Hi Jim !


<color><param>7F00,0000,0000</param>> 

> I just joined this group and I am trying to figure out how I can help. I h=


</color>Nice :) We need a lot of help.


<color><param>7F00,0000,0000</param>> ave a working EEG design that I built many years ago. The last time I used=

> it was in 1996. I found the hardware and last night found the software fo=

> r the HC11 acquisition module and the waveform and FFT display for the PC. =

> I transmitted 9600 Baud to the RS232 serial port through a simple opto iso=

> lator. I transmitted 5 bytes at 120 Hz. The bottleneck at the time was th=

> e 386 PC. I had to restrict the waterfall display to 20 time slices becaus=

> e there was not enough time to handle the serial port, do the FFT, and disp=

> lay the VGA data.


</color>Sounds great.<FontFamily><param>Symbol</param>

<FontFamily><param>Arial</param> 

<color><param>7F00,0000,0000</param>> My comments about what I have seen in my brief time on this group are as fo=

> llows:

> 1) The infrared interface is an overkill (and not cheap), a simple opto is=

> olator and wires to the serial port works well.


</color>That's what the current modular design does. IrDA is just my 
personal idea how to make it even safer.<FontFamily><param>Symbol</param>


<color><param>7F00,0000,0000</param><FontFamily><param>Arial</param>> 2) An RF link would be nice improvement and I have seen that used.=20


</color>But I think _that_ would be overkill. A RF-Link at 115kbps is much 
more expensive then IrDA. <FontFamily><param>Symbol</param>


<color><param>7F00,0000,0000</param><FontFamily><param>Arial</param>> 3) I do not see that it is possible to build a usable EEG for $100 in parts=

> . The HC11 board alone is $100.00.


</color>That's why we use inexpensive microcontrollers with built-in ADC 
and serial interface which cost about 10$. I think it's no problem.<FontFamily><param>Symbol</param>


<color><param>7F00,0000,0000</param><FontFamily><param>Arial</param>> Please tell me what this group has completed so far in the design?=20=20

> How can I access the current design? What is SourceForge?

> What areas do you need help in?


</color>Software development for the PC, improvement of design

SourceForge is a place for developing open source sofware. We 
can use their services (including Webspace, CVS system, and 
much much more) for free to develop open source neurofeedback 
software. Look at openeeg.sourceforge.net<FontFamily><param>Symbol</param>



<FontFamily><param>Arial</param> Moritz



<nofill>
----------------------
Moritz von Buttlar
moritz@v...