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Re: eoma68-jz4775 x-ray pictures

2016-04-29 14:21 Luke Kenneth Casson Leighton:
>
>> Your example of synaptic and stuff also needs running as root.
>[...]
> this type of faulty logical reasoning is rampant amongst
>non-technical people.  they *genuinely* believe that it is their fault
>when something goes wrong, so are completely afraid to do anything -
>to experiment, to tinker and to step outside of the box.

Well, that was kind of my point.

To enable non-free repos in Debian throught synaptic or whatever way
that you want, you need root, and many people will not do this [1],
neither in FSF-blessed distros nor in Debian.

But then, if one dares to use root and install files locally, or add
repo locations and so on, it can be done as easily in Debian as in
Trisquel/gNewSense -- just following a clear 3 step instruction in a
website, and that's it [2].

FSF considers that Debian enables people to use non-free software too
easily, even if it only happens when:

a) one installs the distribution in the device for the first time and
   *decides* to enable non-free repos -- which people with pre-installed
   devices will not do

b) or after that, when one *knowingly* (and as "root") enables Debian's
   clearly labeled "non-free" for some reason (or worse, 3rd party
   repos), containing non-free software -- which is also possible and as
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Re: Free distribution certification (was Re: eoma68-jz4775 x-ray pictures)

Hi,

2016-04-29 15:03 Paul Boddie:
>On Friday 29. April 2016 15.21.12 Luke Kenneth Casson Leighton wrote:
>>
>> > Since the alternatives that FSF recommend and bless are something like
>> > Trisquel or gNewSense, which are based on Debian (or Ubuntu?),
>>
>>  trisquel's based on ubuntu 8.04, and hasn't moved since.  gNewSense
>> is debian, and they appear to have used debian, but went for a much
>> more comprehensive "rebranding".  i'm interested in doing the minimum
>> required amount of work here.
>
>I think it's easy to go round in circles here when the FSF's own guidelines
>can instruct us and help explain why these separately-branded distributions
>exist. I hope the FSF doesn't mind me quoting from their document. ;-)

I know the reasons, but I don't agree with them and think that they are
misguided and actively harmful in this area.

Which is a shame, because in general I align 100% with the principles of
the FSF, as many other people in Debian do.

( Yes, I know that this is futile to resolve here, just wanted to refute
  some of Luke's points about being difficult to install non-free
  software in FSF-certified distros.

  BTW, I forgot to say that apt-1.1 and gdebi both install and resolve
  dependencies of local files, so they're even more convenient to use
  than dpkg for this purpose.  Probably package-kit-based front-ends and
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eoma68-jz4775 x-ray pictures

http://rhombus-tech.net/ingenic/jz4775/news/

this is totally cool, photos of the x-ray machine and the DDR3 and
jz4775 SoC.  of the six samples made, only one did not have bridging
between the DDR3 ICs, so i asked the factory if they'd like to get
some experience at sorting out BGA ICs, which they did - here's the
results, and they look great.

l.

---
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sandwich200 folding portable 3d printer

just a quick update,  the past week has been ridiculously busy, the
folding portable printer is going well, frame's constructed, parts are
arriving, i'm maintaining a set of pictures here:
http://lkcl.net/3dprinters/portable.sandwich200/rev1/

the primary thing right now is to get a printer that's functional so
that i can continue to print the laptop parts and potential redesigns
of both the printer and the laptop no matter where i am.  i've made a
couple of design errors in the printer which make it awkward to
assemble and disassemble, but it is still actually possible to pack up
so i am not going to correct those immediately, i have a very limited
amount of time before i leave holland.

thank you so much to the people who've sponsored the printer, i
couldn't be doing this without your support.

l.

---
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Cyril via arm-netbook | 15 Mar 09:54 2016
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Fw: new important message

Hello!

 

New message, please read http://boynuincelibal.com/minute.php

 

stage.nexvision <at> laposte.net

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foldable portable corexy 3d printer

hi folks,

https://youtu.be/Q0OKtxZ3CKw
https://www.youtube.com/watch?v=3n4vfIlU1B8

i'm almost ready with the casework and preparations to go to
crowd-funding.... and i have to leave holland and get ready to move
each month *every* month to a different country until the end of this
year, to track the laptop and the microdesktop through crowdfunding.

now, i am *going* to need a portable 3d printer.  i've looked....
these are not suitable:
http://reprap.org/wiki/Category:Foldable_RepRap

they're either too big or the print size is too small.

by using a corexy design [1] i can get speed, accuracy and rigidity
into a compact size.  i've found the Fusebox [2] and like it a lot.

question: would anyone be willing to sponsor the creation of the first
prototype? (yes i will be putting it into crowdfunding in its own
right).  components cost will be somewhere around the $USD 600 mark
which really isn't a lot.

the key advantages for engineers of this design is that they'd
actually be able to get on an aeroplane with this as hand-luggage.
with a build volume of 200x200x200, it would fold down into its own
box at around 320 x 280 x 150mm.

so going to customers and bringing a 3d printer to work on-site,
carried on a motorcycle, scooter, bicycle or on foot, is a distinct
advantage.

interested let me know.  i have about 2 months to get this printer
completed and functional.

l.

