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<ryan25> hi all, just came across the neo900 project after reading about my old trusty n900... is the project still moving forward? I'm unable to join the newsletter list...
<Joerg-Neo900> the newsletter list is obsolete since we don't send out newsletters often, thanks to lack of manpower for writing them.
<Joerg-Neo900> yes, recently great houkime resumed on layout
<Joerg-Neo900> so, while not in best shape, the project isn't dead yet
<ryan25> well I hope to see it come to fruition, it's a very cool project. is the issue more a lack of engineers or of funding? I'm fairly confident I'd purchase a circuit board to mod my device if I were able to
<Joerg-Neo900> well, both
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<Joerg-Neo900> we didn't reach the needed number of preorders which limited available funds severely, Same time it's pretty difficult to find engineers feeling confortable with using KiCad for such a project
<Joerg-Neo900> then we had bad luck that caused some of the users in here to suspect that the project must be cursed
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<Joerg-Neo900> ryan25: you noticed our "resources" tab?
<Joerg-Neo900> and also see /topic
<Joerg-Neo900> Werner's talk still prolly is the best info we ever produced
<Joerg-Neo900> though our schematics are also nice, and the whitepapers as well
<ryan25> cool, I will check it out. I have some electrical engineering experience (more than enough to make it through/understand schematics and whitepapers) but probably not enough expertise to be of any help
<ryan25> has the block diagram in the 2015 talk pdf been updated or revised at all?
<ryan25> nevermind, I see it in the resources
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<ryan25> werner's talk is no longer available on youtube, just fyi. may I request that the twitter account send out major updates when they happen? I'll try to check in on the project every so often but I don't want to miss the opportunity to order a board once the project gets to that point
<Joerg-Neo900> hmm, I'm not sure it ever was on youtube
<Joerg-Neo900> twitter is defunct
<Joerg-Neo900> for us at least
<Joerg-Neo900> we probably will have fw if any NeoN boards for sale, we are limited to build to order
<Joerg-Neo900> few*
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<Joerg-Neo900> the business idea is that customers finance R&D and production
<Joerg-Neo900> see >>[2018-04-09 Mon 06:58:47] <Joerg-Neo900> we didn't reach the needed number of preorders which limited available funds severely...<<
<ryan25> right
<craftyguy> i would love to pre-order, but having to do a bank wire transfer is hugely expensive (~10% of the order).
<Joerg-Neo900> we're aware, it's a pita
<ryan25> I guess I'm just hesitant to place a partial order now since I'm not in a financial position to be able to be down 400 euro without guarantee of delivery
<ryan25> oh does it also need to be a bank wire transfer?
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<craftyguy> it's not so much the total cost, but the fact I have to pay extra for dumbass banks to shuffle money around. I would have no problem paying order cost + 10% if it went to this project
<Joerg-Neo900> PayPal gave us a hard time and we never managed to recover that service
<craftyguy> yea paypal sucks too. maybe stripe?
<Joerg-Neo900> we tried all known alternatives, none panned out
<Joerg-Neo900> only thing lacking: automatic BTC payment processor
<craftyguy> Joerg-Neo900: lacking from stripe?
<craftyguy> or just in general
<Joerg-Neo900> lacking from the list of tested alternative payment methods
<craftyguy> ah, ok
<Joerg-Neo900> I'd love to offer BTC payment, but only if it doesn't need manual processing
<Joerg-Neo900> and works with German bank to transfer funds to there automatically once a week at least
<craftyguy> what was the problem with stripe? I only ask because things like fosspay (https://github.com/SirCmpwn/fosspay) seem to have no problem using it
<craftyguy> 3% is a lot less than (at least) 10% for a wire transfer :)
<Joerg-Neo900> well, we planned to start a kickstarter to drum up the missing preorders, once we have a proto_v2 to show off, and there I guess PP would be an option
<Joerg-Neo900> oooh stripe, can't recall. Transferwise refused to accept us as payment receiving customers
<craftyguy> just please don't go with kickstarter.com for that :P
<Joerg-Neo900> two times, without further explanation
<craftyguy> that's lame. anyways, I just chimed in because I really (really) want to give y'all money, but I really (really) don't want a good portion of it to go to someone else.
