deskthority

Does anyone know where to buy a female-female mini USB/mini USB, micro USB/micro USB, or mini USB/micro USB coupler? I have found just about every other combination but these. Thanks.

They break the USB spec, which enforces a host > client hierarchy. What are you trying to do?

Muirium wrote: They break the USB spec, which enforces a host > client hierarchy. What are you trying to do?

Ah! Thanks for this. It is good to know there is actually a logical reason for such a coupler not to exist. I was just being lazy trying to install a flush-mount micro or mini USB connector in a RF board. Looks like I will have to break out the soldering iron after all.

Another alternative that is dead easy but not very aesthetically appealing is to install the Pexon mod, with which you end up with a full-size USB dongle on the keyboard:

http://pexonpcs.co.uk/products/realforc ... 6145584323

I think I would prefer to keep the attached cable until I work out a good way to install a flush-mount micro or mini connector in the RF.

Check these out,
https://www.sparkfun.com/products/12035
https://www.sparkfun.com/products/9966

chzel wrote: Check these out,
https://www.sparkfun.com/products/12035
https://www.sparkfun.com/products/9966

Thanks! In fact, there is post on GH using just such a breakout board for installing a flush-mount USB connector in an RF keyboard:

https://geekhack.org/index.php?topic=50821.0

There are nicer flush-mount micro and mini USB connectors available from Mouser, but the soldering pins on these look difficult to manage (considering my rudimentary soldering skills), so the breakout boards from Sparkfun look like a good solution for me.

I used the mini-USB one to mod my HPE-87 and it worked really nicely.
I have also found a micro-USB extension cord with molded connector if you want to go the pigtail way.

Adafruit also make micro and miniUSB breakout boards:
https://www.adafruit.com/products/1833 https://www.adafruit.com/products/1764

They are smaller than the ones from Sparkfun and cost $1.50 each.

Almost every USB port combo you can find is available on eBay from China for very little, even including shipping.
But those Adafruit boards look more useful than most, because of the mounting holes.

Muirium wrote: They break the USB spec, which enforces a host > client hierarchy. What are you trying to do?

Except for the USB On-The-Go spec where a device port can be either host or client depending on what you plug into the port. Most cell phones and tablets (but NOT Windows tablets ) are OTG these days. Even the AVR at90usb1286 in the Teensy++ 2.0 is capable of OTG.
But plugging two hosts together where none is OTG-capable could cause damage.