[hpsdr] [ATLAS] - proposed physical bus/pcb design 03March2006

[Philip Covington]

Hi Chris,

Thanks for the link to the spec and the data sheet.

Ken N9VV also sent me a link to the ATX 2.2 spec which describes the
24 pin connector.

I guess the big question now is whether we should stick with the 20
pin connector, go with the 24 pin connector, or put both on the board?

I am in the process of adding the daisy chain bus requested by Lyle so
I can change or modify the connector arrangement also.  With 3 lines
on the XBUS and 3 lines on the YBUS used for the daisy chain, that
leaves us with an XBUS of 24 lines and a YBUS of 24 lines.   I did not
like the connector reference designator progression either so I have
fixed that.

73 de Phil N8VB


On 3/4/06, Christopher T. Day <CTDay at lbl.gov> wrote:
> Phil,
>
> My attached message gives the Mouser part number I found for the 24-pin
> version. I found it by looking for a match to what is specified for the
> plug in the ATX V2.2 Motherboard spec
> <http://www.formfactors.org/developer/specs/atx2_2.pdf>. Here is the
> data sheet for the header on the Mouser site:
> <http://www.molex.com/pdm_docs/sd/039281243_sd.pdf>. Is this enough
> info?
>
> Unfortunately, I think this header is not pin compatible with the 20-pin
> version; the latch is in the wrong place and the pin across from #8 is
> NC instead of -5VDC as specified for the 20-pin connector in the ATX
> v2.1 spec
> <http://www.formfactors.org/developer/specs/atx2_1.pdf>
> I now have the picoPSU supply which is not modifiable to 24-pins, so I'd
> be happy with the Atlas board as is.
>
>
>         Chris
>
>
> -----Original Message-----
> From: Philip Covington [mailto:p.covington at gmail.com]
> Sent: Saturday, March 04, 2006 3:22 PM
> To: High Performance Software Defined Radio Discussion List
> Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> 03March2006
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> On 3/4/06, Eric Ellison <ecellison at comcast.net> wrote:
> > Phil
> >
> > Fantastic. Many great ideas here. I really like the inclusion of all
> > voltages for experimenters! We had talked about using the new 24 pin
> ATX
> > connector which is apparently compatible with the current 20 pin
> connector.
> > This would allow for the future of the newer power supplies included
> with
> > future computer enclosures.
> >
> > Are you doing this in Kicad? If so can we get a holt of the project
> files?
> >
> > Thanks
> > Eric
>
> Hi Eric,
>
> I could not find a specification or reliable source of information
> concerning the pin out of the 24 pin connector mentioned.  Anyone?
>
> 73 de Phil C
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