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On Sun, 02 Sep 2007 15:02:00 +0100, Orchid XP v3 wrote:
> I was quite surprised that my PC uses 4 W even when it's "turned off"...
Does it support Wake on LAN? If so, then there's got to be some power
consumed to keep it awake enough to recognise a signal coming in saying
"wake up now".
Jim
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On Sun, 02 Sep 2007 14:27:08 +0200, scott wrote:
>> Probably, but I'm always reminded of the phrase "there ain't no such
>> thing as a free lunch" - when it comes to generating heat, physics
>> still applies. Doesn't mean things can't be more efficient than they
>> currently are, though.
>
> Problem with conventional cookers is they tend to heat up your kitchen
> too...
I'm with you on that....we've got an old Wedgewood stove (very nice
stove) with dual ovens, but our evaporative cooler blows the burners, so
we have to turn the cooler off while using the stove, or the flames dance
everywhere. That just makes it that much more difficult to cook in 100
degree+ temps.
Jim
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>> I was quite surprised that my PC uses 4 W even when it's "turned off"...
>
> Does it support Wake on LAN? If so, then there's got to be some power
> consumed to keep it awake enough to recognise a signal coming in saying
> "wake up now".
Yes, but 4 W!!!! 4 mW should be enough.
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> I just find it bizzare that this huge washing machine, spinning away to
> violently that it's deafening to stand near and you'd probably be injured
> if you touched it, uses about 5% of the power of a teeny little kettle.
> Far out!
And then you'd probably also be surprised how loud your speakers are when
you feed just 5 W into them.
> I'm currently measuring the fridge. Surprisingly, it uses a whole 100 W
> when the compressor is running. (I was expecting lower.) OTOH, it doesn't
> run for long...
> PS. 230 V? I thought it was 250 V...
IIRC the spec was changed from 240 +/- 10% to 230 +15% -5% (or something
equally stupid) to get us inline with Europe. Doesn't your meter tell you
the voltage too?
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On Sun, 02 Sep 2007 20:00:18 +0200, scott wrote:
>>> I was quite surprised that my PC uses 4 W even when it's "turned
>>> off"...
>>
>> Does it support Wake on LAN? If so, then there's got to be some power
>> consumed to keep it awake enough to recognise a signal coming in saying
>> "wake up now".
>
> Yes, but 4 W!!!! 4 mW should be enough.
Perhaps, depends on what other features the kit has, though.
I know, for example, that the system I have here at my feet has an ATX
board, which means the "power" switch is solid state rather than a
physical switch. That means the board is powered all the time (when the
power supply switch is on at the back of the system).
Jim
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>> I was quite surprised that my PC uses 4 W even when it's "turned off"...
>
> Does it support Wake on LAN? If so, then there's got to be some power
> consumed to keep it awake enough to recognise a signal coming in saying
> "wake up now".
It probably does support Wake on LAN. I really, *really* hope I have
that disabled though... (It's hard to tell!)
--
http://blog.orphi.me.uk/
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scott wrote:
>>> I was quite surprised that my PC uses 4 W even when it's "turned off"...
>>
>> Does it support Wake on LAN? If so, then there's got to be some power
>> consumed to keep it awake enough to recognise a signal coming in
>> saying "wake up now".
>
> Yes, but 4 W!!!! 4 mW should be enough.
I notice that, for example, the battery charger for my mouse continues
to charge even while the PC is "off". Also, the LEDs on my MIDI
interface still twinkle. And the USB light on my external audio card
still lights up. All of these things go out when I unplug the PC from
the mains. (Or just flip the switch on the PSU.)
Even so... that takes it up to, what, 19 mW? I don't know what the other
3,981 W is for...
(That's actually slightly unfair. The meter is only accurate to the
nearest 1 W, and I don't know what its rounding mode is...)
Convesly, the PC uses *less* power than I was expecting when turned on,
so...
--
http://blog.orphi.me.uk/
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>> I just find it bizzare that this huge washing machine, spinning away
>> to violently that it's deafening to stand near and you'd probably be
>> injured if you touched it, uses about 5% of the power of a teeny
>> little kettle. Far out!
>
> And then you'd probably also be surprised how loud your speakers are
> when you feed just 5 W into them.
Oh... no, not really. I mean, sound vibrations are really, *really*
tiny. (Think about it; even when the sound is turned up painfully loud,
the speaker cones move by such a tiny amount you can't even see them
move at all!)
AFAIK, the reason we have 200 W amplifiers and speakers isn't so much
because it takes that much electricity to move air around, but to reduce
RF pickup in the speaker wire... (Or rather, to reduce the
*signifigance* of such pickup.)
>> PS. 230 V? I thought it was 250 V...
>
> IIRC the spec was changed from 240 +/- 10% to 230 +15% -5% (or something
> equally stupid) to get us inline with Europe. Doesn't your meter tell
> you the voltage too?
The mater claims 249.98 V.
Also, 49.97 Hz. (So much for "they keep it to exactly 50 Hz to help all
those clocks that use it". The frequency waivers all over the place!)
--
http://blog.orphi.me.uk/
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>> I just find it bizzare that this huge washing machine, spinning away to
>> violently that it's deafening to stand near and you'd probably be injured
>> if you touched it, uses about 5% of the power of a teeny little kettle.
>> Far out!
> Did you measure your washing machine while it is warming water?
Yes. Then it goes up to about 25% of what the kettle uses. (Mind you,
the kettle *boils* the water, the washing machine merely makes it
slightly warm, and takes several minutes to do even that...)
--
http://blog.orphi.me.uk/
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>> I just find it bizzare that this huge washing machine, spinning away
>> to violently that it's deafening to stand near and you'd probably be
>> injured if you touched it, uses about 5% of the power of a teeny
>> little kettle. Far out!
>
> A. Didn't you say it uses 600W at final spin speed? That's 20% of 3000...
Your powers of mental arithmetic greatly exceed mine.
> B. It only seems bizarre because you already had decided on the way
> things are before learning even the first fact about them (ie. do an
> experiment like this, or study electrical theory). It's really cool to
> go "wow!" and be excited about new discoveries. But you are kinda
> saying that things you haven't seen should behave exactly as your head
> imagined it, rather than work the way it always has done, only waiting
> for you to come along and discover it. Actually, now I think of it, you
> do that rather too often, which is unfortunate because you limit
> yourself then... :'-s
I didn't say I don't believe it. I just said it seems really bizzare and
puzzling, that's all.
Gee, I wonder what our lawn mower uses...
--
http://blog.orphi.me.uk/
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