Human Body Capacitance and Resistance

[Shaun]

That is what I said, dumbfuck.

No it's not. You talked about all sorts of variations.

 

[Archimedes' Lever]

If you had read my hole post you would have seen that I mentioned that right
after quote above. See below

The problem with your hole post is that it was as wholly insignificant
as this last post of your was.

 

[Archimedes' Lever]

I know you
don't have the brains to come up with that your self or even put together a
paragraph like that.

Yet more proof of your total retardation. The fact is, and it is
obvious... that you do not "know" a goddamned thing about a goddamned
thing.

 

[Shaun]

NOT voltage, idiot. CURRENT causes fibrillation.

You lose, again.

Voltage causes current to flow. If the resistance is high, it takes more
voltage to pass a dangerous level of current through the body. If the
resistance is low, it takes less voltage to pass a dangerous level of
current through the body. I agree current causes fibrillation. Again you
never read my hole post. LEARN to read Dimbulb!

You lose!

 

[Shaun]

I made HV medical device supplies. I know about what the limits are
and what the design constraints are.

Operating room defib paddles run at around 2mA during a cycle.

Grow the **** up.

The energy level of a defibrillator is measured in JOULES, a joule is
watt*seconds. A defibrillator (monophasic) starts at 1 joule and goes up
to 360 joules on most machines. In newer style defibs they are biphasic and
less energy is required to defibrillate a heart, they usually max out around
200 joules and are safer for the patient. The patient is assumed to be 50
ohms. The defibrillator circuit (monophasic) is a high voltage capacitor
that discharges through an inductor then connects to the paddles that are
placed onto the patients chest.

 

[[email protected]]

The problem with your hole post is that it was as wholly insignificant
as this last post of your was.

"hole post", ALwaysWrong?

 

[legg]

Do *NOT* bet on that combo as being unlikely..

I don't think that's the issue. It's a brainless attempt to cover all
bases with the fewest tests. 'Betting' would make just as much sense.

Rationally, you'd have to examine the effect of the range of
conditions, to see what actually had the most serious impact on
varying targets. There could, for example be a joule-second effect,
rather than simple breakover 'pinholes', that high voltages, greased
by local moisture, couldn't produce.

Being able to anticipate committee-think and to suggest it right off
the bat, however, is the sign of a real up and comer.

RL

 

[Archimedes' Lever]

More like a 'Post Hole'

It takes two total retards to see (or miss as is your case) that I was
correcting the mistake of the idiot.

 

[Archimedes' Lever]

"hole post", ALwaysWrong?

More proof that the Williams bitch is getting more senile as each day
passes.

Read HIS post, you pissy little bitch.

My post is a proper, humorous correction post.

Your post is retarded baby bullshit.

 

[Archimedes' Lever]

No it's not. You talked about all sorts of variations.

No, dumbfuck, I directly referenced the blood.

You lose... again... as usual.

 

[Archimedes' Lever]

Again you
never read my hole post. LEARN to read Dimbulb!

You are a goddamned idiot. Again you said "hole post".

It is WHOLE post, you retarded little bitch, and your stupidity in that
matter alone means that NOTHING you say has ANY credence
what-so-fucking-ever.

You dig, BOY? Now take your gang boy, raised wrong by both Daddy and
Mommy, obvious dumbfuck mentality and **** off and die!

 

[Archimedes' Lever]

The energy level of a defibrillator is measured in JOULES, a joule is
watt*seconds. A defibrillator (monophasic) starts at 1 joule and goes up
to 360 joules on most machines.

Not the unit that gets used in the operating room in an open heart
surgery procedure, you retarded ****.

 

[Archimedes' Lever]

Defibs run around 60 amps peak with pulse widths of a few
milliseconds. You are wrong by a factor of about 30,000:1, about
average for you.

