Alan B. Pearce wrote:
> However a Eurocard is 100mm (4") wide, by 160mm (nominally 6") long,

That's about the size I was envisioning anyway.

> The DIN connector is a 3 row 0.1" pitch normally 64 pin long, but 32 pin
> long versions are also available. This is across one end of the PCB.
> Checked the connector, and I put the wrong DIN number sorry, the
> correct one is 41612.

I typed this into DigiKey and found only one DIN connector.  It was straight
out from the PCB and had two rows of 32 pins.  That doesn't sound like what
you're talking about since you want a right angle connector if I understand
it correctly.  Can you give me a pointer to the datasheet for the exact
connector you would like this board to take?

I guess this would take up 6 columns of pads on the right side of the board.
Three for the connector itself, and another three to wire to from on the
board.

> http://www.jrmiller.demon.co.uk/products/mod96.html has a picture of a
> typical Eurocard, with the DIN connector pads on the right hand end (the
> area marked PL on the silk screen).

I noticed that doesn't show the connector itself.  I assume its right angle,
but can't tell from the picture whether it would be male or female.

> As these pads are on a 0.1" x 0.1" grid if someone wants to fit a pin
> header to connect to ribbon cable IDC connectors, these same holes suit
> that purpose.

That's a good point which helps justify the rather large board area for this
feature.  Wouter could fit 2 or 3 of his connectors onto the same pad area,
plus many other connectors with .1" pin pitch become possible.

How important is it to have all 3 rows or would 2 rows of 32 be sufficient
for this purpose?  I can't see this board requiring that much I/O.  After
all, there are only 100 uncommitted nets on the prototype area and the PIC
only has 28 pins total.

> a Eurocard would also fit the sort of use you envisage - one off
> projects that would be installed somewhere. Having a one off type CPU
> card that could go in a development system consisting of a Eurocard
> cardcage would be real useful.

I see what you're saying.  I guess these things are more popular in Europe.
They might be more popular here if they weren't called "Eurocard".  Whoever
came up with that failed marketing 101.


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