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In Reply to: RE: Linear PSU again: help needed posted by Mihaylov on December 12, 2010 at 08:31:31
Mihaylov,
I am not sure I can agree with your suggestion.
I do not have a Juli@ and my Lynx card would require triple voltage (+5V, +12V, -12V), so I am not going to power for it separetly but through the board.
My idea was to have:
Cable no.3 - (+5V, +12V, ground) for HD, USB, int. LCD + extra device
Cable no.2 - (+12V, ground) for CPU/P4
Cable no.1 - (+3.3V, +5V, +12V, -12V, 5VSB, ground) for mainboard/P24
You suggest to have "separate low-power psu for 5VSB and pwr_ok, delay board for pwr_ok is in the PC case, for example near the P24 socket", any particular reason?
I was thinking to keep everything together, inside the power box.
You also suggest Neutrik connectors. I think I am going to use different power connectors with screw rings which are often used for double frame high-end audio geare.
All transformers are custom made.
Follow Ups:
OK. But I think it would be acceptable to unite cables no.3 and no.2.
Delay circuit for pwr_ok works from system board's PS_ON input signal and so it's useful to place it near P24 socket.
http://cmp2-mihaylov.narod.ru/
Mihaylov,
You suggested "separate low-power psu for 5VSB and pwr_ok".
Do you mean, "separate from your main +5V linear supply?
Did you mention this in your PDF design plan?
Could you please tell why and what kind of low-power psu?
I would need your info to implement it.
Thanks
-Do you mean, "separate from your main +5V linear supply?- Yes.
-Did you mention this in your PDF design plan?- No. It's a new option offered Greg and improving a sound.
I use such linear psu for 5VSB and pwr_ok in my alternative cMP2's linear PSU (see Photos from my site).
http://cmp2-mihaylov.narod.ru/
Using your delay circuit does Pin 16 PS_ON (Green) get connected on P24?
Thanks
Yes, certainly. Pin 1 DD1 is connected to pin 16 socket P24 of the system board. The system board is started by pressing the button on Zalman's front panel.
http://cmp2-mihaylov.narod.ru/
Thanks.
I wanted to be sure becaus in your PDF design plan, on the last page, Pin 16 is set to No Connection.
"...in your PDF design plan, on the last page, Pin 16 is set to No Connection." - It's correct because delay circuit isn't use in initial variant of linear PSU for GA-G31M-ES2L system board.
http://cmp2-mihaylov.narod.ru/
Thanks a lot.
I will upgrade "my" plan :)
When you say ""separate low-power psu for 5VSB and pwr_ok", was this in your PDF design plan?
What kind of low-power psu?
Thanks
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