Re: [Openeeg-list] Hello! Found you guys today!

[Andreas R. <and...@st...>]

Hi David (and everyone else who is new :o)

Jim Peters answered some of your software questions, so I'll have a go at the hardware ones.

Since you have a really nice daq-board, your next step is to buy or build the signal conditioner. We are still in the process of building and testing the first prototypes for EEG. (Actually, right now I'm just waiting for the PCB to arrive from the manufacturer...)

If you can solder, you can get yourself a piece of veroboard and some parts and build your own amplifier, for maybe $30 for two channels. I've attached a pdf with the schematics. (Does this list accept attachments? I guess we shall see...) It is not entirely tested for weak spots (offset handling etc) and you may want a low-pass filter, but just for testing it should be ok as it is.

Btw, I'm pretty certain you must put it in a metal box, and shield the electrode cables, or you will only see 50/60Hz hum rather than EEG. The work-report from Chris a few days ago, hints at that. I hope he has time to try some fixes, and report back to us how it went.

* The Awakened Mind is sold used (although the book I got looked brand-new) at Amazon. Just search for "C. Maxwell Cade". There are some technical details there, and some descriptions on what they did and how they did it (technology-augmented meditation that is). Hmm, it appears the price has gone up.

* Another book, "A Symphony in the Brain" by  Jim Robbins gives an introduction and some history and people of the field of clinical biofeedback.

* Some information about bioamplifiers (for electrical engineers...): http://www.biosemi.com/publications.htm It's a gold mine if you want to design amplifiers.

* A FAQ. Yes somewhere... Tim Nelson is the maintainer if I remember correctly... I don't have his mail address, so if you're listening Tim, it's time to post it here I think. :)

* Michal Wallace did an excellent job of going through the archives and summarized what he found. I hope it finds its way into the FAQ somehow (a large task!). http://groups.yahoo.com/group/buildcheapeeg/message/2872

* Dave Fisher is still working on some details he wants done, but I expect we will have an alpha-version of the software checked into CVS before long.

* Finally, these electrodes look pretty cheap ($18 for 100 pieces, AgCl on plastic), though I can't vouch for the quality or anything: http://www.electrodestore.com/EEG/EEG-p13.html (Jim, shipping to Europe is about $30 for a one-pound package - I asked them)

Well, thats it for now.

Regards,

Andreas