Short jumpers required

I've been making veroboard projects to drive DC motors and servos. My aim is to make them as small as possible to allow them to be hidden inside models. My latest has a nano mounted on header sockets and an L293D h bridge mounted in a 16 chip socket. Wiring it up with soldered wires caused problems when change was required so I've added 15 header pins down each side of the nano and header pins on both sides of the L293D. (Except for the 4 x ground and the Vcc2 on pin 8 which is hard wired to the DC socket for 12V. Now I can jump from nano pins to h bridge pins with the ability to quickly change configuration. ie, didn't realise pwm wasn't on all pins so unsoldering made a big mess. Now finally the point of my post. The dupont type jumpers come in 100mm and 200mm mostly. I can't find shorter. 50mm would make it all a lot neater and more compact which is my main aim. So after thinking it over I've decided to make my own. I've soldered a few single female connectors but it's difficult, easy to bend the tiny contact and sometimes they don't lock in. I know, I know, more practice required but I think I've got another idea. Lob both ends of a 100mm jumper to 25mm then slide on some heatshrink, solder them together in the middle and slide the heat shrink over. I think it will be quicker and more reliable. I'll let you know how I go.
Attached is my latest. A motor and servo sheild for a nano with 12v DC socket, headers for 2 motors and 1 servo and soon a 4 pin header for an ultrasonic sensor.

Don't solder the Dupont connectors. They are intended to be crimped. In any case, I don't think that headers and jumpers is the right way to wire up your project as soldering wires makes more sense

To avoid problems, breadboard your circuit first, then when you know that the hardware and sketch work OK move it to strip board, prototype board or even a PCB

And directly to the point of mine… I gots to know, what do you do with these little devices?

Looks like fun. bTw and fWIw, I vote for soldering int the final deployment. Not cutting and splicing longer Duponts, no.


When I need shorter jumpers I cut them to length and then crimp on a pin. Being on the take it easy side I purchase these jumpers that are connected together. When I need multiple conductor cables I simply remove the 1 pole cover and replace with a cover with as many poles as I want.

Done. Cut the lead to length. Remove metal contact from black plastic case by lifting the small black tab and pulling the wire and contact out. Remove the wire from the contact by levering the tiny metal crimp tabs up. Slide the shorten wire in and fold the crimps back over. Add a tiny bit of solder to be sure. Slide back into black plastic case. Why can't I add the photo? Maybe I've reached my upload limit? Edit. Prob with upload solved. It was because I'd opened forum window from outlook. Closed reopened in Chrome. All good.