Re: second power supply

John John,

Used to be if you ran a PS wide-open with no load, it too was toast! Maybe
still is, but I'm not going to try it. Generally 12v is enough of a load to
prevent this, although some even required a small 5v load as well.

--
HTH,
Curt

Windows Support Center
www.aumha.org
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http://dundats.mvps.org/Index.htm

"John John" <audetweld@xxxxxxxxxxx> wrote in message
news:eTYGaErBIHA.5328@xxxxxxxxxxxxxxxxxxxxxxx
| 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%2012%20V%20Power%20Supply.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.
| > "John John" <audetweld@xxxxxxxxxxx> wrote in message
| > news:uQqqsEiBIHA.484@xxxxxxxxxxxxxxxxxxxxxxx
| >
| >>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?
| >>>>
| >
| >
|


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