Re: Static discharge and the PowerBook

2004-01-14 Thread Paul Nicholson 
On Jan 10, 2004, at 8:37 PM, Harry D. Corsover wrote:

I don't get a continuous tingle, just a slight momentary one that 
tells me that I've just discharged some static electricity via the 
PowerBook. Once that happens, there's no further discharge or tingle. 
Having been used to the old clamshell iBook, the aluminum PowerBook is 
a new experience (in a variety of ways).

Yes, in that case it's likely just static charge you built up walking 
across the carpet.

I can only feel the leakage current when I use the computer with bare 
feet or sweaty socks on a ceramic tile floor and touch the edge of the 
computer where the paint has worn off. The anodization on the titanium 
shell is a good insulator, just like the anodization on your alBook. it 
will withstand the several tens of volts from power supply leakage, but 
not the thousands from static discharge.

Paul

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Re: Static discharge and the PowerBook

2004-01-10 Thread Harry D . Corsover 
On Jan 8, 2004, at 2:57 PM, Paul Nicholson wrote:

On Jan 8, 2004, at 9:16 AM, Harry D. Corsover wrote:

Well, despite my habit of touching an anti-static mat before touching 
my new 15" PowerBook, my arm sometimes grazes the edge of the PB 
before I reach the mat. I feel a very slight tingle, but haven't 
noticed anything that I can trace back to that.
If you are feeling a continuous tingle the problem is leakage current 
in the power supply. Because of capacitance that exists between the 
otherwise isolated  AC to DC line power supply, a small amount of the 
AC line voltage leaks into the DC output. In a desktop computer this 
current is conducted to ground by the ground wire on the AC cord, but 
on a laptop there is no ground wire.

When I go running and come home and use my powerbook at the kitchen 
table with my feet in sweaty socks on a ceramic tile floor, my body 
provides the path for this leakage current to get to ground. The left 
edge of my tiBook frame has lost its paint because of abrasion from my 
watch band. When skin brushes up against bare metal, a slight tingle 
can be felt.

Anodization is non-conductive, so an AlBook without scratches should 
not tingle your skin if your body is grounded.

Paul

Thanks, Paul.

I don't get a continuous tingle, just a slight momentary one that tells 
me that I've just discharged some static electricity via the PowerBook. 
Once that happens, there's no further discharge or tingle. Having been 
used to the old clamshell iBook, the aluminum PowerBook is a new 
experience (in a variety of ways).

Harry

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Re: Static discharge and the PowerBook

2004-01-08 Thread Paul Nicholson 
On Jan 8, 2004, at 9:16 AM, Harry D. Corsover wrote:

Well, despite my habit of touching an anti-static mat before touching 
my new 15" PowerBook, my arm sometimes grazes the edge of the PB 
before I reach the mat. I feel a very slight tingle, but haven't 
noticed anything that I can trace back to that.
If you are feeling a continuous tingle the problem is leakage current 
in the power supply. Because of capacitance that exists between the 
otherwise isolated  AC to DC line power supply, a small amount of the 
AC line voltage leaks into the DC output. In a desktop computer this 
current is conducted to ground by the ground wire on the AC cord, but 
on a laptop there is no ground wire.

When I go running and come home and use my powerbook at the kitchen 
table with my feet in sweaty socks on a ceramic tile floor, my body 
provides the path for this leakage current to get to ground. The left 
edge of my tiBook frame has lost its paint because of abrasion from my 
watch band. When skin brushes up against bare metal, a slight tingle 
can be felt.

Anodization is non-conductive, so an AlBook without scratches should 
not tingle your skin if your body is grounded.

Paul





Best to avoid any static discharge, though, since it can be quite 
intense.

Best Regards,

Harry Corsover

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Re: Static discharge and the PowerBook

2004-01-08 Thread Brian Lalor 
On Jan 8, 2004, at 12:00 PM, Mark Kippert wrote:

Anyhow, I'm planning to replace my iBook with a new 15" PowerBook. 
However I
was wondering about problems related to static electricity and the 
aluminum
body. Anybody know of, or experience issues, related to this?
I routinely zap my 12" PB.  I'm not proud of it, but it hasn't had any 
problems. :-)

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Re: Static discharge and the PowerBook

2004-01-08 Thread Tom Roth 
Use the simple, cheap steam type humidifiers.  They don't make the white dust and 
require only occasional cleaning and even that's pretty quick and easy.  They also can 
put out a lot of moisture in a short time which is what you need to avoid the static 
charge.

