I'm in the process of cataloging all my wall-warts into a spreadsheet (so that I know how many hundreds of these things there are in the house
; seems like every room has at least several).
I noticed that everyone so far has marking on one of the two DC-leads or the entire lead is white.
Just out of curiosity, I'd like to know, "Is the marked-lead the positive or the negative polarity?"
73 Jerry KM3K FN10je