arm-netbook

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1076 discussions

Re: [Arm-netbook] rk3399 what full schematics does lkcl want?
by David Niklas 30 May '17

30 May '17

On Fri, 19 May 2017 18:17:16 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > --- > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > On Fri, May 19, 2017 at 4:49 PM, <ronwirring(a)safe-mail.net> wrote: <snip> > > Because a license prohibits it? > > no. > > > Because competitors can use them? > > correct. > > > Lkcl, have you asked tfirefly to give you the full schematics cad > > data? > > no... because they would think i was a bit dumb. or worse, wanted to > steal their business. i have no desire to piss them off. > > > > Because I got to think, you said tfirefly is withholding some > > schematics, > > no i did not say that. it may be true but i would not have > specifically said it. i may have said that *rockchip* has *not made > available the reference design* which is a totally different matter. > > you may have then thought "rockchip equals firefly". > > please try not to make cross-connections and/or correlations that > aren't actually the case. > > > > I wrote tfirefly asking them to email me the full schematics. > > Tfirefly never denied, that they had not made the full schematics > > public. They said, they could not disclose the full schematics. Maybe > > due to a lack of english skills on both sides. > > no, you've just misunderstood their business model. please don't ask > them again, it's not fair to ask them to make public something which > will destroy their business model. > > > > Then what should you ask tfirefly for? Full schematics cad data? > > absolutely nothing. you don't ask them for anything. they're a > third party business - an OEM. > > and we also can't ask rockchip either, because we're not going to > order a million of their processors, cash up-front... *until* they > have made full CAD data available. > > classic catch 22 situation. > > so instead we wait - as i specifically, specifically said - until > rockchip's Reference Designs leak out onto the public internet and are > available on e.g. taobao or other site, for sale for $25. > > l. So, how did the t-firefly group create their SOC if they could not get the CAD files? Thanks, David

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molex 12v 5v 2a power supply together with 3 way usb otg host charger cable
by ronwirring＠Safe-mail.net 30 May '17

30 May '17

https://www.amazon.com/Coolerguys-100-240v-Molex-Power-Adapter/dp/B000MGG6S… Can you power supply the pc card with the 5v 2a part of the power supply in combination with the 3 way usb otg host charger cable? Thank you.

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Re: [Arm-netbook] first prototype microdesktop casework
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 18:51:21 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > > On Mon, May 8, 2017 at 2:07 AM, <doark(a)mail.com> wrote: > > > I own a Reach3D printer. It's an all aluminum housing and z axis gear > > printer. I'm still in the construction phase, but if me and my caliper > > (it's auto-calibrating but I want it perfect :) work well together > > then I should be printing sometime around the 21st. I could help you > > with my printer at limited expense (unless something big happens in > > my life :) > > one piece of advice: buy some printbite, stick it to the aluminium > plate (after cleaning it - do follow PRECISELY the instructions for > printbite installation). better, get a MK3 (aluminium) bed plate, > because having a MK2 not in full contact with the aluminium is a pain > (uneven heat distribution and transfer). i've currently stacked some > cardboard underneath to make the MK2 stop bowing downwards... > *sigh*... > > printbite will stop a world of pain in both making prints stick and > also getting them off. but *read and follow the instructions*. > > l. Actually, I was thinking of using a lokibuild sheet (another kickstatr? thing (seems I have lost the link...)): here is one of the right size? https://shop3duniverse.com/collections/accessories/products/3d-universe-lok… Thanks, David

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Re: [Arm-netbook] Micro desktop corner design
by Luke Kenneth Casson Leighton 30 May '17

30 May '17

On Tue, May 30, 2017 at 5:09 AM, Tor, the Marqueteur <Marqueteur(a)fineartmarquetry.com> wrote: > On 29/05/17 16:56, Luke Kenneth Casson Leighton wrote: > ...snip... >>> 1. Am I right that the front right corner actually only needs a single >>> wide dado on the inside face for the eject button? >> >> yes. >> >>> 2. Do any of the components on the other three corners need cutouts, >> >> no. >> >>> or are they back just far enough to clear? >> >> yes. > > Then, presuming I can find a router bit within tolerance for the height > of the eject button, it looks like I could do this design as is for the > corners. if i thin down the parts on the inner edge i could potentially do away with the need for the eject button inset entirely. i also want to bring out the PCB cut through to the front so that you can do a straight-through cut with a router @ around 1.8 to 2.0mm. l.

