velcro straps to use with the
standard cup 'trodes, which worked ok, but apparently weakened the solder of a
couple of the electrodes due to stress from the velcro arrangement. That was a
costly mistake since these were the electrodes that specifically came with the
ProComp. I was hoping for something easier with the flextrodes, but so far
have found them about the same in terms of time for setup and clean-up.

Do you have a feel for how your arrangement compares to something like the
BrainMaster's flextrodes?

Dave.



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