From: ldean_at_metrowerks.com
Date: 2001-11-11 21:29:14
Joerg,
Thanks for the reply. Actually, the 68HC12 I have has 10 bit ADC, but
the BrainMaster serial protocol is only 8 bit. Do you know where I
can get the serial protocol for the ElectricGuru software? (Rob, are
you reading this?)
Do you have a timeframe for when the modularEEG schematics will be
released? My goal is to have something working by August 2002.
My background is as follows. I completed a BS in Electrical
Engineering in May 1999. I worked at Raytheon for 1 year writing
Space Station simulation software (ADA, UNIX host). For the last 1
year I have been working at Metrowerks; I've worked on device drivers
and system software (C and Visual C++, Windows host), embedded Linux
(C, Linux host), and am now writing perl scripts (Windows, Linux,
MacOS, and Solaris).
Laura
--- In buildcheapeeg_at_yahoogroups.com, "Joerg Hansmann" <info_at_jhansmann.de> wrote:
> Hi,
>
> ----- Original Message -----
> From: <ldean_at_metrowerks.com>
> To: <buildcheapeeg_at_yahoogroups.com>
> Sent: Saturday, November 03, 2001 10:42 PM
> Subject: [buildcheapeeg] Building an EEG
>
>
> ...
> > Has anyone else tried building a BrainMaster on a 68HC12?
>
> I have only seen the schematics and the serial protocol of the bm,
> but have not tried to build it. (old CPU, only 8 bit ADC, etc.)
>
> > Second, from scanning the postings to this group, it seems that
the
> > RS232EEG is preferred to the BrainMaster. Can you tell me what
makes
> > this design superior?
>
> the RS232EEG is obsolete now, because soon the modularEEG will
> be available that has even better properties than the RS232EEG.
>
> Some features of the modularEEG are:
> (new features of the modularEEG that enhance the RS232EEG concept
are
> marked with +)
>
> *all Schematics, Layouts, firmware etc. freely available under
GNU/GDL License
> *10 bit ADC resolution
> *256 Hz sample rate
> +*modular bus concept (minimum system consists of one digital-pcb
and one analog-pcb with 2 EEG channels)
> +*up to 6 EEG channels (with 3 analog-pcbs)
> *4 digital TTL-input channels
> +*driven right leg (DRL) technology for enhanced line-hum recjection
> +*5th order anti-alias low-pass filter (only in hi-end version)
> +*built in sweepable calibration generator
> *optically isolated RS232 Interface
> *AT90S4433 RISC CPU (from ATMEL)
> *firmware written in C (with AVR-GCC)
> *firmware flashable with freeware tool SP12 and a simple parallel-
port cable
>
> *protocol-compatible with Electric Guru EEG-feedback-software from
Rob Sacks
>
>
> > What would it cost to construct an EEG with
> > this design?
>
> About 600,--DM for a modularEEG with one digital and one analog pcb
> (2 EEG channels) without electrodes, completely assembled and tested
> in plastic cabinet.
>
> Components cost are about 200,--DM.
>
> At the moment a ready assembled version is not available partly due
to unresolved
> legal questions.
>
>
> > Thanks in advance for any help.
>
> HTH.
>
> > If my building an EEG can in any way
> > contribute to the group, please let me know. I may even be
interested
> > in writing software
>
> What languages ? C++ ?
>
> Regards,
>
> Joerg
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