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postMarketOS : good fit for EOMA50/68?
by Mike Leimon 30 May '17

30 May '17

Announcement of this project has been making the rounds lately and I think that it might be an excellent fit for an EOMA50 based phone/tablet (if and when those designs materialize). https://ollieparanoid.github.io/post/postmarketOS/ Currently they are targeting only old phone hardware however, I think that their concept would work well for any phone/touchscreen device that is designed to have a long useful life. I may be wrong but, I think a OS distribution of this nature would be an excellent complement to computing hardware that is also designed to last much longer than the current norm. -Mike

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Re: [Arm-netbook] libre 64-bit risc-v SoC
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 06:24:08 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > On Mon, May 8, 2017 at 4:00 AM, David Niklas <doark(a)mail.com> wrote: <snip> > >> > important to avoid, because mixed analog and digital is incredibly > >> > hard to get right. also note that things like HDMI, SATA, and even > >> > ethernet are quite deliberately NOT on the list. Ethernet RMII > >> > (which is digital) could be implemented in software using a minion > >> > core. the advantage of using the opencores VGA (actually LCD) > >> > controller is: i already have the full source for a *complete* > >> > linux driver. > > > > Considering that analog was around *long* before digital I'm surprised > > that it is "Hard to get right", > > analog isn't "hard". digital isn't "hard". specifically *MIXING* > them is ultra-hard. > > > is there a reason for this? > > completely different processes and design criteria. the restrictions > (design rules) placed on digital ASIC layouts have to be adhered to in > the *analog* areas: you can't just change the stack to suit the analog > areas. i don't know the full details, but i know someone with 30 > years experience of working with ASICs who does. > > > Isn't there a chip for just this kind of thing? > > no. not a custom one... and we're taking custom ASICs. Forgive me for contradicting you again, but don't all computers that have a MIC in jack using some sort of analog to digital converter? And vice-versa with Headphone out? I think they all use PCM. Would such a converter be suitable? Why? Thanks, David

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Re: [Arm-netbook] Micro desktop corner design
by Luke Kenneth Casson Leighton 30 May '17

30 May '17

--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 On Mon, May 29, 2017 at 7:38 PM, Tor, the Marqueteur <Marqueteur(a)fineartmarquetry.com> wrote: > Aloha Luke, > > I sent this to the list a couple times, but it hasn't shown up and nor > have any replies, so I'm sending it to you. I don't think anything's > changed with my email that should have done it, but maybe you'll see > something on the backend now that you know to look. > > Thanks, > Tor > > > Aloha, > > I just came across the page still up on my browser, and ended up with a > couple questions about the design as it stands now. > > 1. Am I right that the front right corner actually only needs a single > wide dado on the inside face for the eject button? yes. > 2. Do any of the components on the other three corners need cutouts, no. > or are they back just far enough to clear? yes.

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Re: [Arm-netbook] first prototype microdesktop casework
by David Niklas 30 May '17

