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Power supply variable voltage output
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I'm just considering starting a simple desktop power supply board and one of the things I'd like is a variable voltage output from a switching regulator for, say, 0.8V up to 30V or so.
I want to make use of an ATX power supply and figure that the 12V lines could supply the variable output. I still have some learning to do, obviously_^
Do I need two different circuits (one for step-up, one for step down)? Or is there some other regulation circuit that works for boost up/step down regulators?
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