From: William S. <wil...@gm...> - 2011-06-28 20:15:16
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I'm finding the arduino won't read all pins at once, unfortunately, but it should still be fast enough. 16 mhz gives the opportunity to run each channel at 500 khz (and I believe I read that the average EEG wave is around 50hz, so 10000 samples per wave. You might actually need to slow it down!), and still have half the cycles left over for serial transmission to a pc. You could even program the serial to act like a modularEEG if you'd like. Signal filtering will probably still be an issue, but active electrodes should prevent the need for amplifiers. As for safety, are you really worried about a 5v 500mah current? On Tue, Jun 28, 2011 at 9:42 AM, Domain Admin <bi...@mo...> wrote: > I'm interested in building an arduino based EEG as well. I have some skills > and a Mega to experiment with! > +BG > > On Tue, Jun 28, 2011 at 12:23 AM, William Shipley <wil...@gm...>wrote: > >> An arduino mega has 16 analog input pins, capable of reading from 0v to >> either 3.3v or 5v, I don't remember which. However, it allows changing the >> Analog reference voltage (read: max voltage read) from an input voltage >> between 0v-5v from a pin. >> >> I believe there's an assembly-based way to make it read all the values at >> once, but as far as I can tell the IDE does not have support for it. Still >> reading into that. >> >> I was thinking: Active electrodes (~$20) + Arduino Mega (~$40-$65, >> depending) + some EEG software (Free) comes to a theoretical max of $85, >> quite a bit less than $400. Plus, it could do up to 16 Channels! just hook >> one electrode to ground, and the other to the analog input pin. Repeat for >> all placement locations. >> >> What do you think? >> >> >> ------------------------------------------------------------------------------ >> All of the data generated in your IT infrastructure is seriously valuable. >> Why? It contains a definitive record of application performance, security >> threats, fraudulent activity, and more. Splunk takes this data and makes >> sense of it. IT sense. And common sense. >> http://p.sf.net/sfu/splunk-d2d-c2 >> _______________________________________________ >> Openeeg-list mailing list >> Ope...@li... >> https://lists.sourceforge.net/lists/listinfo/openeeg-list >> Go to the above address to change your >> subscription options, e.g unsubscribe. >> >> > > > ------------------------------------------------------------------------------ > All of the data generated in your IT infrastructure is seriously valuable. > Why? It contains a definitive record of application performance, security > threats, fraudulent activity, and more. Splunk takes this data and makes > sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-d2d-c2 > _______________________________________________ > Openeeg-list mailing list > Ope...@li... > https://lists.sourceforge.net/lists/listinfo/openeeg-list > Go to the above address to change your > subscription options, e.g unsubscribe. > > |