"Gerald Newton" <electrician@electrician2.com> wrote in message

news:1194303377.709916.179600@y27g2000pre.googlegroups.com...

On Nov 5, 12:27 pm, Lem <lem...@hotmail.com> wrote:

> Gordon wrote:

> > <j...@specsol.spam.sux.com> wrote in message

> >news:p4b405-rog.ln1@mail.specsol.com...

> >> Capacitors.

>

> > capacitors usually discharge when the current is switched off - their

> > main

> > job is to smooth current, not to store volts....

>

> True, but they don't discharge instantaneously. Ever hear about the

> "time constant" of an R-C circuit?

>

> T = R × C

> where:

> T = time constant in seconds

> R = resistance in ohms

> C = capacitance in farads

>

> The time constant is the time taken for the charging (or discharging)

> current (I) to fall to 1/e of its initial value (Io).

>

> After each time constant the current falls by 1/e (about 1/3). After 5

> time constants (5RC) the current has fallen to less than 1% of its

> initial value and we can reasonably say that the capacitor is fully

> (dis)charged, but in fact the capacitor takes for ever to (dis)charge

> fully!

>

> --

> Lem -- MS-MVP - Networking

>

> To the moon and back with 4KB of RAM and 72KB of

> ROM.http://en.wikipedia.org/wiki/Apollo_Guidance_Computerhttp://history.nasa.gov/afj/compessay.htm

 

Yes,To the moon and back with 4KB of RAM and 72KB of ROM.

So why can't some one harness nuclear fusion for our energy needs?

 

1) Don't need to, your energy needs are really your energy wants.

Mankind can survive without the inefficient use of energy and has

done for millions of years, as do all other species on this planet.

There is a huge difference between need and want.

 

2) The equations are wrong, the fools are fiddling with Einstein's

relativity and it doesn't work.

 

So why can't *you* harness nuclear fusion for *my* energy wants?

No it's not!

"HeyBub" <heybub@gmail.com> wrote in message

news:%23UB8l$$HIHA.4684@TK2MSFTNGP06.phx.gbl...

> Prisoner at War wrote:

>> Is there some such concept as "residual electricity"???

>>

>> There was a problem with a computer at work...it's a new Dell running

>> WinXP Pro...everything's fine, I go to lunch and come back to a blank

>> screen that won't wake up from power-save/sleep mode!! I do the

>> obvious and check connections, making sure they're secure and

>> whatnot. I turn off the computer and turn it back on a few times, to

>> no effect!

>>

>> Tech Support suspects some kind of a "power management" issue --

>> whatever that is -- and suggests that I leave the system off for a few

>> minutes, literally, to let things "clear"...whatever that means. Sure

>> enough, however: it works!

>>

>> So now I'm here asking, because Tech hasn't the time to puzzle over it

>> with me, WHAT HAPPENED??? And how come shutting off power for a few

>> seconds isn't comparable to leaving power off for a few

>> minutes????????????

>>

>

> You're going to get a lot of theory here, but the real answer is: The

> power supply's broke.

>

GREAT spoof!

" db ´¯`·.. ><)))º>` .. ." <databaseben.public.newsgroup.microsoft.com>

wrote in message news:u%23QYPAAIIHA.1184@TK2MSFTNGP04.phx.gbl...

> Well,

>

> when the pc is powered down

> it is important to wait for

> the disks inside the hard drive(s)

> to stop spinning before powering

> them up again. Usually 20 seconds

> is good waiting period before

> powering your pc up again.

>

> This helps prevents a surge

> and reduces the wear and tear

> on those tiny little motors.

>

> As for the residual electricity

> it depends on what kind of

> capacitors they are.

>

> They are designed with different

> specifications. Some hold large

> charges of electricity and some hold

> miniscule amounts. Some are designed

> to release their charges frequently

> while others are designed to hold

> them until something or someone

> grounds them.

>

> However the above on

> residual electricity is only

> a consideration when accessing

> the internals of pc.

>

> Electronics are not unlike

> light bulbs, in that they can

> handle being turned on and off

> frequently. However, the

> motors need time to

> slow down and stop before

> powering them again.

>

> --

>

> db ·´¯`·.¸. , . .·´¯`·..><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>¸.

