AT/ATX PS question
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Posted by Floyd L. Davidson on July 11, 2005, 11:54 am
Please log in for more thread options >> >> With an ATX supply, no such AC cord exists, and instead the
>> >> green wire on the connector (routed through pins on the >> >> motherboard) is switched to ground by the front panel ON/OFF >> >> switch, and that causes the AC to be remotely switched inside >> >> the power supply. >> > >> >Not quite accurate. >>
>> You've just repeated the same thing I said with more (and >> unnecessary) detail. How is it not accurate? >
>You stated that the green wire is switched to ground by the front >panel switch. It is not. It *is*. (Please read what people *say*, not what you want them to have said.) >It is switched to ground by the OUTPUT
>of a logic circuit. The front panel switch toggles the INPUT of >the logic circuit. The front panel switch is what causes it to be switched. I said *nothing* to indicate that the physical circuit itself was switched *through* the front panel switch. You are reading too much into a one sentence statement of the effect. >> >Beside, the OP said he was going to use the RESET switch for his
>> >on/off switch. That will work just fine. >>
>> It will work. Of course then he doesn't have a RESET switch, >
>And a reset switch is used oh so often in an ATX computer. I've got one case that came without one. Talk about *annoying*! I had to add one. >> only an ON/OFF switch that is mislabeled, and an ON/OFF switch
>> that is labeled but doesn't work... which is a nice recipe for >> confusion. >
>For those who are easily confused. I was under the impression >that the OP would be operating this system. I think he would >get through the confusion. The original post did not make that clear at all. Certainly he has since clarified that it is a short term use, where that isn't terribly important. But cute little hacks that only the perpetrator knows about, aren't conducive to great group dynamics... >BTW, a little simple surgery will turn a AT type ON/OFF switch
>into a momentary ATX type ON/OFF switch. The OP seems to have it well in hand, and isn't bothered by word games... -- Floyd L. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@barrow.com
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Posted by VWWall on July 12, 2005, 12:14 am
Please log in for more thread options >
>>"Floyd L. Davidson" wrote:
>> >> >>>>>With an ATX supply, no such AC cord exists, and instead the
>>>>>green wire on the connector (routed through pins on the >>>>>motherboard) is switched to ground by the front panel ON/OFF >>>>>switch, and that causes the AC to be remotely switched inside >>>>>the power supply. >>>> >>>>Not quite accurate. >>> >>>You've just repeated the same thing I said with more (and >>>unnecessary) detail. How is it not accurate? >>
>>You stated that the green wire is switched to ground by the front >>panel switch. It is not. >
> > It *is*. (Please read what people *say*, not what you want them > to have said.) You did *say*: "causes the AC to be remotely switched...". The AC is already on, which provides the +5 VSB. The grounding of the green wire just turns on the DC switch circuit. Holding in the front panel switch causes the MB logic to remove the ground and turn off the ATX power supply. -- Virg Wall, K6EVE | |||||||||||||||||||||||||||||||||||||
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Posted by Floyd L. Davidson on July 11, 2005, 5:27 pm
Please log in for more thread options >
>You did *say*: "causes the AC to be remotely switched...". >The AC is already on, which provides the +5 VSB. The grounding >of the green wire just turns on the DC switch circuit. Holding "The DC switch circuit"?? >in the front panel switch causes the MB logic to remove the
>ground and turn off the ATX power supply. I think you're trying a little too hard on that one. -- Floyd L. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@barrow.com
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Posted by VWWall on July 12, 2005, 6:34 am
Please log in for more thread options Floyd L. Davidson wrote:
>
>>You did *say*: "causes the AC to be remotely switched...".
>>The AC is already on, which provides the +5 VSB. The grounding >>of the green wire just turns on the DC switch circuit. Holding >
> > "The DC switch circuit"?? The pulse width modulator to the DC switching transistors. That's why they're called "switching power supplies". >
> >> in the front panel switch causes the MB logic to remove the
>>ground and turn off the ATX power supply. >
> > I think you're trying a little too hard on that one. Not hard at all--that's how it works! :-) -- VWW | |||||||||||||||||||||||||||||||||||||
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Posted by Floyd L. Davidson on July 12, 2005, 1:07 am
Please log in for more thread options >Floyd L. Davidson wrote:
>>
>>>You did *say*: "causes the AC to be remotely switched...".
>>>The AC is already on, which provides the +5 VSB. The grounding >>>of the green wire just turns on the DC switch circuit. Holding >> "The DC switch circuit"??
>
>The pulse width modulator to the DC switching >transistors. That's why they're called "switching power >supplies". Ahem... technically that fits what I said. >>
>>> in the front panel switch causes the MB logic to remove the
>>>ground and turn off the ATX power supply. >> I think you're trying a little too hard on that one.
>
>Not hard at all--that's how it works! :-) Nobody was trying to describe the internal circuitry in the power supply. It was intended to be a single phrase reference, not a detailed description. It was correct. You are trying awful hard, for nothing. -- Floyd L. Davidson <http://web.newsguy.com/floyd_davidson>
Ukpeagvik (Barrow, Alaska) floyd@barrow.com
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