On Mon, May 22, 2006 at 06:15:24PM +0200, Matthias Schniedermeyer wrote: > You just described the working-principle of a "line-interarctive" UPS. > AFAICT this is the most used UPS-type, at least for every "small" UPSes > i've seen in the last few years. Exactly, and since I cannot afford to buy one I'd have to build it myself using mainly car batteries. The most complex part would be to charge the batteries in a way that won't kill them over time. Building such stuff into the PSU after the secondary coil and AC/DC converter would save the double-conversion loss, therefore making this ideal for a single machine. But I'm still brainstorming, lacking both money and time. Kind regards, Chris
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