Breadboard Connectors - Dupont style male/female at BOTH ends

https://www.ebay.com/itm/10-Pin-Male-to-Female-Jumper-wire-breadboard-0-1-20cm-Pack-of-4-Total-40-Pins/380625930511?hash=item589f12c90f:g:NkgAAOSwxH1T5p8G:sc:USPSFirstClass!63379!US!-1

that was just the 1st on i saw there are many more on ebay

Yes, I am completely aware of this connector you reference.  But unfortunately, I am seeking male/female at BOTH ENDS.  I am NOT seeking a male at one end and a female at the other.  I am seeking a Dupont with male and female at both ends so this makes four connectors.  Thank you for your reply.

Posted by: @eh-bike

So I often make them myself.

Can you post a photo of one that you've made so we can better understand exactly what it is you are doing?

It sounds to me like you want a Dupont wire pair that consists of two wires.  One male-to-female and the other one female-to-male.  But you don't want to just rip Dupont wires apart and turn one of them around?

Is that the idea?

It's not clear to me exactly what you are asking for.

I have attached several photos with details.  I don't see - I can't find - how to attach photos  directly so this paste method seems to work. If you know how to attach photos directly, this would speed up replies.  Thanks for engaging on this issue.  I have lots more questions regarding the details of my project that I will post later.

First Photo is of the overall robot: four wheel drive dc brush motors with encoders driven by a MEGA with interrupts (four used) . Obstacles are detected by Ultrasound driven by an UNO which interrupts the Mega to take an action depending on where the obstacle is.  Notice the electronic compass on the paper tube and the blue, red and yellow LEDs perched above the US sensors. Second photo show a close up of the left side - yellow LED - notice that the BLK ground is shared by the US  sensor and LED.  I had to make this special wiring.  However, if I had a Dupont with a Male& Female at the same end of  wire, I could have avoided the special harness.  Third photo shows the other end of the yellow wire which attaches to the UNO to drive the LED and to Interrupt the MEGA.  Again, I had to make a special harness because  I didn't have access to a Male&Female at the same end.  As I said previously,  I have avoided using a typical breadboard simple to be a pin extender.

Posted by: @eh-bike

However, if I had a Dupont with a Male& Female at the same end of  wire, I could have avoided the special harness. 

I don't know if they make anything like that commercially or not.   For whatever it's worth you're not alone.  I end up cutting up and soldering together Dupont cables and connectors all the time.   I never even thought about trying to find cables that would work in all these special cases.   I just buy the standard cables and chop em up as needed. Just like you did. ? 

One reason I didn't even bother to look for special cables is because I figured that if I found exactly what I needed they'd probably be expensive anyway.  So I just cut and paste.   Or I guess I should say cut and solder.

Welcome to the world of hobby robotics.

That's all I know to say.    And thank the suppliers for at least making shrink tubing available.  That helps to clean up all the cut and soldering wounds.

@robo-pi

@eh-bike

Is the word your looking for "splitter", or "Y connector" ?

http://3dmodularsystems.com/en/connectors/201-2-pins-dupont-wire-extender-female-male-y-shape-20cm.html

Posted by: @spyder

Is the word your looking for "splitter", or "Y connector" ?

I could be wrong, but I think what he's looking for something along the lines of the following:

Posted by: @spyder

@robo-pi

@eh-bike

Is the word your looking for "splitter", or "Y connector" ?

http://3dmodularsystems.com/en/connectors/201-2-pins-dupont-wire-extender-female-male-y-shape-20cm.html

Hey spyder, this is what I am seeking, perhaps, 'splitter' or better yet, 'y connector' terms are what I could have called what I am looking for.  You know: "a rose by another name would smell as sweet".  I will certainly use your suggest and checkout the business URL.  MANY THANKS!!!

@robo-pi

Yes, as I replied to spyder, the sketch you offer is exactly what I was seeking.  The sketch you provide is closer that what spyder offered at the business but you both are quite helpful.  Robo-pi for providing a translation and spyder for an available offering which while not quite what I would like - robo-pi's sketch - will be OK, beats soldering and heatshrinking parts.  Anyway, thanks to Dronebot for offering a forum like this, his educational offerings are inspiring to early users which I consider myself a bit beyond that p0int.  Or maybe not?

cheers

Following up spyder's suggestion, 3dmodularsystems.com is in France so I will inquire about getting delivery to North America.  I will send robo-pi's sketch to several suppliers asking  if parts like this exist. 

OK, just as robo-pi suspected based on earlier post: "exactly what I needed they'd probably be expensive anyway".  While spyder's find is a low cost part, shipping from 3dmodularsystems - France to North America - Canada is  expensive at CDN$32 or US$24 for 4 of these Y connectors.  OK, great try.

Maybe a better approach is buy a Dupont crimper tool with M/F ends, etc.  If either of you have done this, will you suggest a crimper you prefer.  Many thanks in advance.  This has been fun.

@eh-bike

I tried googling "Dupont hermaphroditic connectors"! No luck so far ? ? ? 

Pugwash, nice try & thanks.  I am likely to follow Andreas Spiess -guy with swiss accent and purchase an Engineer PA-09 crimper tool and make what I want.  Robo-pi suggested a home-made approach while not specifically suggested a crimper tool approach.  OK, I feel well served by the collected help of this forum.

Posted by: @eh-bike

Robo-pi suggested a home-made approach

I just buy a bunch of Dupont wire sets and when I need a special configuration I just cut and splice as needed.  As I suggested, with the aid of shrink tubing to heal the wounds it works out pretty well.

The bonus of this approach is that there is no specialized configuration I can't achieve.   Including the precise lengths of the cables I want.   I would be very hard-pressed to find specialized cables for all my applications that just happen to be a convenient length to boot.    So for me the cut and solder paste idea works well.

I never need to actually crimp a connector because I'm patching them together at loose wire ends.   So all the connectors are original.    Like in the following drawing

This way I never need to actually put a connector onto the end of a wire.