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First post, by tegrady

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Is there an adapter available that will convert a standard 3.5" floppy drive cable connector to a 5.25" floppy drive cable connector?

I am asking because I have found an adapter that converts a 3.5" floppy drive to USB via an internal connection to a USB 2.0 header. I want to do the same thing with a 5.25" floppy drive, but, of course, the connector for the 5.25" floppy is not compatible with this USB adapter.

Therefore, I am looking to see if there is a adapter that will connect between the standard 3.5" floppy cable and the 5.25" floppy drive.

I did a quick search, but could not find anything.

Thanks in advance.

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Last edited by tegrady on 2019-08-04, 19:28. Edited 1 time in total.

Reply 1 of 14, by Deksor

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Actually I'm more intested by the 3.5" to USB adapter rather than 3.5" to 5"1/4 ^^
(By the way, there are many floppy cables that provide both connectors)

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Reply 2 of 14, by JudgeMonroe

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Deksor wrote:

Actually I'm more intested by the 3.5" to USB adapter rather than 3.5" to 5"1/4 ^^
(By the way, there are many floppy cables that provide both connectors)

It's likely that the USB adapter *is* the cable, i.e., it does not provide an opportunity to use your own cable.

Reply 3 of 14, by tegrady

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I updated my original post to include a picture of the USB adapter. I need something to convert the 34-pin "cable" shown to allow it to plug into a 5.25" floppy drive. Thanks.

Reply 4 of 14, by PC Hoarder Patrol

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Wouldn't be hard to make your own - all you'd need is a short length of old floppy cable with a suitable 34 pin female edge connector at one end and a 34-pin male IDC ribbon connector at the other.

Reply 5 of 14, by Deksor

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Well sure this might not be something I can make myself, but perhaps you can buy it new ?

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Reply 7 of 14, by Mister Xiado

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Seems like a missed opportunity, if it doesn't play ball with 5.25" drives. Of course, I used to use a 5.25" floppy drive with my Windows 7 system, but its motherboard still had a floppy connector.

That's right, it's a DVDRW drive.png
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Reply 8 of 14, by Merovign

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1) USB 5.25" drives have existed, but they're extremely rare. ( http://www.deviceside.com/fc5025.html )

2) Generally external USB 3.5" chipsets don't support 5.25" drives, but I can't speak to this one as I haven't seen it before. So you probably won't be able to use it with a 5.25" drive.

But if you do, let us know where you got it so we can buy them out of stock!

*Too* *many* *things*!

Reply 9 of 14, by tegrady

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derSammler wrote:

Such adapters do exist, but you can not connect a 5.25" disk drive via USB. It simply won't work.

Where can I find one so that I can give it a try? Thanks.

Reply 10 of 14, by thevdm

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Theoretically you could create a coupler using 2.54mm header pins so you can just plug an old FDD cable into it

2x36IDCHeader_2-800.JPG

They can be cut down to the correct length using wire cutters and the blank pin can be pulled out with pliers, might be worth addig a couple of cable ties to hold it all together. The main question would be whether one of the USB adapters would support a 5.25 drive, I've looked at them in the past when I've thought about adding an internal 3.5" drive to my modern computer.

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Reply 11 of 14, by HanJammer

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I've seen adapters to connect 3,5" fdd to 5,25" fdd ribbon cable (in fact I have at least 5 of them), but the other way around - nope (it doesn't mean they don't exist of course).

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Reply 12 of 14, by Deksor

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Maybe someone could make a universal USB fdd controller out of an arduino such as the arduino leonardo ? (One could push the thing even further maybe by making it a more permissive controller to backup protected games/write to Amiga/mac floppys)

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Reply 13 of 14, by HanJammer

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Deksor wrote:

Maybe someone could make a universal USB fdd controller out of an arduino such as the arduino leonardo ? (One could push the thing even further maybe by making it a more permissive controller to backup protected games/write to Amiga/mac floppys)

There is such controller already and it's called KryoFlux.
https://webstore.kryoflux.com/catalog/product … &products_id=28

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Reply 14 of 14, by Deksor

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Yeah but that one is quite expensive, I thought about a cheaper and free alternative.

Edit maybe doing this with a raspberry pi zero would be cheaper and need less low level programming ? (at least for testing proposes)

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