"Bob Eager" wrote in message
...
On Sun, 10 Mar 2013 01:08:36 +0000, Andy Burns wrote:

Bob Eager wrote:

I'm making up some flat IDC cables which terminate in a 0.1 inch pitch
IDC header socket. This fits onto a board connector with 9 pins (one
omitted).

Clearly I'd like to fill the unused hole to make it impossible to plug
the things in the wrong way round. I'm probably going to use a blob of
epoxy, but does anyone have their own easy way of doing it?

is a proper Polarizing Pin or Key available for the series of connector
you're using?

http://uk.farnell.com/jsp/search/browse.jsp?N=2031
+202548&Ntk=gensearch&Ntt=polarizing&Ntx=mode+matc hallpartial

Not on that list. These are the 0.1" pitch headers used on things sich as
disk IDE cables; the holes are tiny. I haven't been able to source any,

You can buy them with the hole missing.

and they'd probably cost a fortune.

Not when you buy them with the hole missing.