Re: [CAD_CAM_EDM_DRO] ATX Power supply soft power switch hack...Anyone done it?

It is the motherboard BIOS that has the "Power state after power fail"
feature.

The ATX powersupply is "dumb"

All ASUS motherboards I have used in the last 6 - 8 months have these
options.

Critical if you are building servers, building monitoring controls etc even
if you have battery backup.

Side note If you have SOYO motherboards in the 6BA and 5EMA but not 5EMH
versions and it fails to powerup one day check the electrolitic caps near
the Pentium slot 1 connector. If any are domed on the top, swollen etc,
expoded and are labled 6.3VDC carefully replace them with same capacity but
10VDC voltage rating. They are low ESR caps so replace with low ESR. We use
Panasonic caps from DigiKey part number P10224-ND.

This problem may be applicable to other brands also

Hugh

----- Original Message -----
From: "Mr. sausage" <sirsausage@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, January 05, 2002 10:38 PM
Subject: Re: [CAD_CAM_EDM_DRO] ATX Power supply soft power switch
hack...Anyone done it?


> Isn't that an awful 'feature'? I had that problem too. I put a PC in a
car
> to play MP3s (and GPS mapping and other goodies) and had to press the
stupid
> power on button every time I got in. Only thing you can universally do
> would be to build a simple time delay one-shot circuit to pulse the
power-on
> signal. It could be done with a 555 timer, but I was too lazy. I just
> pushed the button.
>
> Some power supplies I've seen (later models) do 'remember' their power on
> state. You might go to your local computer dealer and see if they have
any.
>
>
>
> >From: "bilg63475" <bill@...>
> >Reply-To: CAD_CAM_EDM_DRO@yahoogroups.com
> >To: CAD_CAM_EDM_DRO@yahoogroups.com
> >Subject: [CAD_CAM_EDM_DRO] ATX Power supply soft power switch
hack...Anyone
> >done it?
> >Date: Sat, 05 Jan 2002 21:59:02 -0000
> >
> >I am trying to use a ATX computer with amd 900 athalon chip in a
> >machine and would like to simply power the computer up by switching
> >the ac line.
> >
> >This machine has a main power switch on the back of the power supply
> >which turns off all the power but when switched on, you still have to
> >use the soft power switch ( a spst momentary push button ) to boot
> >the machine and to shut it down.
> >
> >Jumpering this switch does not make it power on when the line is
> >switched and there are no bios settings which enable this feature
> >either.
> >
> >Has anyone else dealt with this problem?
> >
> >Thanks
> >
> >Bill
> >
> >
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> >List Manager
> >
> >
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