From: JimmyB_101 (jiva_at_humboldt1.com)
Date: 2001-12-30 17:56:19
My ongoing distraction of the group has been an effort to
come up with (concept)some sort of very low cost 2 channel unit
that folks who are interested in EEG feedback might be able to
"get their feet wet" with. The soundcard idea surfaced because
I've seen what the amateur radio group has done with them,
replacing $100-200 hardware units with software. No practical
solution has been proposed yet but I'm hoping once the current
modular_eeg design is complete that there might be some
interest in returning to a search for a very low cost
"hobby" unit.
> Let's stand back a bit and look at the total differential cost of
these two approaches:
>
> Approach 1, Modular_eeg
> 6 Channel A/D converter, microprocessor, rs232 isolation $15.00?
> I'm assuming battery power on eeg side and photo isolation for both
approaches.
> Total $15.
>
> Approach 2, multiple AM modulators feeding sound card line in's
> Assume you can drive 2 channels per sound card, although I'd be
concerned about many issues to get reasonable resolution.
>
Service.
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