[hpsdr] [ATLAS] - proposed physical bus/pcb design 03March2006
Eric Ellison
ecellison at comcast.net
Fri Apr 28 05:51:33 PDT 2006
Phil
I was just looking at the board and it does not look like this was
implemented. I see VIA's but no header connector for bring light off the
board.
Thanks
Eric
-----Original Message-----
From: Philip Covington [mailto:p.covington at gmail.com]
Sent: Sunday, March 05, 2006 10:59 AM
To: Eric Ellison
Cc: Phil Harman; High Performance Software Defined Radio Discussion List
Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design 03March2006
Eric,
Can do... Good idea... I will add it to the list...
73 de Phil N8VB
On 3/5/06, Eric Ellison <ecellison at comcast.net> wrote:
> Phil
>
> Me the dummy!
>
> One question re the LEDS. Would it be possible to provide through holes on
> the diode bank for a dual .1 header so the LEDS could be brought 'off
board'
> to a front panel, at the same time leaving the smt option? Also add a pair
> for switching the power supply via the ATX connector?
>
> Thanks
> Eric
>
> -----Original Message-----
> From: Philip Covington [mailto:p.covington at gmail.com]
> Sent: Sunday, March 05, 2006 8:58 AM
> To: Eric Ellison
> Cc: Phil Harman; High Performance Software Defined Radio Discussion List
> Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
03March2006
>
> Hi Eric,
>
> The LEDs and power connectors are on sheet 7 of the schematic. Sheets
> 1-6 are for the corresponding slots.
>
> 73 de Phil N8VB
>
>
>
> On 3/5/06, Eric Ellison <ecellison at comcast.net> wrote:
> > Phil
> >
> > Even better. I wondered about the six pin! Thought it was for a switch
> etc.
> > This is even better! I looked for the resistors and leds on the
schematic
> > and J-18 but didn't see them.
> >
> > Looks like you have thought of everything!
> >
> > Eric
> >
> >
> > -----Original Message-----
> > From: Philip Covington [mailto:p.covington at gmail.com]
> > Sent: Sunday, March 05, 2006 7:58 AM
> > To: Eric Ellison
> > Cc: Phil Harman; High Performance Software Defined Radio Discussion List
> > Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> 03March2006
> >
> > Hi group,
> >
> > The six pin 0.100 header on the board was intended to provide an
> > alternate way of supplying power to the Atlas and plugged in boards
> > during the prototyping/testing phase. It also can be used as test
> > points to measure the voltages supplied by what ever is connected to
> > the ATX 20 or 24 connector. Personally, I intend to use clip leads
> > from my triple output bench supply for prototyping - the 6 pin 0.100
> > spaced header make that pretty easy. I don't need to supply the
> > voltages that I am not using on the bus during the prototyping phase.
> >
> > I had considered the need to limit the current available from the ATX
> > power supply, but quickly dismissed the idea because of the added
> > components and cost. That is how the other alternate power connector
> > came about.
> >
> > You can easily get the mating plug for the 20 or 24 pin MOLEX ATX
> > connector if you want to use a supply other than an ATX power supply.
> > Heck, you can even cut it off of an old ATX power supply. I don't see
> > why we should put some other MOLEX connector on the board other than a
> > 20 or 24 pin MOLEX (other than for saving space).
> >
> > I planned on posting a revised schematic and document today, but I am
> > going to hold off until we get the power supply connector issues
> > worked out.
> >
> > 73 de Phil N8VB
> >
> > P.S. They default of reply-to-sender instead of reply-to-list SUCKS!
> >
> >
> > On 3/5/06, Eric Ellison <ecellison at comcast.net> wrote:
> > > ***** High Performance Software Defined Radio Discussion List *****
> > >
> > > Phil
> > >
> > > I think you meant this to go to the list, even if not, your points are
> > well
> > > taken. No question that the current available from the ATX is
overkill.
> I
> > > was also sitting here thinking "Where are the fuses?".
> > >
> > > OTOH: I am pretty much a 'plug and play' person, and for the cost of a
> 10
> > > ohm 10 watt resistor, a switch, and a degree of caution, a standard
> > computer
> > > case with few modifications makes a pretty good 'end product'.
> > >
> > > Using a small molex connector on the MB 'mandates' power supply
> > > modification, even if only the cable.
> > >
> > > As usual I feel strongly ALL ways! (smile), also really like that
little
> > > pico supply!
> > >
> > > Thanks
> > > Eric
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Phil Harman [mailto:pvharman at arach.net.au]
> > > Sent: Sunday, March 05, 2006 5:45 AM
> > > To: Eric Ellison
> > > Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> > 03March2006
> > >
> > > Second take on the ATX connector.
> > >
> > > The boards that we attach to the Atlas bus are in many cases going to
be
> > > prototypes and development boards. There is the inevitable chance
that
> > > there will be circuit and operator errors. With a full blown ATX
power
> > > supply connected to the bus - that can provide may 10's of amps - such
> > > errors can be 'interesting' to say the least. ATX power supplies are
> > > intended to power production designs that are not subject to
tinkering.
