I would like to power a floppy drive without using a PSU out of a computer, and power it off something like batteries or a bench power supply, I know that the red wire is 5v and the black is ground and the yellow wire are 12v, however I want to know why there are two different power inputs the red and yellow wires.
I think there are 2 different power inputs as they control different things Ie the yellow (12v) controls the stepper motor inside and the 5v the floppy drive read head but I am not sure on this and would like some on to help clarify