this post was submitted on 10 Oct 2023
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I found it at the dollar store.

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[–] flakeshake@feddit.de 40 points 1 year ago* (last edited 1 year ago) (3 children)

Such A-to-A adaptors and cables always have been prohibited by the USB spec, but people built them anyway. A common usecase for "illegal" A-A cables i remember was connecting PCIe cards (especially GPUs and mining cards) externally to riser sockets.

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[–] Nioxic@lemmy.dbzer0.com 38 points 1 year ago (1 children)

It turn@ a usb extension cable into a regular usb

I guess that could be a use case?

[–] stebo02@sopuli.xyz 5 points 1 year ago (1 children)

wouldn't that just make this thing longer? we'd still have the same problem

[–] Bishma@discuss.tchncs.de 10 points 1 year ago (1 children)

There are female-female USB extension cables. As to why those exist...

[–] XTornado@lemmy.ml 5 points 1 year ago* (last edited 1 year ago) (1 children)

They are good for wifi/bt/radio usb receivers used for keyboard/mouse/gamepads...so they can be in a better place like higher or further.

[–] Stormyfemme 2 points 1 year ago (1 children)

Those still need to get plugged in to the device somehow lol

[–] XTornado@lemmy.ml 2 points 1 year ago* (last edited 1 year ago)

Yeah.... honestly somehow I missed the female-female part πŸ˜‚ I thought it was male-female.

Well then it's used in combination with a male male for sure otherwise yeah O don't see any use unless there is some weird device with male input.

[–] trailing9@lemmy.ml 31 points 1 year ago

Sometimes you have a female to female cable.

[–] Franzia@lemmy.blahaj.zone 26 points 1 year ago (2 children)

Gex 3D: Enter the Gecko

[–] theKalash@feddit.ch 14 points 1 year ago* (last edited 1 year ago) (1 children)

To connect two USB-A ports.

Basically the same as a USB-A to USB-A cable, just really short.

[–] BorgDrone@lemmy.one 19 points 1 year ago (3 children)

USB-A to USB-A cables do not exist, the USB standard does not allow them, if you have a cable with two USB-A connectors then it’s not actually a certified USB cable. The same goes for USB extension cables and this adapter. Note how there isn’t a β€˜USB certified’ logo on the package.

[–] theKalash@feddit.ch 7 points 1 year ago (3 children)

USB-A to USB-A cables do not exist

wtf are you talking about, of course they do.

[–] BorgDrone@lemmy.one 7 points 1 year ago (1 children)

Show me where in the USB standards these are specified.

[–] theKalash@feddit.ch 7 points 1 year ago (1 children)

They cables and exist and they work. So being "specified" doesn't mean jack shit.

[–] BorgDrone@lemmy.one 2 points 1 year ago

They might sometimes work. They aren’t guaranteed to work.

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[–] DrQuint@lemm.ee 4 points 1 year ago* (last edited 1 year ago) (1 children)

USB-A to USB-A doesn't exist

*looks at old charger from an American device*

HOLY SHIT A CRYPTID CALL SCP

[–] BorgDrone@lemmy.one 1 points 1 year ago (1 children)

That’s not a USB charger.

[–] DrQuint@lemm.ee 2 points 1 year ago* (last edited 1 year ago)

HOLY SHIT AN UNIDENTIFIED CRYPTID CALL SCOOBYDOO!

[–] squiblet@kbin.social 1 points 1 year ago (1 children)

It’s not hard to imagine a product that would require one, though. It’s how every phone charging cable works, just with a different size male USB on one end.

[–] BorgDrone@lemmy.one 1 points 1 year ago* (last edited 1 year ago)

It’s how every phone charging cable works, just with a different size male USB on one end.

No, it's exactly not how every phone charging cable works, at least not for non USB-C cables.

Pre-USB-C cables are explicitly unidirectional. In USB there are 'hosts' (usually computers) and 'devices' (flashdrives, camera's, mice, keyboards, etc.). The host side always has a female USB-A connector, a device either has a female USB-B connector (if it's intended to be used with a cable), or a male USB-A (if it's intended to be plugged in directly into a host, like a flash drive). A real, standard-conformant USB cable can only go from USB-A male to USB-B male (with the addition of USB-C, it can also go from A-to-C, from C-to-B, or C-to-C). Never A-to-A or B-to-B, extension cables (male to female) of any type, A, B or C, are not allowed either.

USB was specifically designed like this so you can never connect a device to a device or a host to a host.

On the host side, you pretty much only see full size USB-A ports. On the device side there are 3 common types of USB-B ports: standard size (you can for example see these on printers and scanners), mini-USB-B used a lot on older phones, and later micro-USB-B. On each side the male part is on the cable, the female part is on the host or device.

[–] tkk13909@sopuli.xyz 13 points 1 year ago

LUSBian sex obviously!

[–] blackn1ght@feddit.uk 12 points 1 year ago

I dunno but it bothers me how much plastic wrapping that fucking thing apparently needs.

[–] Murais@lemmy.one 11 points 1 year ago (1 children)

You ever watch Requiem For A Dream?

[–] Fraylor@lemm.ee 5 points 1 year ago

ASSSSSSS TO ASSSSSSSS

[–] Ravi@feddit.de 8 points 1 year ago

It's an Usb-A gender changer. It's not that useful but you could use it to turn an otg adapter (female usb-a to male usb-c) into a regular usb-c cable. I'd rather buy a usb-c cable though.

Many cheapo sata connectors need a cable like this(I use a male A to female micro b and then a female micro b to male A, it gets the job done)

But connector, idk

Not one that short but I do have A to A cord like that in use. In my case it's with a KVM that I lost and AC adapter for but found that if I plugged in to one of the rear console connections it could get it to power on from the USB device. Cable it to a USB charging port on the front of one of the UPS and away it goes.

[–] fubarx@lemmy.ml 4 points 1 year ago

So your pets can't chew the hard-disk cables.

Unless you have a pet rabbit.

Angering the USB-IF

[–] RHOPKINS13@kbin.social 2 points 1 year ago (1 children)

I actually have a APC UPS at work that uses a USB-A to USB-A cable. You can look up the cable online, it's part number 940-0504. I was surprised APC used such a cable. I think if you tried to do something dumb like connect two PCs together with it, one of the USB ports would fry.

[–] Rin@lemm.ee 4 points 1 year ago

pretty sure i tried it as a kid and nothing happened.

[–] Dirk@lemmy.ml 2 points 1 year ago

Finally! USB Direct Connect!

[–] brunofin@lemm.ee 1 points 1 year ago* (last edited 1 year ago)

I have a cheap HDMI capture device that takes in video input, exposes it to the computer as a regular webcam, and then outputs it back to HDMI. It gets the job done.

It uses an USB male to male for power, and a regular one for data.

That said, not sure how a short one like that would help.