Designing isolated flyback with multiple outputs

UPDATE: as suggested, I split this question into separate parts (links below). I left the last one here. It is so silly I am rather proud of it ;)

UPDATE 2: it seems that breaking one post into multiple questions only annoyed people, which wasn't my intention. Please, accept my apologies for the spam.

Over past few weeks I've been reading LT datasheets and application notes and everything I googled on the web. While I think I am getting the basics right, some rather unexpected questions popped up and I could not find definite answer to them. I'd appreciate any help or even a point to the reading material I could use, something like "flyback for dummies" would be the best :)

Switch voltage drop

Isolated secondary coils

Calculating minimum primary turns - Answered

• Ahem...It is the number of questions you are asking about a very complex device-a multi output flyback power supply. Only a skilled engineer would attempt it, and your many questions tell us you have no skills. I think I am getting the basics right. You need to be far beyond that to even consider building a flyback SMPS. – user105652 May 28 '18 at 23:41