<ryan25> has metacollin returned from his family emergency? hope all
<ryan25> all's well...*
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<Joerg-Neo900> alas no
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<ryan25> oh no :( I hope they can return soon
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<houkime> is BOB hel in place only by connectors or there's sth else?
<houkime> *held
<houkime> also, how accurately hb.pdf needs to be followed in terms of edge cut geometry?
<houkime> currently there are small deviatons here and there like 0.1 mm, and it looks like the legacy N900 type of thing.
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<houkime> looks like it needs to be strict. I will actually make two marks for usb OTG for future use.
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<houkime> these BOB-lower interconnectors are huge and there are 2 of them. I'm not entirely sure it is possible to place them ok given that, for a second, there's a USB port very near on the LOWER but I will try.
<houkime> metacollin did some layout in that region, not really sure what he was thinking about.
<Joerg-Neo900> ((is BOB hel in place only by connectors)) yes
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<Joerg-Neo900> ((how accurately hb.pdf)) very, for the position of connectors etc, outline/edgecut however is not strictly defined for BoB in N900
<Joerg-Neo900> 0.1mm is tolerable
<Joerg-Neo900> yeah, the OTG pogopin halfbays in BoB are missing afaik
<Joerg-Neo900> hackerbus was not a thing yet in proto_v1
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<houkime> bob connector footprints don't fit into hb-specified 17 mm. They are 17.5
<houkime> thereby they can't fit on bob as it is specified in hb.
<Joerg-Neo900> hmm, in gb.pdf werner went to epic length about the footprints. I tend to assume he's right
<Joerg-Neo900> hb.pdf
<Joerg-Neo900> you basically just have to copy his fotprint design from hb.pdf to kicad
<Joerg-Neo900> if *then* there's still a problem, then that's a real one
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<houkime> well they technically fit if we omit courtyards and solder mask stuff.
<Joerg-Neo900> can we do this, in this particular case?
<Joerg-Neo900> I mean, solder stop at least shouldn't be an isse when PCB stops instead ;-D
<Joerg-Neo900> issue*
<Joerg-Neo900> for courtyards, what are the requirements? Depending on reflow process?
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<Joerg-Neo900> told you we already used very minimal courtyards in our calculations and still have a density of iirc 70%
<Joerg-Neo900> there will be challenges for sure. Possibly some stuff tirns out to be impossible all together
<houkime> Courtyards themselves are mostly for pick-n-place (which cannot be 100% accurate) and repairmen to have some room. There are bad effects of the edge itself for a pad as I remember. Rechecking IPC.
<Joerg-Neo900> in that case we will give schematics another spin, even product property specs
<Joerg-Neo900> worst case it may turn out hackerbus isn't feasible - or any other feature
<Joerg-Neo900> though we did our best to do a comprehensive feasibility check on schematics level also for placement and density etc
<houkime> I don't think it will be needed even if clearance is a must. There's a little bit of flexibility in BOB geometry itself.
<Joerg-Neo900> yes
<houkime> at the end of the day, we produce the BOB, and it can be adjusted as long as the case supports it.
<Joerg-Neo900> yes
<Joerg-Neo900> apropos PnP, how are those damn B2B conns placed? do they have a suction cup cover?
<Joerg-Neo900> or a flat area for that
<Joerg-Neo900> or do they need sort of "tweezers" grabbing them sideways?
