do floppy drives need a switching p/s?

Tony Duell ard at
Fri Feb 17 16:46:37 CST 2006

> behind the drive.  Works fine on a Qume DT-8.  That 24vdc supply you
> mention should do just fine, but the 5vdc draw may be heavier than you
> think, particularly if you have the standard 220/330 terminators installed.

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.


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