>-----Original Message-----
>From: Byron A Jeff [mailto:byron@CC.GATECH.EDU]
>Sent: 22 April 2004 16:43
>To: PICLIST@MITVMA.MIT.EDU
>Subject: Re: [EE:] Power Supplies
>
>
>On Thu, Apr 22, 2004 at 12:03:52AM -0700, Mike nicholas wrote:
>> Couldnt you use an old computer power supply, as far as I know the
>> outputs are 5v and 12v.
>
>A couple of caveats though. The primary one is that a
>substantial load is required in order to get the supply into
>regulation. Tie (and heatsink) a 25W 8 ohm power resistor
>across the +5 supply line. That should force enough current to
>stabilize the supply.
>
>The other is that if it's a current ATX supply you'll have to
>figure out how to switch it to get it to work. See the MB
>actually controls powering up and down the supply, not the
>switch on the panel. Ideally you want to get one that has an
>on/off switch on the supply itself.
>
>BAJ

The last bit is easy, you simply ground the green wire going to the main
connector to switch the supply on.

Regards


Mike




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