From: ldean_at_metrowerks.com
Date: 2001-12-04 19:18:50
Doug,
Under "design with a minimal number of parts" you link to
www.biosemi.com while next under "modeled after the Biosemi designs"
you link to www.biosemi.com/publications/artikel7... perhaps these
are reversed? You said before that Joerg's design is based on the
Biosemi design; can someone clue me in to which Biosemi design it is
based on?
Also, Jim's page states that his firmware supports a 0-60 Hz
frequency range, while your page states he acheived a band width of
0.1-100 Hz. Can you clarify this for me?
I priced the op-amps in the low part count design at digikey at about
$20 - $25 for one channel (resistors and capacitors not included).
The op-amps in the Brainmaster look like they would cost about $10,
but it's hard to tell because they are only sold from digikey in
units of 100 or more. Of course, I am also eager to see Jim's circuit
- especially if it can detect an extra 60 Hz of data over the Biosemi
design.
Laura
--- In buildcheapeeg_at_yahoogroups.com, Doug Sutherland <wearable_at_earthlink.net> wrote:
> I added some brief descriptions next to all of the EEG
> schematics on my site that make it easy to see how all
> of various circuits differ and what parts they use. I
> also added a schematic for an EEG that includes a tone
> generator and uses potentiometers to set thresholds.
>
> http://home.earthlink.net/~wearable/biopsy/#schematics-eeg
>
> -- Doug
>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> The human-computer interface seems to be stuck on the
> WIMP (windows, icons, menus, pointer) model. What I'd
> like is to have you call me and my clothing answers.
>
> http://home.earthlink.net/~wearable/jacket-wearable.html
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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