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Forum: ARM programming with GCC/GNU tools Looking for connectors for header pins


Author: Cem Eryasar (Guest)
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Hi all,

I have a Olimex LPC-213X-B with 2138 on it. There are two rows of 2x16
header pins on both sides of the board. As a temporary solution I
attached a standard hdd cable with 2x20 pin female connectors from an
old computer. Then I cut out several cables from the 40way flat cable
and used them without a problem.

However these flat socket/cable combination is too bulky and I do not
need many pins. Therefore I want to replace both of them with 1/2/3 way
single row female sockets and connect them only to the pins I need.

But, I do not know the names and part numbers of such sockets, neither I
could locate them on the net. Please help.

Thanks
Cem Eryasar

Author: Clifford Slocombe (clifford)
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It is probably a good idea to post a link to the board you are talking
about. That way others that may not have the board may still be able to
help you. I presume you have this:
http://www.olimex.com/dev/lpc-p2138.html, although the arrangement of
teh headers does not seem to match your description.

The documentation does not specify, but they look like standard 2mm
pitch inter-PCB headers. Connectors for these are normally sold as
connector shells into which you insert leads terminated with crimp
terminals. The correct crimp tools are often expensive, and alternate
crimp methods result in unreliable connections - for small projects it
is generally less expensive to purchase pre-crimped leads. These are
usually crimped at both ends. If you only want one end, you can save
money by buying half as many at twice the length, and cutting them in
two. There are available connectors with soldertags on the back. These
are normally intended for PCB mounting, but might be used for temprorary
flying leads when used with  heat-shrink tubing perhaps.

The Harwin M22 range are suitable.

Check my assumption about the 2mm pitch, however Harwin will probably
have something suitable. You can search thier range by pitch. You will
need to find a local supplier, such as Farnell. The Web-site lists
global distributors (you did not say where your were).
http://www.harwin.com/

Clifford

Author: Cem Eryasar (Guest)
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Sorry, I forgot one letter: LPC-H213X-B
http://www.olimex.com/dev/lpc-h2138.html
The pin pitch is 0.1 inch (2.5mm). The 16 pin header takes about 4cm.
Thanks for the link!
Cheers
Cem

Author: Clifford Slocombe (clifford)
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Cem Eryasar wrote:
> Sorry, I forgot one letter: LPC-H213X-B
> http://www.olimex.com/dev/lpc-h2138.html
> The pin pitch is 0.1 inch (2.5mm). The 16 pin header takes about 4cm.
> Thanks for the link!
> Cheers
> Cem

Harwin have a number of parts that may suit your needs in teh M20 range,
but the 2.54mm (0.1") M20-107 crimp shells appear to be 12+12 maximum
size. Of course you can use two or more adjacent shells. I think also
that the SIL shells (M20-106) will stack side-by-side and face-to-face.
Don't forget you need the crimps and crimp tool to go with them.

To save cost, and for prototyping use you might get away with a
M20-782(SIL) or M20-783(DIL) socket and some heat-shrink tubing or even
two-part epoxy adhesive to provide strain relief.

Clifford

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