[amsat-bb] Re: Questions about use of PC104 connector for CubeSat boards

Jonathan Wagner jonathan at jonathanwagner.net
Wed Nov 3 10:27:29 PDT 2010


I'm afraid there is no "golden standard." CAPE-1 used the PC104 connectors
also, but they were placed for convenience not by any standard. I believe
CAPE-2 is moving away from these in favor of a backplane design and I'm not
sure what other CubeSat programs are doing.

Jonathan Wagner

On Wed, Nov 3, 2010 at 11:30 AM, William Leijenaar <pe1rah at yahoo.com> wrote:

> Hello AMSATs,
> Work and home situation kept me away from having any ham time. But recently
> I
> had some time to continue with upgrading my LE005 transponder design with a
> PC104
> connector (or is it PCI-104 ?), and some other features ;-)
> The PC104 is a good choice for having a standarized inter connection system
> on
> CubeSat projects. However, I seen some deviation in the placement standard
> of
> this PC104 connector.
> >From the following website I read:
> http://www.cubesatkit.com/content/electronics/bus.html
> "The CubeSat Kit Bus utilizes the same physical connectors as the
> industry-proven
> PC/104 bus, but in an alternate physical location so as to avoid
> unintentional
> damage to PC/104 or CubeSat Kit modules."
> With my focus on: "...in an alternate physical location..."
> I would like to know what this possition is, and if this is now "the golden
> standard"
> in CubeSat world ?
> My next worry will be the pin configurations. Is there any standard for
> CubeSat
> boards ?
> Next I would like to know how modules are controlled by the data bus.
> Is it like separate pins for PTT, TX, RX etc...
> Or with more smart communication with lines like: address bus, data bus,
> Clock,
> Interrupt lines etc. (similar to old ISA PC cards)
> Or maybe with I2C.
> I keep it to these questions for now...
> Next questions will follow out of the answers hihi...
> 73 de PE1RAH
> William Leijenaar
> ---
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