You gentleman may be way ahead of me, but Get a copy of Scott Meullers book
at your local bookstore. It delves into PSU's among a myriad of other
things.
It's kind of considered a bible of sorts.
"Upgrading and Repairing PC's," and only the publisher knows how many darn
many editions are in print by now--it's *that* good. At least 2" thick,
with either CD or DVD versions including old editions of the book
BTW, I tried to turn b11 onto that book as the single best publication on
the market, but I fear it fell on deaf ears.
--
HTH,
Curt
Windows Support Center
www.aumha.org
Practically Nerded,...
http://dundats.mvps.org/Index.htm
| It is by far the most ridiculous idea I have ever heard of whether there
is
| a site explaining it or not.
| Ask any good electronics engineer.
| 1.Just two examples of many. How do you control power good? Power good is
| developed when all power is available and then used as a reset for the
| computer.
| 2. How do you eliminate ground loops?. The computer will be so unstable as
| to make it useless. .
| | > Why will that matter? You really should read things twice before you
| > post! The primary PSU will still controll all of these features, the
| > second PSU is "supplementary", maybe b11 wants to put a disco ball in
his
| > computer! The other link that I gave to b11 shows how to use more than
| > one PSU and it gives reasons as to why someone might want to do so.
After
| > I read it and thought about what it is that "moders" do the idea started
| > making a bit more sense, even though I wouldn't use or recommend using 2
| > PSU's I now have a better understanding of why some may want to do so
and
| > it isn't such a far fetched idea after all.
| >
| > John
| >
| > Unknown wrote:
| >
| >> Once again as usual you don't understand. How for example is power
| >> on/off, standby, and hibernate incorporated on the on/off switch.
| >> | >>
| >>>Once again, as usual, you don't research anything and you argue about
| >>>things you know nothing about. If there is a load on the 5v line
(b11's
| >>>hard drive provides that) the PSU should start. It wasn't my
intentions
| >>>to search for b11's project but because it is apparent that you can't
use
| >>>a search engine I did a quick search and found this:
| >>>
http://www.nfdc.net/home/cbdb/Teardrop 12 V Power Supply.htm
| >>>
| >>>Now, before you come back with more arguments, I should make it
perfectly
| >>>clear that I do not endorse b11's idea or recommend that anyone try
what
| >>>he is doing! He could very well fry his whole computer with his
| >>>inventions but that is b11's problems, not mine. If he wants to
| >>>"thinker" he will have to do his research and homework. Another poster
| >>>in another group (b11 multi-posted to other groups) informed b11 that
he
| >>>may also need a 'power good' signal for the PSU to keep operating, so
| >>>maybe he needs to do more that close the PS-ON circuit for this to
work,
| >>>b11 will have to do his research and find out for himself what need to
be
| >>>done for his project and tinkering to work as he intends.
| >>>
| >>>John
| >>>
| >>>Unknown wrote:
| >>>
| >>>
| >>>>I don't believe that is true at all. If it were as you say, power
would
| >>>>come on as soon as it were plugged in.
| >>>>That is not the case. When the switch is pushed in it provides a start
| >>>>pulse to the power supply. That requires a
| >>>>normally open switch. All computer power supplies are 'switch mode'
and
| >>>>require a start pulse.
| >>>>Also, if true as you say, power would immediately drop as soon as the
| >>>>power on button was pushed in.
| >>>>That is not the case. It must be held in for at least four seconds.
| >>>>| >>>>
| >>>>
| >>>>>Yes, exactly. In a computer the main switch on the power supply is
| >>>>>always on, you don't switch that off when you turn off the computer,
| >>>>>you open the PS-ON circuit (pres the on/off button) and the power
| >>>>>supply turns off. Think of the lights in your living room, when you
| >>>>>want to turn them off you don't go to the main power panel and switch
| >>>>>it off, you flip the light switch. If you throw the main switch from
| >>>>>the off to the on position at the power panel, if the light switch is
| >>>>>off in the living room the lights won't come on, the same deal with
the
| >>>>>power supply, you have to close or complete the PS-ON circuit, that
is
| >>>>>the equivalent of the light switch in the living room. You can use
the
| >>>>>main switch on the power supply if you want but to do so you will
have
| >>>>>to close the PS-On wire to the ground wire, do some searching on the
| >>>>>net and you should find out more about the wire assignement for the
| >>>>>PS-ON wire, then stick a wire
| >>>>
| >>>>>from it to the ground, or wire it to a small switch or use alligator
| >>>>
| >>>>>clamps to close the circuit.
| >>>>>
| >>>>>John
| >>>>>
| >>>>>b11_ wrote:
| >>>>>
| >>>>>
| >>>>>
| >>>>>>I flipped the on-off switch on the external, supplemental, power
| >>>>>>supple to on but that power supple did not turn-on. Are you saying
| >>>>>>that I _ALSO_ must complete a circuit to get that power supple to
turn
| >>>>>>on?
| >>>>>>__________________________________________________________
| >>>>>>"John John" wrote:
| >>>>>>
| >>>>>>
| >>>>>>
| >>>>>>
| >>>>>>>Buy a bigger proper power supply? The circuit has to be completed
on
| >>>>>>>the PS-ON wire if you want the power supply to run. In other words
| >>>>>>>the switch is off until you complete that circuit, the same as when
| >>>>>>>you press the on switch on a computer.
| >>>>>>>
| >>>>>>>John
| >>>>>>>
| >>>>>>>b11_ wrote:
| >>>>>>>
| >>>>>>>
| >>>>>>>
| >>>>>>>
| >>>>>>>>I am trying to use a spare power supply as a supplemental power
| >>>>>>>>supply. There is no room in the case for a second power supply so
I
| >>>>>>>>put it outside the case and threaded the cables through the back
of
| >>>>>>>>the computer case then attached the cables to unattached hard
| >>>>>>>>drives. Then, I turned-on the spare, external, power supple then
| >>>>>>>>turned-on the internal power supple but the spare, external power
| >>>>>>>>supple did not turn-on. What should I do?
| >>>>>>>
| >>>>
| >>
| >>
| >
|
|