No, you retarded, can't read worth a **** jacked brain idiot, those are
NOT the numbers for the defib used in an open heart surgery procedure,
which you'll note that I specified. The unit I specified delivers far
less energy. Not that a dumbfuck like you that cannot even use a
degreaser properly could understand the concept of differing models for
differing purposes.

You retarded little pussy boys should at least learn how to read before
you go putting your fucking foot in your mouths.

 

[Dirk Bruere at NeoPax]

Dirk Bruere at NeoPax wrote...


Right you are. As I clarified earlier, I was thinking of a
component postmortem.

Also, given the hypothesized rapid rise time, doesn't most of the
current flow on the surface ie skin - a literal "skin effect"?

 

[Dirk Bruere at NeoPax]

Except that he was referring to the chip. D'oh!

OK - I get it now!
I did that once with an expensive chip.
A guy passed it to me and, unthinking, as I went to take it there was a
big fat spark that leapt through its pins. Straight to the rubbish bin.

 

[Dirk Bruere at NeoPax]

30 KV per centimeter is the breakdown gradient of air. But that number
only correlates to spark gap length when the eectric field is even just
before breakdown.

In the usual case of people charging themselves up by shuffling their
shoes on carpet, they make sparks in gaps with uneven electric field. So,
less than 30 KV can make a 1 cm spark. If one end of the spark gap is a
sharp point or the tip of a wire maybe AWG 22 (approx. .63 mm) or smaller,
then a 1 cm spark can occur from about 11 KV, easily from 12KV.

Also, these sparks often appear bigger than they are. I find 1 cm to be
uncommon, but I find 8 mm fairly easy to achieve with favorable shoes and
a fairly favorable carpet and favorable humidity. So, I think 10 KV is
common but much more is not.

However, I remember experiencing one apartment with one exceptionally
favorable carpet and I somewhat remember making 15 mm, possibly 18 mm
sparks (corresponding to probably about 17 to possibly 20 KV).

The worst place I ever encountered was an electronics lab at university.
They had these plastic chairs and in winter just standing up from one
would generate 1cm sparks. They were quite painful as well, and no doubt
absolutely fatal to anything more sensitive than a vacuum tube.

 

[[email protected]]

More proof that the Williams bitch is getting more senile as each day
passes.

Read HIS post, you pissy little bitch.

My post is a proper, humorous correction post.

YOu're such a liar, AlwaysWrong.

Your post is retarded baby bullshit.

You should know bullshit, but you're AlwaysWrong.

 

[Archimedes' Lever]

Also, given the hypothesized rapid rise time, doesn't most of the
current flow on the surface ie skin - a literal "skin effect"?

No. Path of least resistance is the blood. Wires have 'skin effect'.
Body limbs do not.

Just ask the lady newscaster that had her arm literally burned off by
the current flow she experienced.

 

[Archimedes' Lever]

OK - I get it now!
I did that once with an expensive chip.
A guy passed it to me and, unthinking, as I went to take it there was a
big fat spark that leapt through its pins. Straight to the rubbish bin.

Even when they do not appear to have been damaged, the certainty that
they have is unquestioned. It doesn't take much energy to burn one of
those micron sized (or smaller) PN junctions and that is all that a chip
is made up from.

 

[Archimedes' Lever]

and no doubt
absolutely fatal to anything more sensitive than a vacuum tube.

I wish that everyone would attain that mindset for vulnerability.

You do not have to see sparks or feel charge movement to cause damage.
As little as a few volts differential can do it in some locations. Most
only need about 20V to get burned. So being charged to the point where
you can see the discharge is not required to kill chips,

One should ALWAYS ground one's self to the same tie point that the ESD
matting for the ESD safe workstation uses.

One should always ground one's self similarly whenever one approaches
an ESD safe workstation to reduce ANY charge one might have to as near
ground as possible. I have a habit of hitting ground before I touch
ANYTHING. It is all about balance. If I am at the same potential as the
mat and the chip sitting on it, the nothing can ever be transferred from
me to anything.