>><)))º>·´¯`·.¸. , . .·´¯`·.. ><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>

>

>

> .

>

>

> "Prisoner at War" <prisoner_at_war@yahoo.com> wrote in message

> news:1194294217.473003.148980@y42g2000hsy.googlegroups.com...

>>

>> Is there some such concept as "residual electricity"???

>>

>> There was a problem with a computer at work...it's a new Dell running

>> WinXP Pro...everything's fine, I go to lunch and come back to a blank

>> screen that won't wake up from power-save/sleep mode!! I do the

>> obvious and check connections, making sure they're secure and

>> whatnot. I turn off the computer and turn it back on a few times, to

>> no effect!

>>

>> Tech Support suspects some kind of a "power management" issue --

>> whatever that is -- and suggests that I leave the system off for a few

>> minutes, literally, to let things "clear"...whatever that means. Sure

>> enough, however: it works!

>>

>> So now I'm here asking, because Tech hasn't the time to puzzle over it

>> with me, WHAT HAPPENED??? And how come shutting off power for a few

>> seconds isn't comparable to leaving power off for a few

>> minutes????????????

>>

>> TIA!

>>

>

Gordon wrote:

> <jimp@specsol.spam.sux.com> wrote in message

> news:p4b405-rog.ln1@mail.specsol.com...

>> Capacitors.

>>

>

>

> capacitors usually discharge when the current is switched off - their main

> job is to smooth current, not to store volts....

 

But it's not instantaneous, which can be seen easily by turning off your

computer, unplugging it from the wall/USP and pressing the computer's ON

switch. What you're doing is bleeding off the charge left behind by the

Instant On feature (keeps the mobo hot). This bleeds off pretty quickly

on its own.

 

IIRC I've seen big warning stickers on TVs/monitors warning of 1,000 of

volts if you go poking inside.

 

http://icrontic.com/forum/showthread.php?p=241556

Well,

 

when the pc is powered down

it is important to wait for

the disks inside the hard drive(s)

to stop spinning before powering

them up again. Usually 20 seconds

is good waiting period before

powering your pc up again.

 

This helps prevents a surge

and reduces the wear and tear

on those tiny little motors.

 

As for the residual electricity

it depends on what kind of

capacitors they are.

 

They are designed with different

specifications. Some hold large

charges of electricity and some hold

miniscule amounts. Some are designed

to release their charges frequently

while others are designed to hold

them until something or someone

grounds them.

 

However the above on

residual electricity is only

a consideration when accessing

the internals of pc.

 

Electronics are not unlike

light bulbs, in that they can

handle being turned on and off

frequently. However, the

motors need time to

slow down and stop before

powering them again.

 

--

 

db ·´¯`·.¸. , . .·´¯`·..><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>¸.

><)))º>·´¯`·.¸. , . .·´¯`·.. ><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>

 

 

..

 

 

"Prisoner at War" <prisoner_at_war@yahoo.com> wrote in message

news:1194294217.473003.148980@y42g2000hsy.googlegroups.com...

>

> Is there some such concept as "residual electricity"???

>

> There was a problem with a computer at work...it's a new Dell running

> WinXP Pro...everything's fine, I go to lunch and come back to a blank

> screen that won't wake up from power-save/sleep mode!! I do the

> obvious and check connections, making sure they're secure and

> whatnot. I turn off the computer and turn it back on a few times, to

> no effect!

>

> Tech Support suspects some kind of a "power management" issue --

> whatever that is -- and suggests that I leave the system off for a few

> minutes, literally, to let things "clear"...whatever that means. Sure

> enough, however: it works!

>

> So now I'm here asking, because Tech hasn't the time to puzzle over it

> with me, WHAT HAPPENED??? And how come shutting off power for a few

> seconds isn't comparable to leaving power off for a few

> minutes????????????

>

> TIA!

>

Residual Garbage

In article <1194294217.473003.148980@y42g2000hsy.googlegroups.com>,

prisoner_at_war@yahoo.com says...

>

> Is there some such concept as "residual electricity"???

>

> There was a problem with a computer at work...it's a new Dell running

> WinXP Pro...everything's fine, I go to lunch and come back to a blank

> screen that won't wake up from power-save/sleep mode!! I do the

> obvious and check connections, making sure they're secure and

> whatnot. I turn off the computer and turn it back on a few times, to

> no effect!