-tom


> --
> From: Harry D. Corsover
> Subject:  Re: Static discharge and the PowerBook
> 
> On Jan 8, 2004, at 11:18 AM, Kochkodin wrote:
> > Also...Have you looked into getting a room humidifier???  I had the 
> > same type of problem until I got a humidifier last year...The humidity 
> > in the house was about 10-15%...Way too low...By running the 
> > humidifier I got it up to the mid 30% range which seemed to eliminate 
> > the  problem...
> > HTH & Regards,
> > Mike K
> 
> I used to use humidifiers, and found (even with the best technology at 
> the time) that the combination of needing to clean them frequently and 
> thoroughly, and the fine white powder that wound up on lots of things, 
> that this "cure" was worse than the "disease." And, the old-style 
> humidifiers could easily breed mold spores and spread them throughout 
> the office or house.
> 
> The technology may have advanced since then, but I haven't looked 
> recently.
> 
> Best Regards,
> 
> Harry Corsover
> 
> 

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Re: Static discharge and the PowerBook

2004-01-08 Thread Harry D . Corsover 
On Jan 8, 2004, at 11:18 AM, Kochkodin wrote:

Also...Have you looked into getting a room humidifier???  I had the 
same type of problem until I got a humidifier last year...The humidity 
in the house was about 10-15%...Way too low...By running the 
humidifier I got it up to the mid 30% range which seemed to eliminate 
the  problem...
HTH & Regards,
Mike K
I used to use humidifiers, and found (even with the best technology at 
the time) that the combination of needing to clean them frequently and 
thoroughly, and the fine white powder that wound up on lots of things, 
that this "cure" was worse than the "disease." And, the old-style 
humidifiers could easily breed mold spores and spread them throughout 
the office or house.

The technology may have advanced since then, but I haven't looked 
recently.

Best Regards,

Harry Corsover

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Re: Static discharge and the PowerBook

2004-01-08 Thread Kochkodin 
Also...Have you looked into getting a room humidifier???  I had the same 
type of problem until I got a humidifier last year...The humidity in the 
house was about 10-15%...Way too low...By running the humidifier I got 
it up to the mid 30% range which seemed to eliminate the  problem...
HTH & Regards,
Mike K

Harry D. Corsover wrote:

On Jan 8, 2004, at 10:00 AM, Mark Kippert wrote:

For whatever reason, I seem to generate more static electricity than 
I would
consider normal. During the winter I spray my area with an anti-static
solution but the occasional zap still gets through. Heck, some days I 
wonder
if my demise will be the result of Spontaneous human Combustion!

Anyhow, I'm planning to replace my iBook with a new 15" PowerBook. 
However I
was wondering about problems related to static electricity and the 
aluminum
body. Anybody know of, or experience issues, related to this?

TIA
-Mark


Well, despite my habit of touching an anti-static mat before touching 
my new 15" PowerBook, my arm sometimes grazes the edge of the PB 
before I reach the mat. I feel a very slight tingle, but haven't 
noticed anything that I can trace back to that.

Best to avoid any static discharge, though, since it can be quite 
intense.

Best Regards,

Harry Corsover

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Amazing Travel * Health * Tax Benefits
   <http://www.hc.cyberwize.com>
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Re: Static discharge and the PowerBook

2004-01-08 Thread Harry D . Corsover 
On Jan 8, 2004, at 10:00 AM, Mark Kippert wrote:

For whatever reason, I seem to generate more static electricity than I 
would
consider normal. During the winter I spray my area with an anti-static
solution but the occasional zap still gets through. Heck, some days I 
wonder
if my demise will be the result of Spontaneous human Combustion!

Anyhow, I'm planning to replace my iBook with a new 15" PowerBook. 
However I
was wondering about problems related to static electricity and the 
aluminum
body. Anybody know of, or experience issues, related to this?

TIA
-Mark
Well, despite my habit of touching an anti-static mat before touching 
my new 15" PowerBook, my arm sometimes grazes the edge of the PB before 
I reach the mat. I feel a very slight tingle, but haven't noticed 
anything that I can trace back to that.

Best to avoid any static discharge, though, since it can be quite 
intense.

Best Regards,

Harry Corsover

===
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   <http://www.hc.cyberwize.com>
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Static discharge and the PowerBook

2004-01-08 Thread Mark Kippert 
For whatever reason, I seem to generate more static electricity than I would
consider normal. During the winter I spray my area with an anti-static
solution but the occasional zap still gets through. Heck, some days I wonder
if my demise will be the result of Spontaneous human Combustion!

Anyhow, I'm planning to replace my iBook with a new 15" PowerBook. However I
was wondering about problems related to static electricity and the aluminum
body. Anybody know of, or experience issues, related to this?

TIA 
-Mark


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Re: Static discharge

2003-02-24 Thread P. Turtle-Bear Guillermo 
On 2/21/2003 7:03 AM Thomas Ethen at [EMAIL PROTECTED] wrote:

>The weather here as been both cold and dry, which makes for a dangerous
>combination when using my computers, especially my laptop. I have been
>forced to make a static discharge block, which I keep by my computer which I
>use to discharge (it is amazing how large a spark will jump to the block)
>myself before using my Pismo. A spark that large could certainly do damage
>to many components inside a computer!
>
>A friend of mine has burned out three mice on her PC just this month because
>of static discharge.
>
>Tom

Get a humidifier. It will work wonders.

Turtle-Bear

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Re: Static discharge

2003-02-21 Thread Thomas Ethen 
The weather here as been both cold and dry, which makes for a dangerous
combination when using my computers, especially my laptop. I have been
forced to make a static discharge block, which I keep by my computer which I
use to discharge (it is amazing how large a spark will jump to the block)
myself before using my Pismo. A spark that large could certainly do damage
to many components inside a computer!

A friend of mine has burned out three mice on her PC just this month because
of static discharge.

Tom

I always de-staticize (sic) myself before
> plugging or unplugging stuff into the back of my Pismo. It is possible, I
> suppose that I could have permanently fried my sound board.


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