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polygraph and cardiograph to A/D
Posted: Tue Dec 10, 2002 3:35 pm
by 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?
Re: polygraph and cardiograph to A/D
Posted: Tue Dec 10, 2002 4:03 pm
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?
Re: polygraph and cardiograph to A/D
Posted: Tue Dec 10, 2002 4:40 pm
by Dimbulb
Re: polygraph and cardiograph to A/D
Posted: Wed Dec 11, 2002 8:38 am
by 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>
Re: polygraph and cardiograph to A/D
Posted: Wed Dec 11, 2002 10:21 am
by 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 !!!!
