Paul Boddie | 1 Mar 19:24 2015
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Any news?

Hello again,

I keep checking the recent changes page on the Rhombus Tech site [1] for 
progress, but it seems a bit dormant at the moment. Has Chinese New Year (and 
other seasonal pitfalls) served to keep the pace of development a bit more 
modest than us impatient onlookers might have liked? ;-)

Paul

[1] http://rhombus-tech.net/recentchanges/

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LCD cables - anyone know where to get them?

does anyone know - preferably have already bought from and so knows
they can do it - of a source of LCD cables?  i need QTY 3 cables with
an I-PEX-20453-040T connector at both ends, length 0.5 metres.  wires
not FPC.

i found a company in germany however they quotes only deal with
companies quotes.

l.

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CM108AH

ironically, i have had a CM108 chipset sitting right here, in
continuous use, for about 7 years now.  i bought a usb dongle in
canada back in 2007.  i had my suspicions, and i've been able to open
it up and confirm that yes it's the CM108.  i've made a couple of
minor changes to the tablet's audio circuit as a result.  all good!

l.

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The Unplanned Obsolescence of the First Fairphone Device « Paul Boddie's Free Software-related blog

https://blogs.fsfe.org/pboddie/?p=802

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tablet, microdesktop and laptop progress

well... some good news, we have sponsors for both the 7in tablet and
also a 15in laptop, which is amazing!

the laptop we have chosen a 15.6in 1366x768 LCD because anything lower
than that (either in size or in pixel resolution) is no longer
properly fashionable, it appears, whereas i am surprised to find that
15.6in 1366x768 LCDs are not only extremely popular (over 50,000 for
sale on panelook.com), but also their power requirements are far more
modest than one might expect: around 3.5 watts for the backlight which
is pretty incredible.

with the popularity of netbooks and tablets taking over, it kinda
makes sense that even 13.3in LCDs are just not hugely popular.  so...
15.6in it is.  i do want to do a 1920x1080 15.6in... but not right
away.  i don't want to push things too much (EMI wise) and also even
finding the faster RGB/TTL to eDP or dual-LVDS ICs is... tricky.  so
we tackle that later.

the only downside of using 1366x768 is that it is above the limit of
1280x800 set for EOMA68 in a 5.0in form-factor.  i am not going to get
massively unhappy about this, but the CPU Card has to remain *inside*
the unit as a non-user-removable part.  the hilarious thing is that
the ICubeCorp IC3128 will actually work!  i tested it yesterday and it
can run 1280x1024 at 60hz (if you set 8bpp - 3Red, 3Green, 2Blue).  i
find this to be very very funny.  a $USD 2 Quad-Flat Package processor
running in a 15.6in laptop.

with sufficient funding however we may be able to go straight to a
1920x1080 EOMA68-compliant laptop, by redesigning the EOMA68-A20 to
fit within the 3.3mm PCMCIA form-factor.  that will require some
(Continue reading)

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revision 2 EOMA68-IC3128 board works

i'm delighted to be able to announce that the revision 2 of the
EOMA68-IC3128 ICubeCorp board is 100% working.  the board arrived from
HK at the end of last year, but the hub appeared to be not working and
neither was the MCS7832 USB-Ethernet IC.

it turns out that the hub is working fine: the preliminary kernel
support for the IC3128 at present only supports high-speed devices, so
for example a mouse or keyboard (which are only USB 1.1 devices) are
not recognised but a Genesys Logic USB SD/MMC device, a USB SATA
drive, or any other 480mbit/sec device, are all supported.

the on-board MCS7832 however was configured (by 3 resistors which
should not have been added) to be a low-speed device.  removing these
three resistors the MCS7832 worked perfectly.

given that the kernel support for USB 1.1 speeds is a software issue
this board can be added to the crowdfunding campaign as an
FSF-Endorseable option.

woo!

l.

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tablet casework prototype done

http://rhombus-tech.net/community_ideas/kde_tablet/news/

the mendel90 printer is working really well, and was absolutely worth
it to use for prototyping of casework.  the 7in tablet project is now
being done as an open hardware project, under the GPLv3+.  files are
available at http://hands.com/~lkcl/eoma/kde_tablet

with a preliminary casework finished that has been prepared in
conjunction with the pcb layout, work can proceed to finalise the pcb
and then send it off for assembly.  there are a couple of risky areas
on the tablet pcb, due to datasheets and app notes simply not being
available: the usb audio and the usb camera IC. these are a CM108AH
and a Vi Micro VC0345 respectively. perhaps prior to sending off this
PCB it may be worthwhile tracking down small USB devices with those
chipsets in, in order to inspect them and check their PCB layout.

however if anyone already _has_ a USB audio dongle with a CM108AH or a
USB camera with a VC0345 chipset please do say so as i would greatly
appreciate some hi-res photos of the PCB, both sides.

l.

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3d printed tablet casework

http://rhombus-tech.net/community_ideas/kde_tablet/news/

turned out okay for a first print.  lots of thought required, as 3d
printing of parts to use as laminates is not entirely satisfactory.

l.

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EOMA68-IC3128 revision 2 back from assembly and is working

http://rhombus-tech.net/icubecorp/IC1T/news/

no hardware faults found, which is fantastic.  they have not been sent
back to me yet so i have to run some tests here first but this looks
like these cpu cards (which are FSF Endorseable) may be added to the
crowdfunding campaign.

hooray.

l.

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sahil mehta | 16 Dec 15:35 2014
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Unsubscribe from the mailing list

Hi,
Kindly un-subscribe this mail id from the mailing list.

Thanks 
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tablet rev 3.2 layout

http://rhombus-tech.net/community_ideas/kde_tablet/news/

well it's a fixed PCB size, doesn't have to be a split design, but
there's no possibility of sharing this across 2 or more designs.
because of that i've cut out the extra components.  still working on
getting the layout right: the current issue is that the LCD is taller
so obscures the middle-centred camera.  that means the camera needs to
move to the corner.

it's an almost never-ending series of details, aaaaaaa!

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Gmane