polygraph and cardiograph to A/D

[Tommy volts]

I use the DRDAQ A/D converter with PC oscilloscope software to graph voltage traces etc on my PC. I would like to graph heartbeat and brain waves. Does anyone no a way to get brain waves and or heart beats into an electrical signal that I can plug into my DRDAQ?

[Chris Smith]

Long Coils of fine copper wire wound like a transformer over ferrite cores, and a clean op amp with gain of 100 or so should be able to read brain waves fairly well. <p>Heart beats can be physical, or electro mechanical, as well as the coil pick up method with lots of gain, to sense the weak electrical force involved in and around the area. <p>I am assuming your experimenting novice like?

[Dimbulb]

http://openeeg.sourceforge.net/doc/modu ... d-tips.txt
<http://home.att.net/~jnozum/EKGHappy.htm> <p>
16 page pdf from TI has an ECG typical app
http://www-s.ti.com/sc/ds/ina331.pdf

one person used LC made of toroid 10 mH .001uF for EEG ??

[Tommy volts]

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Chris Smith:
Long Coils of fine copper wire wound like a transformer over ferrite cores, and a clean op amp with gain of 100 or so should be able to read brain waves fairly well. <p>Heart beats can be physical, or electro mechanical, as well as the coil pick up method with lots of gain, to sense the weak electrical force involved in and around the area. <p>I am assuming your experimenting novice like?<hr></blockquote>

[Bernius1]

I WOULD THINK THAT THE EKG IS VOLTAGE MEASURED
DIRECTLY THRU THE SKIN, FROM 2+ PLACES INTO A
DIFF-AMP.
CHRIS.. THANKS FOR THE NOTORIETY..
IT'S " ..EXPERIMENTING NO_VICE STYLE...", USUALLY
FOLLOWED BY A BUZZING, OR POPPING SOUND !!!!