>

> Tech Support suspects some kind of a "power management" issue --

> whatever that is -- and suggests that I leave the system off for a few

> minutes, literally, to let things "clear"...whatever that means. Sure

> enough, however: it works!

>

> So now I'm here asking, because Tech hasn't the time to puzzle over it

> with me, WHAT HAPPENED??? And how come shutting off power for a few

> seconds isn't comparable to leaving power off for a few

> minutes????????????

 

The issue is with a cheap motherboard that doesn't properly recover from

Power Management settings.

 

Yes, capacitors have to be drained down over a couple minutes in some

cases, but they are not the symptom of the real problem - the real

problem is a crappy APM or motherboard.

 

--

 

Leythos

- Igitur qui desiderat pacem, praeparet bellum.

- Calling an illegal alien an "undocumented worker" is like calling a

drug dealer an "unlicensed pharmacist"

spam999free@rrohio.com (remove 999 for proper email address)

Another spoof!

"Leythos" <void@nowhere.lan> wrote in message

news:MPG.219972defd2b78cf9897d7@adfree.usenet.com...

> In article <1194294217.473003.148980@y42g2000hsy.googlegroups.com>,

> prisoner_at_war@yahoo.com says...

>>

>> Is there some such concept as "residual electricity"???

>>

>> There was a problem with a computer at work...it's a new Dell running

>> WinXP Pro...everything's fine, I go to lunch and come back to a blank

>> screen that won't wake up from power-save/sleep mode!! I do the

>> obvious and check connections, making sure they're secure and

>> whatnot. I turn off the computer and turn it back on a few times, to

>> no effect!

>>

>> Tech Support suspects some kind of a "power management" issue --

>> whatever that is -- and suggests that I leave the system off for a few

>> minutes, literally, to let things "clear"...whatever that means. Sure

>> enough, however: it works!

>>

>> So now I'm here asking, because Tech hasn't the time to puzzle over it

>> with me, WHAT HAPPENED??? And how come shutting off power for a few

>> seconds isn't comparable to leaving power off for a few

>> minutes????????????

>

> The issue is with a cheap motherboard that doesn't properly recover from

> Power Management settings.

>

> Yes, capacitors have to be drained down over a couple minutes in some

> cases, but they are not the symptom of the real problem - the real

> problem is a crappy APM or motherboard.

>

> --

>

> Leythos

> - Igitur qui desiderat pacem, praeparet bellum.

> - Calling an illegal alien an "undocumented worker" is like calling a

> drug dealer an "unlicensed pharmacist"

> spam999free@rrohio.com (remove 999 for proper email address)

Gordon wrote:

> <jimp@specsol.spam.sux.com> wrote in message

> news:p4b405-rog.ln1@mail.specsol.com...

>> Capacitors.

>>

>

>

> capacitors usually discharge when the current is switched off - their main

> job is to smooth current, not to store volts....

>

>

 

What utter crap.

 

John.

Gordon wrote:

> "Pegasus (MVP)" <I.can@fly.com> wrote in message

> news:eBvWUM$HIHA.4688@TK2MSFTNGP06.phx.gbl...

>> Capacitors don't store "volts" - they store "Coulombs".

>> Volt is a measure for "voltage" (or "electrical tension").

>> Coulomb is a measure for electrical charge. The main

>> purpose of a capacitor is not to smooth current but to

>> keep the voltage constant, regardless of the current

>> supplied or drawn.

>>

>

> I did Physics A level in 1973!

>

>

>

And failed by the sound of things.

 

John.

"John" <zen@zen.co.uk> wrote in message

news:5p9pm1Fpn9a7U1@mid.individual.net...

: Gordon wrote:

: > <jimp@specsol.spam.sux.com> wrote in message

: > news:p4b405-rog.ln1@mail.specsol.com...

: >> Capacitors.

: >>

: >

: >

: > capacitors usually discharge when the current is switched off - their

main

: > job is to smooth current, not to store volts....

: >

: >

:

: What utter crap.

:

: John.

 

Not only is it utter crap, the arrogant little prick gets bent out of

shape when you call him on it.

