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Phil Cook wrote:
> Succinctly put thank you. The whole thing is why hasn't the
> slot-together style reached down into the standard market, and if it did
> how would that affect 'normal' users' computer buying patterns. Instead
> of buying an entire new computer would they instead opt to upgrade the
> old one because it's a piece of cake to do.
Currently manufacturers assume that the only reason you could want to be
able to replace parts "easily" is because you need to do it fast, and if
you need to do it fast it must be because you have a "high availability"
setup. And if that's the case, the cost of downtime dwarfs any hardware
price you can come up with. These types of people will pay through the
nose to avoid downtime - and so that's what gets charged.
In fairness, it's much harder to design hardware this way. Current
hardware is "easy enough" that most people can manage it, and there's no
real large pressure for that to change.
> I mean seriously I've listened to friends talking about upgrading their
> entire computer to get more speed out of a game or something when all
> they need to do is switch the video card (or *to* a video card rather
> then the MB GPU). To them the computer is a lump like a television,
> opening the case doesn't occur to them and I don't think they'd be
> enthused by what they'd find if they did.
Heh. I bet the hardware guys would want to prevent that. ;-)
In fairness, if you want to replace the CPU, you will probably end up
having to replace virtually the entire PC anyway.
(You'll almost certainly need a new motherboard and new RAM. And
replacing a motherboard is currently *hard*. So many things to
disconnect and reconnect. I especially enjoy playing with the header
pins for the front plate...)
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Stephen wrote:
>
> Caps should be shorted out before working. Use a resistor or a bucket of water
> :)
> Drat I can't remember if I lie or tell the truth :)
>
Yes. A resistor works. Extra fun shorting it with a screwdriver. Causes
the whole "holy crap! I just vaporized the end of my screwdriver"
reaction, though. Actually, don't try that one at home... It stresses
the capacitor, and could irreparably damage it.
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Mike Raiford wrote:
> Yes. A resistor works. Extra fun shorting it with a screwdriver. Causes
> the whole "holy crap! I just vaporized the end of my screwdriver"
> reaction, though. Actually, don't try that one at home... It stresses
> the capacitor, and could irreparably damage it.
I'm sorry, it stresses *the capacitor*?? o_O
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Invisible wrote:
>
> I'm sorry, it stresses *the capacitor*?? o_O
>
Yep. And any domestic animals, or small children in the vicinity.
Seriously, though, most capacitors don't do well when discharging all of
their energy inside of a microsecond.
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> I especially enjoy playing with the header pins for the front plate...)
Yeh, you'd think they would have come up with a standard multi-pin
plug/socket standard for that by now...
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On Wed, 06 Feb 2008 06:28:53 -0600, Mike Raiford <mra### [at] hotmail com> wrote:
>Stephen wrote:
>
>>
>> Caps should be shorted out before working. Use a resistor or a bucket of water
>> :)
>> Drat I can't remember if I lie or tell the truth :)
>>
>
>Yes. A resistor works. Extra fun shorting it with a screwdriver. Causes
>the whole "holy crap! I just vaporized the end of my screwdriver"
>reaction, though. Actually, don't try that one at home... It stresses
>the capacitor, and could irreparably damage it.
He, he! I remember once shorting out a tuning capacitor on a CVT. There was only
about a quarter of a volt across the terminals. The spark threw the screwdriver
across the room and took a chunk out of it. Mind you the capacitor was 0.1 of a
farad. Gulp! Lesson learned :)
Regards
Stephen
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scott wrote:
>> I especially enjoy playing with the header pins for the front plate...)
>
> Yeh, you'd think they would have come up with a standard multi-pin
> plug/socket standard for that by now...
It's better than that.
My dad can't plug in the HD light. Because on the case it's a 3-pin
block with the middle pin not connected. But on the motherboard it's two
adjacent pins...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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>> I'm sorry, it stresses *the capacitor*?? o_O
>
> Yep. And any domestic animals, or small children in the vicinity.
> Seriously, though, most capacitors don't do well when discharging all of
> their energy inside of a microsecond.
Hmm. I thought that was the design goal of a capacitor?
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Stephen wrote:
> He, he! I remember once shorting out a tuning capacitor on a CVT. There was only
> about a quarter of a volt across the terminals. The spark threw the screwdriver
> across the room and took a chunk out of it.
Are you sure it wasn't you who threw the screwdriver across the room?
;-) I know I would have!
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Invisible wrote:
>
> Hmm. I thought that was the design goal of a capacitor?
>
In the case of the capacitor storing the energy for a flash, flash
discharges are actually rather finely timed. Something to the effect of
1 millisecond for a full-power flash, this discharges the capacitor
quickly, but not instantly. Lower power strobes only allow a partial
discharge at the same rate, which is why recycle time is much quicker
when using a flash at a lower power, because the cap isn't empty.
Shorting a capacitor without a resistor allows high amounts of current
to flow, which can cause an arc across the dielectric, thus destroying
the capacitor. At least that's how I understand it.
In other applications, discharge is much slower, such as when they are
used to smooth ripple current from a DC power supply.
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