3.5 floppy connectors

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I'm taking an floppy drive from my older Sony Vaio computer to install
in a new Acer. (I have a very infrequent need to access some old disks.)

I thought I could take the cable, complete with female sockets, and use
it in the Acer, but the connectors are slightly different. On the Sony
the connector to the motherboard has one female socket blanked off (pin
5, I think, on the red edge), but the Acer motherboard uses pin 3, but
has pin 5 blanked off.

I could make the cable's motherboard connector fit if I drilled out the
blanked off pin 3 socket, but if the OS actually uses either pin 3 or
pin 5 my drive wouldn't work, right?

Do I have to have a new cable with the right connectors made?

Thanks for any help.

Re: 3.5 floppy connectors

Art wrote:
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It's not necessary, but I personally wouldn't want to degrade a cable by
"de-polarizing" it.  Do you want me to mail you a cable?

Here's a blurb that addresses this disparity:

| On some mainboards pin 3 is used as the key (missing pin)
| and on some pin 5 is used as the key pin, while a lot of
| mainboards don"t have the key pin removed at all. This
| can all cause problems when using cables which have the
| key pin hole closed. As all odd pins are ground there are
| no technical implications in modifying such cables by
| removing the key pin closure by force.


Re: 3.5 floppy connectors

Grinder wrote:
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Er, scratch that--none of my cables are keyed on pin 3.  I guess it's
"drill, baby, drill."

Re: 3.5 floppy connectors

Grinder wrote:
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Sometimes it isn't even a matter of drilling since there is a good chance
that there my just be a plug in the "key" hole. These are not always easy
to detect unless you use a magnifier but if it is a plug it can sometimes
be removed with a craft knife.

John McGaw
[Knoxville, TN, USA]

Re: 3.5 floppy connectors

Grinder and John,

Thanks you for your quick replies.

I'll try drilling, or removing the plug, if there is one.

(I had been concerned that connecting a pin that wasn't supposed to be
connected would cause some sort of problem; but if all odd pins are just
grounds, it should be okay.)

Non-Hardware Guy!

John McGaw wrote:
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Re: 3.5 floppy connectors

On Wed, 28 Jan 2009 19:27:47 GMT, Art

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It won't cause a problem.  I find it easier to just heat up
a needle, then use that to melt a hole, then a razor blade
or knife to trim the surface flat again.  Takes less time
than drilling, even though I have a drill press and carbide
PCB bits sitting next to it (typical hardware store drill
bits go down to about 1/16" which is not small enough to
drill the hole in the connector).

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