Re: second power supply

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You understand nothing...

John

Unknown wrote:

What kind of computer are you talking about? A PS2?
To turn on a computer with a switch mode power supply (about 97% of them) you
push in a momentary contact switch on the front panel which brings the power on line
to the startup circuit to a ground level.
"John John" <audetweld@xxxxxxxxxxx> wrote in message news:ehwAW%23sBIHA.3548@xxxxxxxxxxxxxxxxxxxxxxx

How often do you reach to the back of the computer and switch the main PSU switch off? That switch is always on, there is always power to the PSU to turn it on you simply close the PS-ON circuit. If you cannot understand that then you have misread what I posted and you didn't comprehend the simple analogy to the light switch in the living room. You must be the only one in this group who did not understand what was said.

John

Unknown wrote:


MINE? you are the one that posted all the ridiculous comments about the power on switch. (always on etc) I merely refute that. You seem to get your jollies off when someone either contests or debates with you on your posts by changing and twisting things around. Then you throw insults. Who are you trying to impress? Counter my argument that more needed to be done ????. I was talking about the on/off switch always being on (that YOU said).
Obvious, as displayed in other posts, you can't read and/or add something not there.
Talk about context----reread this entire string.
Why are you so defensive and insulting when someone questions you?.
"John John" <audetweld@xxxxxxxxxxx> wrote in message news:%23glHvHsBIHA.4176@xxxxxxxxxxxxxxxxxxxxxxx


Well now it is absolutely plainly obvious that your reading and comprehension skills are limited to say the least. The link I provided was to show the workings and wiring of the PS-ON mechanism on a PSU and to counter your argument that more needed to be done than closing the circuit in question to get the PSU to work. A 7 year old child could have figured that out and logically adapt the instructions to answer b11's query. Only a fool would assume that that the information PS-ON information there applies to a bench tool only and only someone like you would come back with more silly comments and arguments to the post, it appears to me that you can't keep anything in context.

John

Unknown wrote:



Once again you read things into items that are not there. Go back and read the original post. Notice the OP said he
turned on the spare supply (external) then he turned on the internal. Doesn't this indicate he is paralleling the internal?
This has absolutely nothing to do with taking a power supply and creating a 'bench tool' out of it.
Once again you tell me I don't research anything. I submit you don't understand b11's project.
I need not search things YOU don't understand.
"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?


.

Relevant Pages

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    ... To turn on a computer with a switch mode power supply ... turn it on you simply close the PS-ON circuit. ...
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  • Re: second power supply
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    (microsoft.public.windowsxp.general)
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