It was just before the end of the tech support guys shift and he wanted

enough time to escape from your call back if it didn't work!

 

Prisoner at War wrote:

>(snip)

>

>Tech Support suspects some kind of a "power management" issue --

>whatever that is -- and suggests that I leave the system off for a few

>minutes, literally, to let things "clear"...whatever that means. Sure

>enough, however: it works!

>

>So now I'm here asking, because Tech hasn't the time to puzzle over it

>with me, WHAT HAPPENED??? And how come shutting off power for a few

>seconds isn't comparable to leaving power off for a few

>minutes????????????

>

>TIA!

>

>

>

It was just before the end of the tech support guys shift and he wanted

enough time to escape from your call back if it didn't work!

 

--

Joe Leikhim K4SAT

"The RFI-EMI-GUY"©

 

"Treason doth never prosper: what's the reason?

For if it prosper, none dare call it treason."

 

"Follow The Money" ;-P

In article <IUNXi.292$TR5.139@nlpi061.nbdc.sbc.com>, unknown@unknown.kom

says...

> Another spoof!

 

Not at all, if the system won't come out of suspend properly, since it's

not a Windows issue, it's almost always the result of bad quality of the

motherboard / BIOS. Seen it hundreds of times, and that's one reason to

not buy cheap crap.

 

--

 

Leythos

- Igitur qui desiderat pacem, praeparet bellum.

- Calling an illegal alien an "undocumented worker" is like calling a

drug dealer an "unlicensed pharmacist"

spam999free@rrohio.com (remove 999 for proper email address)

On Nov 6, 10:50 am, "Androcles" <Engin...@hogwarts.physics> wrote:

> "Gordon" <gbpli...@gmail.com.invalid> wrote in message

>

> news:fgnuv5$o29$1@news.mixmin.net...: <j...@specsol.spam.sux.com> wrote in message

>

> :news:p4b405-rog.ln1@mail.specsol.com...

> : >

> : > Capacitors.

> : >

> :

> :

> : capacitors usually discharge when the current is switched off - their main

> : job is to smooth current, not to store volts....

>

> That shows how much you know -- which is zilch.

 

He's right. In a computer that's what they're for. Sure they can still

store charge without any current flowing, but that's not their

intended purpose. Many of them will automatically discharge straight

away into the heavy loads they're connected to. But in the power

supply are capacitors which do retain their charge after switching

off.

 

Not sure what this has to do with stopping the computer from working,

clearly there's an actual problem that should be fixed to prevent it

happening again.

No he's not. Capacitors do NOT smooth current. They reduce or eliminate

voltage fluctuations.

<nottoooily@hotmail.com> wrote in message

news:1194348071.624234.256100@i38g2000prf.googlegroups.com...

> On Nov 6, 10:50 am, "Androcles" <Engin...@hogwarts.physics> wrote:

>> "Gordon" <gbpli...@gmail.com.invalid> wrote in message

>>

>> news:fgnuv5$o29$1@news.mixmin.net...: <j...@specsol.spam.sux.com> wrote

>> in message

>>

>> :news:p4b405-rog.ln1@mail.specsol.com...

>> : >

>> : > Capacitors.

>> : >

>> :

>> :

>> : capacitors usually discharge when the current is switched off - their

>> main

>> : job is to smooth current, not to store volts....

>>

>> That shows how much you know -- which is zilch.

>

> He's right. In a computer that's what they're for. Sure they can still

> store charge without any current flowing, but that's not their

> intended purpose. Many of them will automatically discharge straight

> away into the heavy loads they're connected to. But in the power

> supply are capacitors which do retain their charge after switching

> off.

>

> Not sure what this has to do with stopping the computer from working,

> clearly there's an actual problem that should be fixed to prevent it

> happening again.

>

>

What spoof!

" db ´¯`·.. ><)))º>` .. ." <databaseben.public.newsgroup.microsoft.com>

wrote in message news:OXDF%23PAIIHA.3956@TK2MSFTNGP04.phx.gbl...

> Well,

>

> when the pc is powered down

> it is important to wait for

> the disks inside the hard drive(s)

> to stop spinning before powering

> them up again. Usually 20 seconds

> is good waiting period before

> powering your pc up again.

