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Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad

To: Xylo-SDR Discussion <xylo-sdr@lists.ae5k.us>
Subject: Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
From: Philip Covington <p.covington@gmail.com>
Date: Sun, 15 Jan 2006 13:16:13 -0500
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Reply-to: Xylo-SDR Discussion <xylo-sdr@lists.ae5k.us>

Eric,

I agree with Cecil:  Let's start talking in mm or cm instead of inches
because it is too confusing - unless you really are intending it to be
4"x4" and not 100x100mm...

73 de Phil

On 1/15/06, Eric Ellison <ecellison@comcast.net> wrote:
> Phil
>
> Thanks
>
> Designer Group: Be forwarned or speak your peace. Project board size is now
> 4"x4" with buss connector opposite 'external real-world connections'
>
> Leon - Don't forget some status leds and perhaps a PB (reset?).
>
> I will probably go for a $200 +/- an order for 4.5 inch enclosure the .5
> inch used for standoff adjustment of the motherboard. I am told by the
> distributor that this item is due 1/20/06 so will have to wait several days.
>
> I will keep everyone informed.
>
> In the meantime, I think we should have a discussion on the motherboard buss
> division of power, what kind of power?, dedicated lines for board
> interconnects, dedicated lines for FPGA interconnects etc. Someone please
> start this on an appropriated thread topic.
>
> Eric
>
> -----Original Message-----
> From: xylo-sdr-bounces@lists.ae5k.us [mailto:xylo-sdr-bounces@lists.ae5k.us]
> On Behalf Of Phil Harman
> Sent: Sunday, January 15, 2006 6:05 AM
> To: Xylo-SDR Discussion
> Subject: Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
>
> Hi Eric,
>
> Thanks for doing all this research. I think your proposal is fine and I
> support it.
>
> 73's  Phil....VK6APH
>
>
> ----- Original Message -----
> From: "Eric Ellison" <ecellison@comcast.net>
> To: "'Xylo-SDR Discussion'" <xylo-sdr@lists.ae5k.us>
> Sent: Sunday, January 15, 2006 2:12 AM
> Subject: Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
>
>
> > Phil and Everyone
> >
> > I have Googled till I gurgled. I have a change of plan to propose,
> > regarding
> > enclosure, since there has been a lot of discussion on number of  buss
> > connector slots, board dimensions, descrete component mounting, like gps
> > satellite receiver subsystem board etc. There is no question in my mind
> > that
> > EuroBus 3U design is the way to go, since there is a LOT of off the shelf
> > stuff for it, even power supplies.
> >
> > I really could not find a 'stock' enclosure with enough height for
> > horizontally mounted boards, which really meet our requirement. Also Phil
> > N8VB wants to start design, so 'dropped back' and thought again about the
> > mount.
> >
> > I got quotes from my local Rose+Bopla rep for Aluminum extrusions I posted
> > before.
> >
> >
> http://www.rose-bopla.com/PMX/RSBPCatg.nsf/65680fe57e02219d85256bbc00506958/
> > e5046498ec7af42885256bdc00516cdc?OpenDocument
> >
> >
> > Minimum order is only $100, they can cut the extrusion for $2.00 a cut.
> > Other services are available.
> >
> > The end plates unfortunately are prohibitively priced. 1 dust proof end
> > plate cost more than a  4x6x6 enclosure. However I feel that it will be a
> > cinch to make our own end plates, perhaps out of single or double sided
> > circuit board material or aluminum in a 4x6 configuration.
> >
> > Proposal:
> >
> > I propose that we go for the Rose-Bopla 4x6x(X) enclosures The length
> > dimension will allow mounting the motherboard on an aluminum backpanel
> > with
> > standoffs with a little 'easment' for getting the MB perfectly aligned
> > with
> > the slots in both the x and y dimension. Project boards would be
> > vertically
> > mounted, sliding in from the front. If we have 4 motherboard slots, we
> > have
> > approximately 3 inches for other slide in cards not buss connected, like
> > power supplies.
> >
> > NOW! ????
> >
> > We could go with (X) being 2+ inch giving us the "2X4" which is our board
> > design suggestion.
> >
> > Obviously X can be any depth enclosure so project board size so we can
> > renegotiate the 2x4 standard.
> >
> > Or we could make the enclosure a standard Eurocard depth of 6 inches and
> > mount the project card of any length up to 6" on an inexpensive standard
> > 4x6
> > inch blank circuit board (About $2 for blank 4.x 6 cards).
> >
> > The drawback to this suggestion is that we would then have to come off
> > board
> > with any front panel mounted devices from the 4" by variable length
> > project
> > board. Also the connectors would have to be bulkhead mounts. Project
> > boards
