[time-nuts] Form factor

[Bob]

Another (possibly bad) option is the old 22/44 pin .156" spacing card
bus. I don't know the official name of it, but there were many many
prototype cards and backplanes available for it in the day.

Yet another option would be to build these to fit in an existing
instrumentation chassis like the Tektronix 500/5000 series. That gives
you a predefined backplane, a form factor for cards, enclosures and
chassis available in several sizes with well regulated power supplies,
and perhaps additional audience.


On Dec 20, 11:14 pm, Bob <bow... at gmail.com> wrote:
> There has been some discussion about card form factor.
>
> The first question is do we design around a backplane, a stackable
> module form, or pick one module as the mainboard and plug everything
> into that.
>
> Eurocard has been one suggestion as a form factor. While I personally
> love Eurocard, the boards and connectors are expensive.
>
> Stackble connectors are a pain in assembly.
>
> Backplanes are inherently evil at high speeds.
>
> Plugging everything into one main board makes that a critical design
> item and that much harder to upgrade.
>
> Discuss. :)