>

> This helps prevents a surge

> and reduces the wear and tear

> on those tiny little motors.

>

> As for the residual electricity

> it depends on what kind of

> capacitors they are.

>

> They are designed with different

> specifications. Some hold large

> charges of electricity and some hold

> miniscule amounts. Some are designed

> to release their charges frequently

> while others are designed to hold

> them until something or someone

> grounds them.

>

> However the above on

> residual electricity is only

> a consideration when accessing

> the internals of pc.

>

> Electronics are not unlike

> light bulbs, in that they can

> handle being turned on and off

> frequently. However, the

> motors need time to

> slow down and stop before

> powering them again.

>

> --

>

> db ·´¯`·.¸. , . .·´¯`·..><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>¸.

>><)))º>·´¯`·.¸. , . .·´¯`·.. ><)))º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><)))º>

>

>

> .

>

>

> "Prisoner at War" <prisoner_at_war@yahoo.com> wrote in message

> news:1194294217.473003.148980@y42g2000hsy.googlegroups.com...

>>

>> Is there some such concept as "residual electricity"???

>>

>> There was a problem with a computer at work...it's a new Dell running

>> WinXP Pro...everything's fine, I go to lunch and come back to a blank

>> screen that won't wake up from power-save/sleep mode!! I do the

>> obvious and check connections, making sure they're secure and

>> whatnot. I turn off the computer and turn it back on a few times, to

>> no effect!

>>

>> Tech Support suspects some kind of a "power management" issue --

>> whatever that is -- and suggests that I leave the system off for a few

>> minutes, literally, to let things "clear"...whatever that means. Sure

>> enough, however: it works!

>>

>> So now I'm here asking, because Tech hasn't the time to puzzle over it

>> with me, WHAT HAPPENED??? And how come shutting off power for a few

>> seconds isn't comparable to leaving power off for a few

>> minutes????????????

>>

>> TIA!

>>

>

Where have you seen it hundreds of times? Give facts not emotions.

"Leythos" <void@nowhere.lan> wrote in message

news:MPG.219a13bdbf80533f9897e2@adfree.usenet.com...

> In article <IUNXi.292$TR5.139@nlpi061.nbdc.sbc.com>, unknown@unknown.kom

> says...

>> Another spoof!

>

> Not at all, if the system won't come out of suspend properly, since it's

> not a Windows issue, it's almost always the result of bad quality of the

> motherboard / BIOS. Seen it hundreds of times, and that's one reason to

> not buy cheap crap.

>

> --

>

> Leythos

> - Igitur qui desiderat pacem, praeparet bellum.

> - Calling an illegal alien an "undocumented worker" is like calling a

> drug dealer an "unlicensed pharmacist"

> spam999free@rrohio.com (remove 999 for proper email address)

"Unknown" <unknown@unknown.kom> wrote:

>No he's not. Capacitors do NOT smooth current. They reduce or eliminate

>voltage fluctuations.

 

A power supply in any electronic gizmo changes 110V (usually) AC to

one or more voltages of DC, generally something like 5V - 20V, I

think.

 

Anyway, the voltage changing is done by a transformer. The

lower-voltage AC from the secondary coil of the transformer is then

fed to one (or sometimes more) rectifiers. That's a circuit component

that allows current to flow in only one direction. Now you have DC,

but very lumpy DC: it oscillates between no current at all and the

required voltage. Not much equipment can use the juice in that state.

So it needs to be "smoothed" (that is the term that's used). That is

accomplished by putting a capacitor - usually a pretty large

electrolytic capacitor - across the line. The capacitor stores charge

when the voltage goes up and releases it as the voltage drops, thereby

smoothing out the peaks and valleys.

 

--

Tim Slattery

MS MVP(Shell/User)

Slattery_T@bls.gov

http://members.cox.net/slatteryt

Even more amusing is dynamic RAM that uses the charge on

a capacitor to store bits.

http://en.wikipedia.org/wiki/Dynamic_random_access_memory

 

 

 

"Unknown" <unknown@unknown.kom> wrote in message

news:7q0Yi.18972$lD6.5552@newssvr27.news.prodigy.net...

