arm-netbook July 2015

arm-netbook@lists.phcomp.co.uk

10 participants
9 discussions

Re: [Arm-netbook] 15.6in laptop progress
by Hans-Christian Jehg 27 Jul '15

27 Jul '15

>On Thu, Jul 23, 2015 at 9:03 PM, Philip Hands <phil(a)hands.com> wrote: > >>> then i began work on the friction hinge for the screen lid, so that >it >>> will remain upright. you'd think it would be easy to create an >> >> Nope ;-) > > you'd be right! > >> You could just not bother with a lock. > > yehhh the friction hinge isn't accurate enough, there's a few degrees >of play and that means the lid will be flapping by about... at least 1 >maybe even 2cm once wear sets in. > >> I have a Lenovo Thinkpad X230, and it has no lock on the lid. >> >> There is a slight impression that the lid snaps shut when almost >closed, >> but it's not clear if that's really the case. >> >> You could alternatively do some sort of rotating thing on the >corners, >> like the OLPC's wifi arials. > Magnet(s) to hold the lid closed? > ah! of course! nice idea... i don't hold out much hope (the screen >edge plastic is only 2.5mm thick as it is) - i'll try to drop it into >my tiny subconscious and see what happens over the next couple of >days. > >l.

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15.6in laptop progress
by Luke Kenneth Casson Leighton 23 Jul '15

23 Jul '15

is there no end to the detail that's needed?? okaay so i started on the screen edge, which (surprise) turned out to need to be thicker than anticipated. increasing the thickness by 2mm had a knock-on effect because, naturally, the base end depth has to be increased to match. then i began work on the friction hinge for the screen lid, so that it will remain upright. you'd think it would be easy to create an interlock between two pieces 8mm in diameter that looks aesthetic and is strong enough, but nooo i can tell you it damn well isn't :) now i am onto one of the final pieces of the puzzle: creating a lid lock. this needs to be spring-loaded (ball-point biro pen spring, cut into 1/4s 7mm long) and i am kinda amazed at how much detail is needed in such a small space. the clasp is 10mm x 9mm x 8mm but requires a 5mm diameter hole in the centre (for the spring)... we'll have to see how it works out. l.

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video of 15.6in laptop casework
by Luke Kenneth Casson Leighton 17 Jul '15

17 Jul '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ just created a 5min video describing the casework: the parts for the base are now completed, i will move onto the screen next. l.

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15.6in libre laptop "whoops"...
by Luke Kenneth Casson Leighton 14 Jul '15

14 Jul '15

oh dear, first mistake: hoping it's not too big a deal... i've done the base, now, and have moved on to doing the LCD screen holder parts. i forgot to check which side the connector is... turns out that when the screen's facing forwards the connector is on the *right*.... guess which side i put the main PCB? yep, on the left... so that shouldn't be so big a deal, right? just run the cable all the way along the back of the lcd until it pops out? noo problem, right? ... except it has to cross the middle part of the LCD, which is where there is a divider so that the left and right bamboo laminate panels can "lock" into place, and also so that the top and bottom channels can be divided into two (so they'll fit across a 200mm x 200mm 3d printer). the problem is in joining the parts together. previously i had thought to slot a little u-shape in place which would act as a trap: the ends of each of the U would "lock" into the left and right edges.... noo problem, right? except now there's a cable that has to go through exactly where that joining-piece was supposed to go. the other option: i was considering mirror-imaging the laptop base. put the PCB on the right, battery on the left.... except argh i remembered that i had to *offset* the touchpanel from centre (by about 30mm) in order to fit the battery to its right, and also fit PCB2 so that the keyboard connector goes into it.... all of this means that there is absolutely no way that the parts can be mirror-imaged: it's a near total redesign of the interior, and i'm certainly not doing that. sooo i have an eeenteresting mechanical design challenge left to think about.... :) l.

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Req: FOSS-restricting firmware hints
by Nico Rikken 08 Jul '15

08 Jul '15

Dear ARM-netbook and Coreboot readers, In FSFE context we're looking for examples regarding firmware restrictions on modern computer hardware. This so that we can shed light on the difficult situation you are all too familiar with. Examples are: - Trusted Platform Module (TPM) chips - Secure Boot - Intel - Management Engine - Advanced Management Technology - Boot Guard It will be great if you can add some from the top of your head, ideally including some references. I'll be doing my own research as well, but your hints will greatly help this process. Kind regards, Nico Rikken

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05 july 2015 laptop casework progress
by Luke Kenneth Casson Leighton 05 Jul '15

05 Jul '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ getting there. next is to do the right-hand edge, which will take the 3rd PCB (battery, power etc.). all sorts of small niggles, still have to check that the bamboo panels will fit, for example! need to get some battery samples to make sure that it'll fit, etc. etc.... l.

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spaghetti instead of 3d
by Luke Kenneth Casson Leighton 03 Jul '15

03 Jul '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ first print of 4 of the full-sized parts - enough to put the keyboard and touch/LCD in place to see what the laptop will look like. l.

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Fundraising and campaign status (and wiki authentication)?
by Paul Boddie 01 Jul '15

01 Jul '15

I saw a collection of recent updates on the wiki, although the URL in the following page is wrong: http://rhombus-tech.net/fundraising/ Where... https://crowdsupply.com/eoma68/micro_desktop ...should be... https://crowdsupply.com/eoma68/micro-desktop I tried to authenticate myself using various mechanisms in order to edit the page, but... * OpenID didn't work with the Python Package Index OpenID provider * Google have discontinued their OpenID 2.0 support (yes, thanks Google for breaking the Web again!) * Wordpress claimed that I don't own my own username Particularly the last one, but also the first one, sounds more like communications issues between the wiki and OpenID providers. I guess I could register, but I thought it might be helpful to indicate a possible problem. Paul

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15in laptop casework progress
by Luke Kenneth Casson Leighton 01 Jul '15

01 Jul '15

http://rhombus-tech.net/community_ideas/laptop_15in/news/ getting there. redesigned the central spar to be more structural support, to help prevent torsion and to give the back edge part something to get its teeth into. a beefy touchpanel holder worked out well for keeping the front edges in place, so this was replicated at the back as well. l.

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arm-netbook July 2015