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

[pvharman at arach.net.au]

All,

I appreciate that we have been through this design loop before but my vote is 
that we don't use either connector. A simple Molex socket with just the number 
of pins that we need will future-proof the project for the day when the ATX 
connectors change again.  Making an adapter/chopping leads is easy.  

I appreciate that with the ATX connector we can remotely switch the PSU on/off 
but hooking into those two pins is easy.

Just my 2c worth.

73's  Phil...VK6APH 





Quoting Philip Covington <p.covington at gmail.com>:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> 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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> >
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