DIY Jumper Wires

I love using these jumper wires for prototyping. They work great for breadboards and Arduino headers.

You can buy them all over the place including SparkFun.  They are available male/male, male/female and female/female in various lengths.

Sometimes you need to hook up something that already has wires attached. I got these pins and single pin housings from Pololu the other day.

I really like them.  The housing works for either male or female pins.  You can either manually crimp the pins with a needle nose pliers or use a real crimper.  The crimper works for both the male and female pins.

Here are the links to the parts.  If you know of other sources, please add them in the comments.

Male Pins

Female Pins

Single Pin Housing.


Proper use of a crimper is a learned skill.  You need to take the time to learn it.  I lend out my crimpers all the time.  Many people try to use their first attempt in project.  The pin falls off or does not have a connection.  They then give up and use pliers.  The bottom line is there is no better way to put the pin on than a proper set of crimpers.  This is how the professionals do it.  It only takes a few attempts to get it right.  Take the time.

One of the biggest mistakes newbies make is stripping too much insulation.  It is usually just a tiny amount and only the length of the wire barrel portion.  It is very important that the insulation barrel of the crimp grabs onto the insulation.  That is the thing that really holds the pin from being pulled off.

I always buy my crimpers from eBay where they are usually about 25% of retail.  Avoid generic or all purpose crimpers.  Try to get the manufacturers brand.

The crimpers I used are Ampmodu Mod 90418-1.  The can be found used on eBay for around $50.  Pololu suggests you can use this general purpose crimper.  I also have that crimper and it works better than anything you could do by hand, but is no where near as good as the real one.  The 90418-1 has a little “gate” thing that fits between the part the crimps on the insulation vs the part that crimps on the wire.  This allows it to crimp just right on each part and sets the depth of the inserted wire.  It also has two different wire size ranges.You can see this gate in the picture as the shiny bit with the square cuts.



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2 Responses to “DIY Jumper Wires”

  1. Andrew Price

    Could you possibly add a link to some decent crimpers pls Barton?

  2. bdring

    I updated the post with the crimper part number ad some additional information about the crimpers.