30 May '17

On Mon, 8 May 2017 06:15:10 +0100 Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > On Mon, May 8, 2017 at 2:07 AM, <doark(a)mail.com> wrote: > > I apologize for DOS'ing the list, I can only get online about once a > > week. > > > > On Sat, 29 Apr 2017 12:42:29 +0100 > > Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> wrote: > >> > >> On Sat, Apr 29, 2017 at 6:08 AM, Luke Kenneth Casson Leighton > >> <lkcl(a)lkcl.net> wrote: > >> > http://rhombus-tech.net/community_ideas/micro_desktop/news/ > >> > >> ok, ouch, onto the fourth revision of the corner-pieces already, and > >> some minor changes to the plywood are needed as well. this really > >> would have been awkward if someone else did it. > >> > >> the anycubic 3d printer is holding up well. the higher-quality PLA > >> from the company i found on aliexpress seems reasonable so far (the > >> "standard" quality definitely isn't: it literally crumbles under > >> pressure). > > <snip> > > > > Luke, (I can call you Luke, since you sign your name that way, right?) > > PLA stands for Poly-Lactic-Acid and if they are selling you something > > else you can complain, if not sue for false advertising. That's why we > > label things, so that we know what they are, right? So one PLA aught > > to be the same as any other. Aluminum is aluminum, titanium is > > titanium, why is PLA not PLA? > > it's partly down to where the lactic acid comes from: like any > chemistry you get a different yield and a totally different > composition depending on the process, the purity and the ingredients. > > most companies use corn for the raw materials, and they don't process > (purify) it properly. the result is that the PLA gives off acrid > fumes, deforms under pressure, does not adhere properly (to itself... > which is kinda important) and is generally completely fucking useless > for well... everything to do with 3D printing. Is there a way to tell how good a company is with their PLA? Price would not seem to make a big difference since companies can just charge lots of moo-la even with a poor product. <snip> > ok, i'd like you to do a test. take a small piece about 5cm long and > bend it very very fast, as quickly as you can, making the loop as > small as you can (8mm or less if you can). > > good PLA will snap. > > shit-quality PLA will discolour, going light-coloured. > > another test - a really really important one - is to make a long > rectangle (35mm high x 5mm x 10mm would probably do) - the height is > important - then clamp one end to a desk. on the other end suspend a > weight tied with string as close to the end as possible. make the > weight... let's say.... 0.5kg or so. not very much. now leave it for > a month. <snip> Like this? +-+ <--- Rectangle | | +DESK++-+W <--- Weight | | | | | | Thanks, David

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Re: [Arm-netbook] why are notebook devices not usb?
by ronwirring＠Safe-mail.net 30 May '17

30 May '17

-------- Original Message -------- From: Luke Kenneth Casson Leighton <lkcl(a)lkcl.net> Apparently from: arm-netbook-bounces(a)lists.phcomp.co.uk To: Eco-Conscious Computing <arm-netbook(a)lists.phcomp.co.uk> Subject: Re: [Arm-netbook] why are notebook devices not usb? Date: Sat, 27 May 2017 18:56:18 +0100 > On Sat, May 27, 2017 at 6:16 PM, Christopher Havel > <laserhawk64(a)gmail.com> wrote: > > > Money. It's cheaper to do it that way.. > > yyep. this s pretty much.. errr... on the money An unforeseen answer. I thought it would be lower priced to make an usb device one time and several notebook manufacturers would buy the device for their notebook. The going for thinner argument sounds relevant. I thought making proprietary devices would make it more difficult and expensive for other manufacturers to make the same devices. Remarkable that it is lower priced for a manufacturer to make a device by themselves. > > > There's also the form factor to consider -- to an extent, there are no > > standards for laptop gadgetry because there's no way to do that. Different > > laptop sizes and shapes require differently-sized and -shaped crap inside. > > ... all completely optimised and customised based around what they > can get hold of, or what the reference design from intel is (which > will have specific power requirements and thermal requirements)...then > there is the constant demand for "thin-ness" which, as chris says, > means that a CUSTOM CONNECTOR gets ordered and made... and you can't > get hold of them. > > ron i wrote a long time ago when developing the tablet, about using a > single embedded controller which only costs $1, instead of putting in > a $1 USB hub, a $1.50 USB camera, a $1 USB audio IC and so on. > > it all adds up and the margins are so insanely low on laptops - ten > percent FOR THE ENTIRE CHAIN right from factory to sales - that they > just cannot justify the extra cost. > > l. > > _______________________________________________ > arm-netbook mailing list arm-netbook(a)lists.phcomp.co.uk > http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook > Send large attachments to arm-netbook(a)files.phcomp.co.uk

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ZEOMA Datasheet Hosting
by Alexander Ross 29 May '17

29 May '17

My friend that provided me with some hosting space to play with, is clearing up and with that my hosting space is coming to an end. I’ve made a copy of all the files for the zeoma project and will be uploading them to a gitlab group or https://www.archive.org

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