General > General Technical Chat
USB B Fem to USB A Fem adapter.
Ed.Kloonk:
I have a number of old USB printer cables that out-lived the printers they came with. Thought I'd get a few adapters for the printer end of the cable and turn them into short USB 2 A(M/F) extenders.
Can't find to many of what I want but there are many USB B male to USB A male adapters. My question is why? I thought I idea of USB B was in going and for outgoing you provided USB A , yet the majority of these adapters seem wrong. Or am I wrong?
This is what I mean. The USB B is the wrong gender for what I want. But why would you use this adapter?
https://www.amazon.com.au/Electop-Female-Print-Adapter-Converter/dp/B014RESWU4
Bassman59:
--- Quote from: Ed.Kloonk on January 31, 2022, 03:13:41 am ---I have a number of old USB printer cables that out-lived the printers they came with. Thought I'd get a few adapters for the printer end of the cable and turn them into short USB 2 A(M/F) extenders.
Can't find to many of what I want but there are many USB B male to USB A male adapters. My question is why? I thought I idea of USB B was in going and for outgoing you provided USB A , yet the majority of these adapters seem wrong. Or am I wrong?
This is what I mean. The USB B is the wrong gender for what I want. But why would you use this adapter?
https://www.amazon.com.au/Electop-Female-Print-Adapter-Converter/dp/B014RESWU4
--- End quote ---
The whole point of the USB-A and USB-B connectors in the very beginning was to ensure that the user could not plug a host into another host, or a device into another device. USB-A is always host side, USB-B is always device side.
There was never any need for gender changers or USB-A to USB-A adapters or USB-B to USB-B adapters because the USB specification specifically precluded them.
Why are these adapters made? Who knows. They have no use, unless you're making something custom for your own use, and ... you shouldn't bogart a USB connector for use in something that's not USB.
Anyway, by "USB Printer Cable" do you mean USB to Centronics Parallel? Because otherwise a "USB printer cable" is nothing more than the standard sort of USB cable.
Ed.Kloonk:
--- Quote from: Bassman59 on January 31, 2022, 03:45:32 am ---
Anyway, by "USB Printer Cable" do you mean USB to Centronics Parallel? Because otherwise a "USB printer cable" is nothing more than the standard sort of USB cable.
--- End quote ---
No. Not Centronics. I want to convert standard USB appliance cables(1) into USB extension cables(2).
(1) https://www.amazon.com.au/UGREEN-Printer-Scanner-Lexmark-Samsung/dp/B00P0FO1P0/
(2) https://www.amazon.com.au/AmazonBasics-Male-Female-Extension-Cable/dp/B00NH11R3I/
magic:
Extension cables and all those adapters are not compliant with the USB spec, although nothing technically stops you from making them and some people do.
The ones you found could be used to plug cables with male A on both ends into printers. I'm surprised that somebody even bothered making them. Male A-A cables are not very common and obviously not compliant too, but they were sometimes used by small (flat) devices like 2.5" HDD enclosures which didn't want the bulk of the original B socket before mini- and micro- became widespread.
thm_w:
https://www.l-com.com/usb-usb-adapter-b-a-black
I would send you some but its probably cheaper to just buy extension cables. Especially to AUS.
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