I know that USB PSU's are regulated but does that mean I really don't need anything at all in my circuit to have reliable operation?
Now my circuit will be running 24/7 and should be as reliable as possible. The most sensitive part and also central part is an ATMega MCU.
I'm still fairly a noob and would like know if there still could be any hazards coming from USB PSU's and what would you do to avoid them?
There are several questions about USB PSU's already but some of them have answers that give me some doubts about the general short "yes, this will work" answers.
For example I read in this answer that a charger might actually disconnect you at some point, is that true? If yes, can I do something to prevent it? https://electronics.stackexchange.com/a/99187/17371