Lol. Ok. You're added to the group. I've started a topic on form factor.
Bob On Mon, Dec 20, 2010 at 10:45 PM, Don Latham <[email protected]> wrote: > Hi benevolent dictator. Please not the @#$%^& Eurocard. As you say, the > connectors and backplane cost more than the stuff on the cards (except > maybe the stuff from Hittite :-). Rather a stack of cards with .1 in. > spacing .025 pins? That way, we can put the stack in any housing we want. > If a suitable processor card (e.g. propeller or Arduino) is selected, > daughterboards can be stacked on that. > Just thinkin'. I've joined the google group. > Best, > Don > > Bob Bownes > > Well said Chris. Take a look at the initial spec in the OpenCounter Gogle > > group and tell me what you think with respect to your item #1. I think > the > > core counter is going to be the really difficult part of the module list. > > > > Item #2 is going to be a tough one methinks. I love Eurocard, but, as you > > say, it is very expensive, if only for the connectors. In cases like this > > I'm a fan of either repurposing commercially available connectors (PCI > and > > memory DIMMS are two I have used in the past) because they can be a) > > purchased off the shelf, b) are manufactured in enough volume to make > > cheap, > > and c) are common enough that the really cheap amongst us can get them > off > > of scrap boards someplace for little or nothing. The N2PK VNA is built to > > fit into a particular HAmmond enclosure that I like but again, there are > > many options. My feeling is that the enclosure should not dictate any > > functional design decisions. > > > > #3 - I've created a group and appointed myself benevolent dictator. We > can > > discuss things, propose designs or design criteria, call for a concensus, > > accept, and draft volunteers to design that section to the defined spec. > > If > > there are multiple competing designs, so much the better, as long as we > > all > > agree on the interfaces. Sound like a process? Can you tell I've done > this > > once or twice? :) > > > > Step one will be to agree on the overall functional spec. If we get > enough > > participants, I'd like to nail that down by mid January. The next step is > > to > > agree on the interfaces between the modules. Same process, discuss, > > propose, > > draft, get concensus, close and move on. > > Then we get folks working on the individual modules. > > > > > > On Mon, Dec 20, 2010 at 8:43 PM, Chris Albertson > > <[email protected]>wrote: > > > >> On Mon, Dec 20, 2010 at 2:51 PM, Dave M <[email protected]> > wrote: > >> > > >> .. never got off the launchpad because of their inability to come to > >> > consensus on a set of features. I had to conclude that too many cooks > >> > spoiled the broth. Everyone that had input to the project was > >> unwilling > >> to > >> > yield on anyone else's ideas. Hopefully, our project won't degrade > >> into > >> > another such fiasco. > >> > >> > >> THAT is the number one problem to solve. Technical issues are easy > >> > >> I think the solution is to > >> (1) chop the project up into small enough parts, each on it's own PCB > >> so that each part is "easy" and has some wider user outside the > >> project. > >> (2) Find a mechanical standard so all the PCBs can be mounted in some > >> kind of chassis. I'm thinking now that maybe a 160-3U Eurocard would > >> be about right size. But the parts are expensive. > >> (3) Need some sort of design process that allows everyone to > >> contribute. And everyone can. Projects always are lacking technical > >> writers and quality control people > >> > >> Of those a "process" and "mechanical standard", I think are the > >> hardest. We always give managers a hard time but that is what is > >> needed. The person who will make this happen will be a manager and > >> organizer maybe not a designer. > >> > >> > >> -- > >> ===== > >> Chris Albertson > >> Redondo Beach, California > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > -- > "Neither the voice of authority nor the weight of reason and argument are > as significant as experiment, for thence comes quiet to the mind." > R. Bacon > "If you don't know what it is, don't poke it." > Ghost in the Shell > > > Dr. Don Latham AJ7LL > Six Mile Systems LLP > 17850 Six Mile Road > POB 134 > Huson, MT, 59846 > VOX 406-626-4304 > www.lightningforensics.com > www.sixmilesystems.com > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
