Re: [Xylo-SDR] Eurocard Cyclone II PCB

["Tom" <w0kgw@citlink.net>]

always ran +bus on one side the common down the middle and the -bus one pin 
in for swapping the board at the wrong end for end to keep from burning out 
something maybe this will help with the power busses.
tom w0kgw

----- Original Message ----- 
From: "KD5NWA" <kd5nwa@cox.net>
To: "Xylo-SDR Discussion" <xylo-sdr@lists.ae5k.us>
Sent: Sunday, January 08, 2006 11:48 AM
Subject: Re: [Xylo-SDR] Eurocard Cyclone II PCB


> I would recommend the power traces be on the outside edges of the
> connector specially the ground so on boards that are two layers the
> traces can be much wider than three pins.
>
> At 08:32 AM 1/8/2006, you wrote:
> > Leon
> >
> > Great! You might want to poll the group of how many and which pins to make
> > intra board and how many and which to make I/O from the FPGA. I guess the
> > power traces should be doubled along the edge. I'll leave that up to you
> > guys.
> >
> > Eric
> >
> >
> > -----Original Message-----
> > From: xylo-sdr-bounces@lists.ae5k.us 
> > [mailto:xylo-sdr-bounces@lists.ae5k.us]
> > On Behalf Of Leon Heller
> > Sent: Sunday, January 08, 2006 2:03 AM
> > To: Xylo-SDR Discussion
> > Subject: [Xylo-SDR] Eurocard Cyclone II PCB
> >
> > I'll do it!
> >
> > I'll order some of the 96-way connectors and a couple of FX2 chips 
> > tomorrow,
> >
> > so I can check the footprints. I've already got the Cyclone II chips, but 
> > I
> > need to get some of the configuration chips, as well.
> >
> > I've got the 96-way straight and right-angle connectors in the Pulsonix
> > library.
> >
> > I'll use a four-layer board. There is no point in cutting corners and 
> > it'll
> > be much easier to design, as well as cutting down on emissions. As most of
> > the connections will be to the DIN connector, I'll save a lot of time by
> > using the autorouter on them. I might as well put a 24.576 Mhz oscillator 
> > on
> >
> > the board, feeding one of the FPGA clock inputs and brought out to the
> > connector, to save having one on the ADC board, as well as a 50 MHz
> > oscillator. I've had my Flex board running at 125 MHz, so we could got a 
> > lot
> >
> > faster.
> >
> > 73, Leon
> > --
> > Leon Heller, G1HSM
> > leon.heller@bulldoghome.com
> > http://www.geocities.com/leon_heller
> >
> > _______________________________________________
> > Xylo-SDR mailing list
> > To post msg: Xylo-SDR@ae5k.us
> > Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> > Xylo-SDR web page: http://xylo-sdr.ae5k.us
> > Forum pages: http://www.hamsdr.com/hamsdrforum/
> >
> > _______________________________________________
> > Xylo-SDR mailing list
> > To post msg: Xylo-SDR@ae5k.us
> > Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> > Xylo-SDR web page: http://xylo-sdr.ae5k.us
> > Forum pages: http://www.hamsdr.com/hamsdrforum/
>
>
> Cecil Bayona
> KD5NWA
> www.qrpradio.com
>
> "I fail to see why doing the same thing over and over and getting the
> same results every time is insanity: I've almost proved it isn't;
> only a few more tests now and I'm sure results will differ this time ... "
>
> _______________________________________________
> Xylo-SDR mailing list
> To post msg: Xylo-SDR@ae5k.us
> Subscription help: http://lists.ae5k.us/listinfo.cgi/xylo-sdr-ae5k.us
> Xylo-SDR web page: http://xylo-sdr.ae5k.us
> Forum pages: http://www.hamsdr.com/hamsdrforum/