From: Doug Sutherland (wearable_at_earthlink.net)
Date: 2001-12-13 07:58:01
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
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:33 BST