> If
> > > we use a small Molex header then connecting up regulated and current
> > limited
> > >
> > > power supplies during the testing and development phases is very
simple.
> > >
> > > Since I don't see a high power PA being on of the six boards we don't
> need
> > > 10's of amps anyway. I'm not suggesting that we don't use ATX power
> > > supplies for a final and proven design - just not during the
development
> > > phases.
> > >
> > > I still support the case for a simple, small, Molex connector on the
> Altas
> > > bus.
> > >
> > > Phil...VK6APH
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Eric Ellison" <ecellison at comcast.net>
> > > To: "'Eric Ellison'" <ecellison at comcast.net>; <pvharman at arach.net.au>;
> > > "'Philip Covington'" <p.covington at gmail.com>
> > > Cc: "'High Performance Software Defined Radio Discussion List'"
> > > <hpsdr at hpsdr.org>
> > > Sent: Sunday, March 05, 2006 6:12 PM
> > > Subject: RE: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> > 03March2006
> > >
> > >
> > > > Second take
> > > >
> > > > If a solution to the 20 - 24 pin is not quick and simple just stay
> with
> > > > current design. It accommodates the slick little pico supply and is
> > KISS.
> > > > All the powers we need are on the 20 pin and Phil has allowed for
the
> > load
> > > > resistor etc. 20 pin supplies will be around for a long time.
Probably
> a
> > > > lot
> > > > longer than the life cycle of the Atlas. Future rev of the Atlas
when
> 24
> > > > pin
> > > > supplies are far more prevalent than 20 pin is probably a better
> route.
> > > >
> > > > 24 pin to 20 pin adapter cables are readily available.
> > > >
> > > > My second 2 cents. And vote. Really nice design Phil! Build it and
we
> > will
> > > > come!
> > > >
> > > > Thanks
> > > > Eric
> > > >
> > > > -----Original Message-----
> > > > From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On
> Behalf
> > > > Of
> > > > Eric Ellison
> > > > Sent: Sunday, March 05, 2006 4:17 AM
> > > > To: pvharman at arach.net.au; 'Philip Covington'
> > > > Cc: 'High Performance Software Defined Radio Discussion List'
> > > > Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> > > > 03March2006
> > > >
> > > > ***** High Performance Software Defined Radio Discussion List *****
> > > >
> > > > Phil
> > > >
> > > > Your design is so wonderfully flexible, in all ways, it seems a
shame
> > that
> > > > we should not be able to accommodate the two current standard
> connectors
> > > > in
> > > > some way, without having to hack the power supply. That would
probably
> > > > give
> > > > us 10 years, looking at the cycle for the 20 pin connector, change
to
> > 24.
> > > >
> > > > On board jumpers? Chris' suggestion of 2 connector provision?
> > > >
> > > > Thanks
> > > > Eric
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On
> Behalf
> > > > Of
> > > > pvharman at arach.net.au
> > > > Sent: Saturday, March 04, 2006 10:44 PM
> > > > To: Philip Covington
> > > > Cc: High Performance Software Defined Radio Discussion List
> > > > Subject: Re: [hpsdr] [ATLAS] - proposed physical bus/pcb design
> > > > 03March2006
> > > >
> > > > ***** High Performance Software Defined Radio Discussion List *****
> > > >
> > > > 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
> > > >> > _______________________________________________
> > > >> > HPSDR Discussion List
> > > >> > To post msg: hpsdr at hpsdr.org
> > > >> > Subscription help:
> > http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > >> > HPSDR web page: http://hpsdr.org
> > > >> > Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> > > >> >
> > > >> >
> > > >> >
> > > >> >
> > > >> _______________________________________________
> > > >> HPSDR Discussion List
> > > >> To post msg: hpsdr at hpsdr.org
> > > >> Subscription help:
> http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > >> HPSDR web page: http://hpsdr.org
> > > >> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> > > >>
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > HPSDR Discussion List
> > > > To post msg: hpsdr at hpsdr.org
> > > > Subscription help:
http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > > HPSDR web page: http://hpsdr.org
> > > > Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> > > >
> > > > _______________________________________________
> > > > HPSDR Discussion List
> > > > To post msg: hpsdr at hpsdr.org
> > > > Subscription help:
http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > > HPSDR web page: http://hpsdr.org
> > > > Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > No virus found in this incoming message.
> > > > Checked by AVG Free Edition.
> > > > Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date:
> 2/03/2006
> > > >
> > >
> > >
> > >
> > > --
> > > No virus found in this outgoing message.
> > > Checked by AVG Free Edition.
> > > Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date:
2/03/2006
> > >
> > > _______________________________________________
> > > HPSDR Discussion List
> > > To post msg: hpsdr at hpsdr.org
> > > Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> > > HPSDR web page: http://hpsdr.org
> > > Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> > >
> >
> >
>
>
More information about the Hpsdr
mailing list