> struggling to get a good crimp on the 40-pin DIP IDC connector. My cheap
I just use a vice to crimp those.
I have one of those crimper tools but I tried to use it exactly once and
went back to the vice. Any little table top or clamp-on hobby vice.
Currently using a Panavice with plastic jaws. It's more fiddly doing the
dip connectors than the regular idc connectors, but not much more.
Maybe it's just that I did several of them while making up DVI cable kits.
One part of the 3-part version DVI cable kit is exactly that, just a
crimp-on dip40, no funky twisting each pair just a plain flat cable,
short cable just to reach to the rear of the machine, and male header,
producing the same connector and pinout as the T102, and then the rest
of the cable is the same for all 100 and 102 and 200.
I also glued a ribbon to the dip connector, in a closed loop, to pull it
out straight without bending the pins, without the user having to be
nearly as careful or aware.
Just grab and pull even vaguely in the right direction, and the
connector stays parallel while extracting just as a natural consequence
of the geometry or mechanics of the closed loop and the fact that it's
glued in place not free to slide. Even though you're pulling off-center,
even though one side or the other of the connector will always
neccessissarily break free slightly before the other, the loop ends up
preventing the connector from tipping left or right along the way.
--
bkw
On 9/20/20 4:49 PM, Jeffrey Birt wrote:
Well, the title is not exactly correct, but it conveys the general idea.
I was building b4me100’s M100-T102 test harness which he cleverly
designed to plug into the T102 SysBus connector. For the M100 if you
make up a DIP-40 to IDC-40 ribbon cable you wind up with the same pinout
as the T102 and it will plug into the test harness as well. I was
handheld crimp tool was not up to the task. Once I got a good crimp I
found trying to install/remove the DIP adapter difficult. What a silly
idea Kyocera had using a DIP socket as an expansion connector.
I made this little PCB to adapt the DIP40 socket to a standard 2x20 box
header. This allows using a simple straight through 40-pin ribbon cable.
With the cable plugged into the adapter it does stick down form the
bottom of the M100 but as it is for testing purposes, I don’t see this
as a major limitation. It is also a lot easier to install the remove.
I had a few made up by OSH park and can share the project if anyone want
to get some made for themselves. I’ll also be ordering from PCBWay in a
few weeks so if there is interest, I can add some to my order, it won’t
affect the shipping cost and that will make the boards very inexpensive.
Jeff Birt
--
bkw
