All these kits you can buy for arduino come with "jumper wires" which are great for connecting a pin on the arduino to a breadboard. But "pin" on arduino is the wrong word since it's a female part. The "jumper wires" are male on both sides. What about the times where you want to connect a pin from say, the Motor Shield to some other pin? I would need a female to female jumper wire. Do those exist?
Electronic – arduino – Does something like a “reverse jumper wire” exist
arduinoconnector
Related Solutions
I would use two female headers like this...
2X20 40Pin Double Row Female Straight Header
soldered back to back to make a female-female joiner. If you overlap the contacts they only add 15mm to the overall length (compared to a normal male/female header combination) which should not be significant at 32-48MHz.
If any of your signals still have excessive ringing or ground bounce then you could try inserting small value resistors (10~50Ω) in series between the connectors.
Yes there are headers you can use... like the Samtec TFM. A better option for hand soldering a breakout wire would be the Samtec FTS or FTSH (low profile vs standard profile), a plain 0.05" male header, in smd or through hole. It has some standard options and can be found through the typical distributors, Digikey, Mouser, etc.
If you want a standard or easily found part, your out of luck. Either use a header, or grab some appropriately sized wire an make your own cables by splicing the thin wire to some thicker wire, each side going to the corresponding board.
Another option would be to file the pin on your jumper wire down some with a piece of sand paper or a file. Even a nail file would work. Just rub it on it until the pin is thin enough to fit properly. Shouldn't take more than a minute per pin at worst. Alternatively slice some of the copper off with an exacto knife.
Best Answer
There are also female to female jumper wires.