: No he's not. Capacitors do NOT smooth current. They reduce or eliminate

: voltage fluctuations.

 

 

 

 

 

 

: <nottoooily@hotmail.com> wrote in message

: news:1194348071.624234.256100@i38g2000prf.googlegroups.com...

: > On Nov 6, 10:50 am, "Androcles" <Engin...@hogwarts.physics> wrote:

: >> "Gordon" <gbpli...@gmail.com.invalid> wrote in message

: >>

: >> news:fgnuv5$o29$1@news.mixmin.net...: <j...@specsol.spam.sux.com> wrote

: >> in message

: >>

: >> :news:p4b405-rog.ln1@mail.specsol.com...

: >> : >

: >> : > Capacitors.

: >> : >

: >> :

: >> :

: >> : capacitors usually discharge when the current is switched off - their

: >> main

: >> : job is to smooth current, not to store volts....

: >>

: >> That shows how much you know -- which is zilch.

: >

: > He's right. In a computer that's what they're for. Sure they can still

: > store charge without any current flowing, but that's not their

: > intended purpose. Many of them will automatically discharge straight

: > away into the heavy loads they're connected to. But in the power

: > supply are capacitors which do retain their charge after switching

: > off.

: >

: > Not sure what this has to do with stopping the computer from working,

: > clearly there's an actual problem that should be fixed to prevent it

: > happening again.

: >

: >

:

:

"Tim Slattery" <Slattery_T@bls.gov> wrote in message

news:9091j3thbldt9skjitm30jgd4i7njdsvnc@4ax.com...

: "Unknown" <unknown@unknown.kom> wrote:

:

: >No he's not. Capacitors do NOT smooth current. They reduce or eliminate

: >voltage fluctuations.

:

: A power supply in any electronic gizmo changes 110V (usually) AC to

: one or more voltages of DC, generally something like 5V - 20V, I

: think.

:

: Anyway, the voltage changing is done by a [snip transformer]

switching regulator.

http://www.national.com/appinfo/power/files/f5.pdf

Androcles wrote:

> "Gerald Newton" <electrician@electrician2.com> wrote in message

> news:1194303377.709916.179600@y27g2000pre.googlegroups.com...

> On Nov 5, 12:27 pm, Lem <lem...@hotmail.com> wrote:

>

>>Gordon wrote:

>>

>>><j...@specsol.spam.sux.com> wrote in message

>>>news:p4b405-rog.ln1@mail.specsol.com...

>>>

>>>>Capacitors.

>>

>>>capacitors usually discharge when the current is switched off - their

>>>main

>>>job is to smooth current, not to store volts....

>>

>>True, but they don't discharge instantaneously. Ever hear about the

>>"time constant" of an R-C circuit?

>>

>>T = R × C

>>where:

>>T = time constant in seconds

>>R = resistance in ohms

>>C = capacitance in farads

>>

>>The time constant is the time taken for the charging (or discharging)

>>current (I) to fall to 1/e of its initial value (Io).

>>

>>After each time constant the current falls by 1/e (about 1/3). After 5

>>time constants (5RC) the current has fallen to less than 1% of its

>>initial value and we can reasonably say that the capacitor is fully

>>(dis)charged, but in fact the capacitor takes for ever to (dis)charge

>>fully!

>>

>>--

>>Lem -- MS-MVP - Networking

>>

>>To the moon and back with 4KB of RAM and 72KB of

>>ROM.http://en.wikipedia.org/wiki/Apollo_Guidance_Computerhttp://history.nasa.gov/afj/compessay.htm

>

>

> Yes,To the moon and back with 4KB of RAM and 72KB of ROM.

> So why can't some one harness nuclear fusion for our energy needs?

>

> 1) Don't need to, your energy needs are really your energy wants.

> Mankind can survive without the inefficient use of energy and has

> done for millions of years, as do all other species on this planet.

> There is a huge difference between need and want.

>

> 2) The equations are wrong, the fools are fiddling with Einstein's

> relativity and it doesn't work.

>

> So why can't *you* harness nuclear fusion for *my* energy wants?

>

 

Humm, pretty much ALL of our current energy use comes originally from

"nuclear fusion".

"Bob I" <birelan@yahoo.com> wrote in message

news:uPFdf9JIIHA.5544@TK2MSFTNGP02.phx.gbl...

