Re: Computer power supply

From: Art (plotsligt_at_comcast.net)
Date: 01/26/05 

Date: Tue, 25 Jan 2005 21:07:43 -0500

Also, you may need to provide a load to the supply to keep it from shutting
down (protect mode). Many PC Supplies will not continue to run unless
properly loaded, either with a M/B or a "Dummy Load".
"peterken" <peter273@hotmail.com> wrote in message
news:DvBJd.5012$3N1.238688@phobos.telenet-ops.be...
>
> "Mountain Dwe" <plasma@toi.ca> wrote in message
> news:aaadneXThcAaQGvcRVn-1A@rogers.com...
>> ok..
>> That sounds more trouble than convenience.. so let me ask this simple
>> question.....
>> Is the step down transformer in the power supply just a normal step down
>> transformer???
>> I mean can I salvage it and make my own general propose bench power
> supply?
>> I would assume I could use the rectifier diodes on the board too??
>>
>> "JeffM" <jeffm_@email.com> wrote in message
>> news:1106693136.166004.164490@z14g2000cwz.googlegroups.com...
>> > >[just] hook up the power supply to the wall
>> >>and use the 5V, 12V and grounds?
>> >> Mountain Dwe
>> >
>> > Google is your friend.
>> >
> http://groups-beta.google.com/groups?&q=group%3Asci.electronics.*+insubject%3Acomputer-power-supply+bench+OR+stand-alone+OR+experiments+OR+general-purpose
>> >
>>
>>
>
> The stepdown transformer is a switched mode power supply
> (switched primary, rectified secondary, usually pulse width modulated
> circuit)
>
> You *can* make a general 5V supply out of it, but beware of the "power
> good"
> line
> If using it, just use it "as is" since many of them are rather critical in
> layout and used components
> (especially if resonant-mode types)
> I personally wouldn't dream of disassembling it to build another, I'd just
> design another then
>
>

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