<Joerg-Neo900> re reflow, I assume we will opt for VPS
<Joerg-Neo900> should be better for the huge modem module anyway, also less hassle with shadowing in our very dense PCBA
<Joerg-Neo900> a pity we didn't employ JTAG boundary scan
<Joerg-Neo900> but somehow the design doesn't really lend itself to it
<Joerg-Neo900> I might revisit OMAP3 B-S properties, and which pins we need exposed to attach the JTAG to
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<Joerg-Neo900> dang cable :-S
<Juesto> welp
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<Joerg-Neo900> luckily I got a failover to DSL
<Joerg-Neo900> and since this is a convenient moment for test, I'll check PIA VPN if it is resilient to route changes
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<Joerg-Neo900> this didn't work as expected
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<Joerg-Neo900> [notice] I'm not (really) available from 11th to 13th
<Joerg-Neo900> after black friday ;-) I'm probably 80% online again
<sicelo> who's that?
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<Joerg-Neo900> who's what?
<sicelo> that sent a notice
<Joerg-Neo900> err, me? do you think this can't be me since I'm never offline? ;-)
<sicelo> *sigh of relief* - thought one of Neo900 team was about to go MIA as well
<sicelo> coupled with you "this didn't work as expected" message :p
<Joerg-Neo900> ooh, sorry
<Joerg-Neo900> unrelated
<Joerg-Neo900> >>this didn't work as expected<< was about OpenVPN failing to keep/re-establish connection when transport (internet route) changed
<sicelo> yeah i figured out now :)
<Joerg-Neo900> I had hoped it did
<Joerg-Neo900> actually I hope to relax and take care about my health a bit - over due since almost a year now
<Joerg-Neo900> I will still be online but not as active as usual
<Joerg-Neo900> IOW only 8h per day, and mostly for job
<sicelo> ok. i guess that's how much time the majority of us spend online
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<sicelo> anyway, nite. i'm long overdue for bed
<Joerg-Neo900> o/
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<houkime> IPC 221B says that 1.5 mm from the edge is required "to allow for component placement, soldering, and test fixturing"
<houkime> *2221B.
<houkime> this does not apply to edge contacts (like gold-plated) probably because they are not soldered.
<houkime> as a workaround if absolutely needed, removable board tabs are used
<Joerg-Neo900> what are "removable board tabs"?
<houkime> breakout things
<houkime> stuff that you cut away or chip away
<houkime> this way you can make an edge on the postprocessing step.
<houkime> you make a board a bit larger, and then cut.
<houkime> it is not an ideal process though, cause blades have their thickness.
<houkime> kinda needs calculations.
<houkime> As an alternative we can trade some geometry or make a bit non-normative footprints (it is shield contacts that are messing with stuff)
<Joerg-Neo900> sure, we will use that
<houkime> yeah, it is kinda how BOB was created the first place.
<Joerg-Neo900> watch the ultra-convenient fixation holes in the tabs, to make sure the PCB is in a defined position during PnP
<houkime> you can see that on this image there is a pad right on the edge of BOB
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<houkime> but this edge pad is near the center of the BOB and so everything is fine. Sort of.
<houkime> it is in the neck area.
<houkime> However because we need edge pads on the other sides too
<houkime> we will need to add one more tab.
<Joerg-Neo900> np
<Joerg-Neo900> industry does that all the time
<Joerg-Neo900> and cutting is done with laser either, or you get V-trenches to break off the tabs
<Joerg-Neo900> makes sense?
<houkime> there're are worrying things abot this pad though.
<houkime> If you look closely it doesn't have clearance around it
<houkime> and it has another color.
<Joerg-Neo900> I don't have a display of it
<Joerg-Neo900> rather, I don't know which pad you refer to
<Joerg-Neo900> ooh on the N900 BoB?
<Joerg-Neo900> that's gold plated, while some of the pads are copper
<Joerg-Neo900> seems Nokia saved a 5ct per PCB not gold plating pads that are meant for soldering
<Joerg-Neo900> we won't do that, we get gold everywhere ;-D
<Joerg-Neo900> what puzzles me more is this completely random and seemingly pointless stuff http://wstaw.org/m/2018/04/10/plasma-desktopL22448.png