From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-01-18 08:01:00
--- In buildcheapeeg_at_yahoogroups.com, "Giovanni Moretti" <Giovanni_at_reflections.co.nz> wrote:
> Hi Guys & Gals
>
> Let me introduce myself - Giovanni Moretti from New Zealand -
> CompSci Lecturer with an electronics & microcontroller background.
> Interested in the same sort of oddball stuff I've seen go past on
> this list in the last two days. Nice to find some other technically
> competent loonies :-)
Hi Giovanni, welcome to the madhouse, mohahaha. :-)
> Next project is a uP controlled GSR Audio feedback unit - so it
> auto-zeros. My current one - (just op-amps and such) I have to keep
> twiddling the knob as I relax and the frequency falls ...
Cool. Feel free to post some schematics of the GSR input stage, or
perhaps send them directly to me, because this is a bit off-topic for
this list, but I'd like to see what a GSR-meter looks like.
>
> > Joel wrote:
> > It's hard to get started though, I have bought an experiment
> > board and some components to test stuff with but there is
> > much to learn before being able to do something useful. Any
> > advice you can offer a beginner in electronics..? :-) Books,
> > equipment, etc?
>
[Giovanni's good advice snipped]
I've got some advice for Joel too:
Is there a particular project you would like to do? Start out with
the idea, and then search for information based on what problems you
encounter. However, you can get far with a microcontroller and the
right pheripherals. :-) Dallas-semiconductor/Maxim has some nice
parts you can play with.
Look here:
http://dbserv.maxim-ic.com/1-Wire.cfm
Aside from books, look for application notes at the chip-
manufacturer's websites. Since you bought an Atmel starterkit, begin
with their home-page.
As for equipment, see if you can find and join a local electronics
club. If you live in a university town or a larger city, there's
bound to be one.
Back to Giovanni:
> One point that became obvious even from just playing with the unit
> I've been loaned is that - unless you're REALLY dedicated, most
> people aren't going to like getting vast amounts of goo in their
> hair (well I find if off-putting anyway :-) so the "market" (or no.
There are electrodes that use salt-water-in-a-sponge-electrodes
instead. Perhaps you could try those?
> Enough rambling from me - any thoughts on where to place each of the
> four EEG electrodes, and ELF magnetic entrainment frequencies - any
> thoughts?
Since you are into magnetic entrainment I guess you're after altered
states and such? Jim Meissner is really the one to answer you because
I have no practical experience (yet). Anyway, my suggestion is that
you begin playing around with alpha-waves, because they are easy to
generate (just close your eyes and relax). A good electrode placement
might be C3/P3 or C3/O1 for the left hemisphere and C4/P3 or C3/O2
for the right.
C3 and so on refers to locations on the head:
http://faculty.washington.edu/chudler/1020.html
About magnetic entrainment:
You should probably talk to Todd Murphy. He hangs at the Mind-l list,
also on Yahoo. You've probably heard of Shakti. If not, he can give
you all the details.
See ya,
Andreas
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