From: yaniv_vi (yaniv_vi_at_yahoo.com)
Date: 2001-12-14 11:40:34
hey doug
great of you to post all the pricing information . i think it's very
valuable .
can i ask a little request from you :
i believe all the info your checking now , is for self building .
but let's assume we want everybody to have the option to have such
device , at cheap . so we need somebody to assemble this babies :)
so could you please find what would be the cheapest way to get them
to public ?
thanks
yaniv
--- In buildcheapeeg_at_yahoogroups.com, Doug Sutherland <wearable_at_earthlink.net> wrote:
> Here's some more pricing information, comparing the price
> of amplifiers between the various designs. These are only
> the instrumentation and operational amp parts ...
>
> 1) The OpenEEG RS232EEG design
>
> 2 INA114P $6.82 $13.64
> 3 TLC272 $0.81 $2.43
> -----
> $16.07
>
> 2) The OpenEEG ModularEEG design
>
> 2 INA114P $6.82 $13.64
> 10 TLC277 $1.68 $16.80
> -----
> $30.44
>
> 3) The Biosemi low cost EEG spec (for 2-channels):
> (http://www.biosemi.com/publications/artikel7.htm)
>
> 2 TL062 $0.92 $1.84
> 3 LT1012 $5.00 $15.00
> 4 TLC1078 $4.37 $17.48
> -----
> $34.32
>
> 4) The Brainmaster freeware build specs
> (http://groups.yahoo.com/group/mind-l/message/17254)
>
> 2 AD620 $9.41 $18.82
> 4 OP90 $3.74 $14.96
> -----
> $33.78
>
> 5) The Circuit Cellar HAL-4
> (http://www.cc-concepts.com/products/hal4/hal4.pdf)
>
> 6 TL084 $1.20 $7.20
>
>
> All prices are single qty from Digikey, except the
> Brainmaster parts which are from Newark. I was a
> bit surprised to see that Atmel microcontrollers
> are cheaper than some of these amps ...
>
> -- Doug
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