Do you have a bunch of useless USB-to-PS/2 keyboard adapters laying around? Two of them make a great female-female USB adapter – If you need one that is. Here is how I made one.
Carefully crack the case open using a knife. You can be quite rough at the PS/2 end of the casing as this part will be
Once opened you should basically have a USB-connector connected to a PS/2 connector covered in hot glue/plastic wrapped in a thin-foil like material (for shielding). Remove the wrapping and cut away the PS/2 connector with a knife.
Now, carefully remove the remaining plastic. Don’t worry about the soldered wires but make sure that you don’t damage the pins on the USB connector. You should end up with something like this.
Do the same with another USB-PS/2 adapter so that you basically end up with two USB connectors.
Place the connectors back-to-back and turn one of them 180 degrees so that it becomes “up-side-down”. If you don’t do this you’ll end up connecting the pins in the wrong way.
Cut out a piece of wire and solder it to the casing off each connector. You can use the existing solder points used for the shielding/ground or create a new. Some flux will help a lot here.
That’s it for the connector. Next up is to creating a new casing using the existing casings. Unfortunately I forgot to take pictures of this process.
Will it be as good as a commercial adapter? probably not. Will it effect data transmission? probably (depending on how good the solder joints are). Cheaper than a commercial adapter? yep (assuming you already have the parts needed and don’t factor in the labor :))