If I wanted to make a USB desk fan from a spare CPU fan (input: 12V, 0.15A), could I just solder a resistor to the positive lead of the USB wire? I plan on getting an adjustable voltage booster, but I was curious if this was possible. I think I would need a 13 ohm resistor for USB 3.0.
That’s not what I was saying, PD included 12v up to 2.0 (I am going from memory) so it’s not multi standard support but retrocompatibility from modern PD to the older version
Edit: I checked and the requirement was removed from rev 1 to rev 2 so now it’s optional