do floppy drives need a switching p/s?
ard at p850ug1.demon.co.uk
Fri Feb 17 18:05:13 CST 2006
> >I've yet to see a floppy drive that used 220/330 ohm terminators. Every
> >one I've worked on just has a 150 ohm resistor to the +5V line. It'll
> >still draw the current if that line is pulled low, though.
> Still, he isn't going to get his 5 volts from the 24 volt
Why not? IIRC there's enough power to supply both rails. A reasnable
step-down switching regulator circuit would have enough efficiency to
supply 5V at 1A and only draw, say, 1/4A from the 24V supply. You can't
use a linear regulator, though.
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