> Am 07.12.2019 um 14:05 schrieb H. Nikolaus Schaller <h...@goldelico.com>: > > >> Am 07.12.2019 um 13:35 schrieb Paul Boddie <p...@boddie.org.uk>: >> >> On Saturday 7. December 2019 08.37.23 H. Nikolaus Schaller wrote: >>> I just came across: >>> >>> https://www.crowdsupply.com/eoma68/micro-desktop/updates/measurements-and-a-> >>> hypothesis >>> >>> So they also ran into unexpected solder bridges which must be X-Rayed. This >>> sounds very very familiar to me... >>> >>> With our experiences collected in the GTA04 project many years ago, I think >>> it is easy to fix - if you have enough money or can borrow money to make >>> some costly experiments with the production line setup. >> >> I mentioned on the arm-netbook mailing list that similar problems were >> experienced before, albeit with the RAM chips: >> >> http://rhombus-tech.net/ingenic/jz4775/news/EOMA68-jz4775_XRay_Photos/ >> >> So, I thought that the manufacturer might have built up some experience >> since >> then. From the latest update, it sounds like this is a production process >> problem, with the prototypes having been made without issues, so I guess >> that >> the matter of soldering the chips is not a fundamental problem but just >> something that needs to be done correctly in the production environment. > > Yes, exactly the same issue we had with the GTA04. We knew that Nokia had > built millions of phones incl. the N900 using the OMAP3 + PoP memory but > failed.
I think this sentence could be misunderstood. Nokia had successfully built millons of phones using the OMAP3 + PoP memory. And we failed with the same. > > Then we got a manufacturer who adapted and learned how to properly produce > them on their line. > > Then, OpenPandora switched from omap3530 to dm3730 (like we aready had) and > had only failures. Finally their production line learned how to produce them. > > And then we did go to the same production line as the 1GHz OpenPandora > with the GTA04A5 - and they failed. Almost. Well approx. 30% yield which > was too low. We tried to optimize, but the GTA04A5 project did run out of > money. > >> >> (I wouldn't know what the difference between the pre-production and >> production >> environments are in this case. There were also some other production-related >> issues around board-edge component assembly, if I remember correctly.) >> >>> But borrowing money requires a business model which promises future >>> revenues. >>> >>> Without money it needs a lot of creativity and time to replace the missing >>> money. >> >> I think that these experiments rely on a helpful and rather generous factory >> owner who is looking to gain experience in the processes involved. > > Indeed. Or a big enough budget to pay for his experiments. > > I think I now quite precisely know what did go wrong with the GTA04A5 but it > would have cost several 1000€ to run another experiment. And it could have > failed again. > >> >>> Which leads to delay and delay and finally the product is working but >>> obsolete and only the brave initial sponsors remain. So there is nobody >>> following up the initial funding round. >> >> Certainly, things have become a lot quieter around the EOMA68 initiative, >> and >> there are people who have probably lost interest and do not expect to see >> anything come out of it. >> >> I have probably made a point about technological projects many times to >> anyone >> who might listen, reflecting on my own observations and experiences as well >> as >> what is already common knowledge, that the longer an uncompleted project >> takes, the less likely it will be realised. > >> Factors include the finances (as you mention above) plus technological >> progress (making a product less attractive over time) and obsolescence >> (components becoming unavailable and technologies becoming unsupportable). >> Keeping a project short reduces the exposure to such risks. > > Exactly. And that's the big challenge to keep the project duration short and > to do something very complex. All the projects we're talking about here are > at the level of the highest industry league, but are run by enthusiasts with > far too little budget. So we can only admire everyone who takes the challenge > and still tries to win (contrary to me - everyone is getting older). > > BR, > Nikolaus > > _______________________________________________ > Community mailing list > Community@tinkerphones.org > http://lists.goldelico.com/mailman/listinfo.cgi/community > http://www.tinkerphones.org _______________________________________________ Community mailing list Community@tinkerphones.org http://lists.goldelico.com/mailman/listinfo.cgi/community http://www.tinkerphones.org
