I'd like to branch out into audio / synth circuits, many of which call for a dual-rail power supply. I was wondering if I could build a simple one by connecting two little DC-DC buck converters with their inputs in parallel and one output set to half of the other.
In theory 0/9v/18v looks a lot like -9v/0/+9v, but with how cheap and plentiful these little converters are these days I have to wonder why Instructables and the like aren't full of "plans" along these lines... Of course, with how cheap they are, I might just pick up a six-pack and try it.