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Hi guys! I have something exciting for you. Over the last few days I've been designing this SMPS. It is only 250W but that's enough for many applications, we don't need 1KW or anything like that. Sometimes more important is the below features, which this circuit demonstrates: - Greater than...

Hi guys, I'd like to design something like this. In the specs it goes from 85 ~ 265 VAC so can be used in any mains worldwide. How do they do that? There is no selector switch. Any schematics or info out there? I'd ideally like +-30VDC out, 250W. Cheers...