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On Saturday 28 October 2006 19:51, Dale wrote: |
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> I'm thinking you could make the capacitors on the high voltage side |
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> MUCH larger so it would last longer. It would still have to be a |
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> fast shutdown though. Something like shutdown -h -t -5 minutes ago. |
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> LOL The only thing about that is charging them when you first turn on |
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> the computer. |
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Your average psu uses around 5000 - 15000 uF caps on the mains side. |
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That lasts about 3 mains cycles. I suppose you *could* rig up a 25F |
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array but the caps will cost more than an average desktop machine (!) |
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Batteries = much cheaper. |
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The main reasons no vendor builds a UPS into the power supply: |
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1. Weight |
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2. Extra cost |
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3. Lead/acid battery = presence of sulphuric acid = bad news for |
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motherboards |
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alan |
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