Article View: sci.electronics
Article #4007Re: power from phone line
From: Jeff Parke
Date: Fri, 08 Dec 1989 17:51
Date: Fri, 08 Dec 1989 17:51
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In article <5651@internal.Apple.COM> ems@Apple.COM (Mike Smith) writes:
>...
>Most lethal is a LOW current modest voltage signal that ocilates at
>a particularly sensitive frequency to the heart muscle. I've forgotten
>the frequency and if it was AC or pulsed DC.
It turns out that the most lethal frequencies for putting out your heart are
in the 40-100 Hz range. 60 Hz isn't a good one. Most deadly would be a
small (threshold) current, since larger currents can actually get the heart
going again - all depending on duration of contact and factors about the
subject heart's own susceptibility.
Early defibrillators (devices that deliver large current/voltage to start up a
fibrillating heart) actually used 60 Hz, but were not especially effective.
Modern, effective defibrillators are all DC; they deliver a 5 to 15 ms long
single monophasic or biphasic waveform.
--
...dataio!pilchuck!phred!jeffp {Jeff Parke}
Genie : JEFFP | DELPHI : JEFFPARKE | CIS : 71511,1512
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!mit-eddie!uw-beaver!uw-entropy!dataio!pilchuck!seahcx!phred!jeffpReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!mit-eddie!uw-beaver!uw-entropy!dataio!pilchuck!seahcx!phred!jeffp From: jeffp@phred.UUCP (Jeff Parke) Newsgroups: sci.electronics Subject: Re: power from phone line Message-ID: <2883@phred.UUCP> Date: 8 Dec 89 17:51:21 GMT References: <14230@jumbo.dec.com> <3542@kitty.UUCP> <6300@lindy.Stanford.EDU> <5651@internal.Apple.COM> Reply-To: jeffp@phred.UUCP (Jeff Parke) Organization: <5651@internal.Apple.COM>o Lines: 20