:

:

: Androcles wrote:

:

: > "Gerald Newton" <electrician@electrician2.com> wrote in message

: > news:1194303377.709916.179600@y27g2000pre.googlegroups.com...

: > On Nov 5, 12:27 pm, Lem <lem...@hotmail.com> wrote:

: >

: >>Gordon wrote:

: >>

: >>><j...@specsol.spam.sux.com> wrote in message

: >>>news:p4b405-rog.ln1@mail.specsol.com...

: >>>

: >>>>Capacitors.

: >>

: >>>capacitors usually discharge when the current is switched off - their

: >>>main

: >>>job is to smooth current, not to store volts....

: >>

: >>True, but they don't discharge instantaneously. Ever hear about the

: >>"time constant" of an R-C circuit?

: >>

: >>T = R × C

: >>where:

: >>T = time constant in seconds

: >>R = resistance in ohms

: >>C = capacitance in farads

: >>

: >>The time constant is the time taken for the charging (or discharging)

: >>current (I) to fall to 1/e of its initial value (Io).

: >>

: >>After each time constant the current falls by 1/e (about 1/3). After 5

: >>time constants (5RC) the current has fallen to less than 1% of its

: >>initial value and we can reasonably say that the capacitor is fully

: >>(dis)charged, but in fact the capacitor takes for ever to (dis)charge

: >>fully!

: >>

: >>--

: >>Lem -- MS-MVP - Networking

: >>

: >>To the moon and back with 4KB of RAM and 72KB of

:

>>ROM.http://en.wikipedia.org/wiki/Apollo_Guidance_Computerhttp://history.nasa.gov/afj/compessay.htm

: >

: >

: > Yes,To the moon and back with 4KB of RAM and 72KB of ROM.

: > So why can't some one harness nuclear fusion for our energy needs?

: >

: > 1) Don't need to, your energy needs are really your energy wants.

: > Mankind can survive without the inefficient use of energy and has

: > done for millions of years, as do all other species on this planet.

: > There is a huge difference between need and want.

: >

: > 2) The equations are wrong, the fools are fiddling with Einstein's

: > relativity and it doesn't work.

: >

: > So why can't *you* harness nuclear fusion for *my* energy wants?

: >

:

: Humm, pretty much ALL of our current energy use comes originally from

: "nuclear fusion".

Yep :-)

There is a easier way. Power down, unplug the power cord, then press

and hold down the ON button for a count of 8, then reconnect the power

cord, and power up again.

 

Pressing the On button assures that the capacitors are fully discharged.

 

 

Unknown, did transcribed the following::

> When you turn it off and leave it off for a few minutes, it allows the

> capacitors in the power supply to discharge.

> With the power supply caps discharged, you in effect are guaranteeing a good

> power on reset when you power on.

> "Prisoner at War" <prisoner_at_war@yahoo.com> wrote in message

> news:1194294217.473003.148980@y42g2000hsy.googlegroups.com...

>

>> Is there some such concept as "residual electricity"???

>>

>> There was a problem with a computer at work...it's a new Dell running

>> WinXP Pro...everything's fine, I go to lunch and come back to a blank

>> screen that won't wake up from power-save/sleep mode!! I do the

>> obvious and check connections, making sure they're secure and

>> whatnot. I turn off the computer and turn it back on a few times, to

>> no effect!

>>

>> Tech Support suspects some kind of a "power management" issue --

>> whatever that is -- and suggests that I leave the system off for a few

>> minutes, literally, to let things "clear"...whatever that means. Sure

>> enough, however: it works!

>>

>> So now I'm here asking, because Tech hasn't the time to puzzle over it

>> with me, WHAT HAPPENED??? And how come shutting off power for a few

>> seconds isn't comparable to leaving power off for a few

>> minutes????????????

>>

>> TIA!

>>

>>

>

>

>

Unknown wrote:

> No it's not!

 

 

Is too!

Power supply is fine!

"HeyBub" <heybub@gmail.com> wrote in message

news:uB1Pa$KIIHA.1168@TK2MSFTNGP02.phx.gbl...

> Unknown wrote:

>> No it's not!

>

>

> Is too!

>