> > would have to have patch cables to the front panel, which probably is not
> > pretty for stuff like USB, RF etc.
> >
> > I therefore propose that we increase the proposed project card size from
> > 2x4
> > to 4x4 which is a 'happy medium' which Phil suggests below. This also
> > allows
> > for Phil - VK6APH BPF board, A Jupiter GPS receiver etc. For 'Dead Bug'
> > expeimenters like Bill - KD5TFD, he could use a 4x6 full length card and
> > have 2" sticking out the front for experimenting without a card extender.
> > It
> > also allows us to get on with Motherboard design with a maximum vertical
> > dimension of 96 mm. (case height between lands). I propose the motherboard
> > height dimension be the the size of the 96 pin mating connector (3.7").
> > The
> > holes in the connector will mate with standoffs for rigidity.
> >
> > I think a 4x6x4 enclosure would make a cute little radio!
> >
> > Enclosure Cost without end panels on a 4x6x4+ case would be about:
> > 11 dollars. Nice dustproof Endcover when everything is finally plugged in
> > (If ever) is 15 dollars. Gives us the flexibility to be an 'anything'
> > device.
> >
> > WATSA?
> > Eric
> >
> > -----Original Message-----
> > From: xylo-sdr-bounces@lists.ae5k.us
> > [mailto:xylo-sdr-bounces@lists.ae5k.us]
> > On Behalf Of Philip Covington
> > Sent: Wednesday, January 11, 2006 9:49 PM
> > To: Xylo-SDR Discussion
> > Subject: Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
> >
> > Eric,
> >
> > Yes, if you could come up with a simple drawing of the board positions
> > and how you want to fit it into a case it would help a lot.  Then we
> > can see whether we can arrange things within the limits of the
> > motherboard size of approx 4 x 4".  I checked tonight and it looks
> > like a 4 layer 4x4" PCB would be about $25/ea in a batch of 25 boards.
> >
> > I would like to get this pinned down because I want to get started on
> > a LTC2208 2x4" format board.
> >
> > As far as no active components on the motherboard:  I think we should
> > have a smt LED for each of the power buses on the motherboard.
> >
> > 73 de Phil N8VB
> >
> > On 1/11/06, Eric Ellison <ecellison@comcast.net> wrote:
> >> Phil
> >>
> >> Spectacular! I advocate Kicad! If we could import the parts it is BETTER
> >> than Eagle. (smile).
> >>
> >> I'll try to get a 'picture' of the MB. I would like to keep the 2x4
> >> design
> >> for the front mounted components and add 1 4x4 board to the rear to
> >> accommodate larger parts such as Phil's BPF board, and have the rear
> > mounted
> >> board have access to the buss, although not necessarily many of the
> >> connections. The rear facing board would have the power supply, antenna
> >> connections facing rearward.
> >>
> >> Eric
> >>
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: xylo-sdr-bounces@lists.ae5k.us
> > [mailto:xylo-sdr-bounces@lists.ae5k.us]
> >> On Behalf Of Philip Covington
> >> Sent: Wednesday, January 11, 2006 7:14 PM
> >> To: Xylo-SDR Discussion
> >> Subject: Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
> >>
> >> On 1/11/06, Eric Ellison <ecellison@comcast.net> wrote:
> >>
> >> > Stupid question. Is it possible to mount one 96 pin staggered connector
> > on
> >> > the back of the Motherboard. My dyslexic mind can't figure it. Are all
> > the
> >> > traces on plated through holes in 2 planes.
> >>
> >> Don't know what you mean here.  Can you make a drawing of what you are
> >> proposing?
> >>
> >> > Kicad posted a new version in the last few days. Someone on the forum
> >> > contributed a parts designer. Drill stuff was apparently solved in a
> >> > December (or earlier) release. I'm back to Kicad, it REALLY IS an
> > elegant
> >> > program. There is an Oracad translator but didn't see if this was for
> >> > 'parts' or schematics or what. I didn't see an Eagle .lib translator,
> > but
> >> > that WOULD be great!
> >>
> >> There is.  It is called exp-kicad-lib.ulp
> >>
> >> http://www.philcovington.com/BAK/exp-kicad-lib.ulp
> >>
> >> You have to run it from inside Eagle as a user language program.  It
> >> will export the libraries in Kicad format.
> >>
> >> Also,  I am able to know compile Kicad on Windows (I could only
> >> successfully compile it under Linux before) so if anyone is interested
> >> I can tell you what I did to get the enviroment set up to compile it.
> >>
> >> 73 de Phil N8VB
> >>
> >> >
> >> >
> >> > Eric
> >> >
> >> >
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References:
- Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
  - From: "Phil Harman" <pvharman@arach.net.au>
- Re: [Xylo-SDR] Questions - Enclosure - MB - Kicad
  - From: "Eric Ellison" <ecellison@comcast.net>

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