[1] http://www.doublejumpelectric.com/projects/core_xy/2014-07-15-core_xy/
[2] http://reprap.org/wiki/Fusebox

---
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when 3d spine curves go slightly wrong...

https://youtu.be/BYNgp9s1Ni0

---
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EOMA68 15.6in Libre Laptop casework completed

http://rhombus-tech.net/community_ideas/laptop_15in/news/EOMA68_Libre_15.6in_Laptop_casework_completed/

a few niggles to resolve but basically i'm happy with this.  panels
are in.  i'm amazed that cutting a 1mm chamfer into 1.5mm 3-ply bamboo
plywood works as well as it does.  it's one of those things where you
think, "hmm that might work", then the design phase stretches out to
an entire year and it's still not been confirmed - finally the panels
arrive, it's "eek!" for a couple of months because the preliminary
channels don't fit the panels properly, then "eek!" again because it
takes two iterations (of a week each) to reprint almost 100% of the
[35] parts, "eek!" some more when you've only ordered 8 panels and
there's only one spare left, and finally "whewwwww" when it all fits
together.

l.

---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

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Jakub Kákona | 2 Mar 13:15 2016
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Re: EOMA68 laptop battery management.

Hello,

I take look on the bq24193's datasheet  and I think it is almost perfect IC for intended application.
STC3115 seems to by quite cheap but not the best solution.

We currently have quite outdated, but still better battery gas gauging design based on BQ34Z100.

Documentation is here
 http://www.mlab.cz/Modules/PowerSupply/LION1CELL01A/DOC/LION1CELL01A.pdf

I think the main work should be the redesign of our LION1CELL01A module with bq24193 charger integrated in it. We should do it in KiCAD probably in form of new MLAB module (for testing). The exact PCB for Libre laptop should be derived from it then.

Is current blocks/circuit schematic of Libre laptop somewhere? I do not understand how the higher voltages (+5V) or +12 (for LCD) are efficiently generated from battery? Has this design higher efficiency than two balanced cells connected in series?

2016-02-28 23:54 GMT+01:00 Luke Kenneth Casson Leighton <lkcl <at> lkcl.net>:
---

 ok, well actually there is a sub-task that i could do with your help
on: i need a 15 watt *single-cell* battery charger / monitor board
which is compliant with the USB-OTG Power specification up to 3A <at>
5.0V and can be controlled via I2C as to which direction the power
goes... *and* can take DC input at the same time.  i've found the
bq24193, it's the best i could yet find that will do the job.  the
only thing is, its I2C interface is hard-wired to 1.8v and i need 3.0
to 3.3v, so there will be some level-shifting needed there.  it also
will need a battery monitor (coulomb counter) - the STC3115 QFN is
what i had in mind, but if you have something better please do say so.

PCB size needs to be no bigger than 32 x 85mm, 1.5mm thickness, 2
layer *ONLY*, components *ONLY* on one side, no through-hole
components or connectors are allowed, and there is a severe [hard]
height limit of 5.5mm so the only DC connector i could find which can
handle 5A and is within that limit is the PJ-018H-SMT from CUI Inc.

 also, i really loved the solar panel idea and it turns out that the
PJ-018H-SMT has a 3-pin arrangement, so in theory a diode and a solar
panel in series between pins 2 and 3 would provide solar power when
the DC-jack is disconnected.  pin 3 (to which the solar panel would be
wired) would be disconnected when the DC jack is in.  pin 2 is GND.



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Jakub Kákona | 28 Feb 20:25 2016
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EOMA68 integration in to MLAB modular system.

Hello all, 

I am coming to this forum trough that page: https://www.youmagine.com/designs/libre-hardware-licensed-parametric-laptop-design#activity--comment-create--6082 Thanks very much for this great work!

I am interested in EOMA68 project for several years. Althought I am currently using the ODROID boards in my projects -  one  example is radio meteor detection station: http://wiki.mlab.cz/lib/exe/fetch.php?media=cs:designs:rmds:rmds02d_station.jpg

This is a typical candidate of electronic computing device which needs occasional  hardware upgrade or rapid firmware and configuration change..  Therefore I looking forward for moment when we could integrate the EOMA68 cpu card in our modular system http://www.mlab.cz/ and after that in to related designs which already exists. 

Therefore you can count on me if there were a group order of EOMA68 cards or an crowdfunding campaign.

We have a long term electronics design experience and quite good contacts to other electronics manufacturers here in the Czech Republic. I would like to ask if there were some subtask which we could help with?  If none,  I will continue to work on related problems such as open-source battery management and effective solar charging system for portable devices.

But the cooperative development will be the best solution because there are huge tasks which we need to overcome. Uniform 3D printable laptop is one of the things which could bring together the open-hardware design community. I expected it even in case of Novena laptop, but they go to the different direction focused on performance needed for hacking.

Kaklik
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eoma68 laptop casework progress

hi folks sorry been extremely busy.

i've managed to work out some superb settings for the mendel90, it's
currently operating at *200*mm/sec, with a layer height of 0.15mm, and
the prints are coming out with smooth walls most of the time.  i'm
deeply impressed with the mendel90, now - it's only taken me 18 months
(!!) to get the right settings.

the bamboo plywood is in place, successfully - i put a diagonal cut on
each edge, and a matching groove into each piece of 3d-printed
plastic, only about 0.8mm depth (it's supposed to be 1.4mm but it
prints out at less than that) - and the panels hold perfectly.

not only that but they hold sufficiently well that i decided to use
them for structural support on the screen edge.  the screen hinge has
proved particularly tricky: it's quite a small piece, taking a huge
load because it contains the friction hinge.  turns out that if i jam
the bamboo panel into it (and its neighbouring pieces), the screen
hinge stays still under load.  i'd previously tried all sorts of
tricks to get the screen hinge to "lock" into its neighbouring pieces
and it wasn't working: the plywood does a really good job.

am still making minor adjustments, chewing through PLA like it's no
tomorrow, photos to follow, then they can be sent to crowdsupply.

l.

---
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Gmane