Re: Openeeg-list Digest, Vol 101, Issue 1

Regarding an EEG system with Bluetooth, the OpenBCI system is an ADS1299-based EEG system and it uses a Bluetooth (LE) module to get the data to the PC.   http://openbci.com

They're open source so you can see how they did the connection.  Unfortunately, while they used to have the schematics linked on their site, they appear to have broken their links when they added the links to the software.  I sent them a message asking for the schematic links to be fixed...

Chip


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Message: 3
Date: Wed, 5 Nov 2014 13:52:19 -0600
From: wikitronic <[email protected]>
Subject: [Openeeg-list] bluetooth eeg
To: [email protected]
Message-ID:
	<CAHjkqSzej5cr6zFmvzFvF2qO3rPBsOM8BRv+T-O1=mNCJGK9cw@mail.gmail.com>
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Hi,
I have been tinkering with some components to make an open source bluetooth eeg.First question I have is:

 Are there any examples of a bluetooth eeg already built that include everything I need to build from components?

I have started playing with a design of my own. I want to use the dual channel fm frontend and connect it to a pic microcontroller and bluetooth serial module. My next questions have to do with the design of the device:

What adc sample rate is sufficient for eeg signals?

Would it be a good idea to use an automatic gain control circuit instead of a potentiometer?

thank you.


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