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<leviathanch>
focus: hi
<leviathanch>
I've sent you an updated A31 symbol, with S0 and S1 split into two separate subunits
<leviathanch>
this way you can connect the SDRAM much easier
<leviathanch>
I also added some text into the subunits
<leviathanch>
so that it's obvious which subpart is what
<leviathanch>
:-)
<focus_it>
thanks I got it
<leviathanch>
great!
<leviathanch>
something's a little bit fail: kicad would support drawings which are only visible within subunits, but you have to define it manually with a textedito. ther isn't an UI option for it >_>
<leviathanch>
so at the end I had to edit the a31.lib with vim in order to only draw the squares and the text within one specific subsymbol
<leviathanch>
^^
<leviathanch>
let's make this board as an opensource project, together
<leviathanch>
as long as I have my pads for soldering random stuff onto it
<leviathanch>
I'm happy
<leviathanch>
squee
<leviathanch>
:-D
<focus_it>
yup!
<focus_it>
do you get the kicad project with 3D for A31 and the expeyes + SODIMM joined together?
<focus_it>
the file also has the correction for pad size - needs to up it to 0.3mm
<leviathanch>
ah, did you receive my python script I wrote?
<leviathanch>
which updates the pad sizes automatically if you set the right parameter?
<leviathanch>
simplyfies everything a lot :-)
<focus_it>
hard to tell - the web mail i use out of hours is not same as evolution
<focus_it>
at work - so I can't see back too far
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<leviathanch>
uhm
<leviathanch>
focus_it: I've sent you a tar.gz file
<leviathanch>
which contains some python scripts
<leviathanch>
:-)
<leviathanch>
otherwise I'll send it to you again
<leviathanch>
but you need a csv
<leviathanch>
hmm
<leviathanch>
wait I'll just send you the tar.gz once again
<leviathanch>
;-)
<leviathanch>
focus_it: you've got email :-)
<focus_it>
ok thanks - the pads easily adjusted in pcbnew - right click pad > (select pad) > edit all pads > and then work with the option from there
<focus_it>
got it thanks
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<leviathanch>
focus_it: no problem :-)
<focus_it>
brilliant start preparing it as a proper project for release some time monday / tuesday
<focus_it>
I note the new cubieboard uses tiny cylinder for xtal - may be you want to do that, its a big space and cost saver
<focus_it>
the expeyes used smt - a bit expensive compared to watch type cylinder xtal
<focus_it>
what chip do you plan for the power? AXP209?
<focus_it>
leviathanch: if using AXP209, the expeyes project has it done and you can download it and copy/paste that into your schematic and save a lot of time
<focus_it>
The DDR parts also identical http://www.gplsquared.com/SoM2/NTC-DDR3-4Gb-B-R10.pdf NT5CB256M16BP-DI 256*16 to GT memory because it is JDEC compatible memory - so can copy schematic and bga footprint to save time
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<leviathanch>
focus_it: sorry, I was having dinner
<leviathanch>
no, the newer one, AXP221
<leviathanch>
focus_it: is the schematics symbol for the DDR contained within the tar.gz you've uploaded?
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<leviathanch>
focus_it: I was warned the PowerVR might give us some problems with the GPL
<leviathanch>
...
<leviathanch>
would be ironic if I'd get f**ed because my board commits a GPL violation after having shouted against companies commiting such myself
<focus_it>
leviathanch: "copyright holder do not need the permission granted by the GPL to distribute their own work, so they do not need to satisfy the GPL's requirements"
<focus_it>
it sez there - pro
<focus_it>
probably how they get around it
<leviathanch>
hehe
<leviathanch>
yes
<leviathanch>
what I ment
<leviathanch>
so we don't have a GPL violation at least
<focus_it>
Allwinner sez AXP221 - but datasheet in CN - google translate can help - but do you have a proper English translated datasheet of AXP221 to work with?
<leviathanch>
uhm, the most important information is the value table and the reference schematic
<leviathanch>
and I could even guess without google translate which of the rows and columns is the minimum and maximum voltage
<leviathanch>
;-)
<focus_it>
ok understand but one or two items hard to guess
<leviathanch>
our luck that nearly every CAD has been written by English speaking people
<leviathanch>
same for EDA
<leviathanch>
so they are forced to at least name the pins in European alphabet
<leviathanch>
xD
<leviathanch>
focus_it: yeah
<leviathanch>
focus_it: you don't understand Chinese?
<leviathanch>
or do you?
<focus_it>
i been in CN 2yr but not understand CN, also they have cad but obviously they can't export to here
<focus_it>
in cn they also have huge varieties of cheap dev systems but not export to here because its all in cn
<focus_it>
also numerous ultra cheap cpus costing $0.1 but as good as PICs and ARM cortex without the price
<leviathanch>
hmm
<leviathanch>
did you hear of this octa-core which should be released soon by some Chinese company?
<focus_it>
I ordered it half paid for by my company
<leviathanch>
most of it has been printed or is recycled iron
<buZz>
focus_it: resin prints are fragile
<leviathanch>
the threded rods and so
<leviathanch>
^^
<leviathanch>
focus_it: what does RMB mean btw?
<leviathanch>
which current?
<buZz>
right mouse button
<buZz>
:P
<leviathanch>
ahh
<leviathanch>
I've googled
<leviathanch>
xD
<leviathanch>
sorry
<focus_it>
RMB means CN currency
<leviathanch>
ok
<leviathanch>
hmm
<focus_it>
formlabs is 25 micron accuracy which is good enough for production run models in $ company which is why my boss agreed to buy it
<leviathanch>
that's cheap for so much RAM
<leviathanch>
wow
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<buZz>
focus_it: i am not talking about accuracy, that is great
<buZz>
focus_it: i am talking about being able to crush the prints with your hands
<leviathanch>
focus_it: I'll use both RAM slots, ok?
<focus_it>
leviathanch: ok
<leviathanch>
ok
<leviathanch>
focus_it: it's not the target which counted for me when building my prusa mendel out of recycling material
<leviathanch>
it was the way
<focus_it>
buZz: this for sales guys who need something to show to customers
<leviathanch>
cuting iron, debugging electronics, screwing and measuring
<leviathanch>
is as good as Zen meditation
<leviathanch>
^^
<buZz>
focus_it: ah yeah its fine for pointless demos, not for production work
<buZz>
reprap ownes production work
<focus_it>
i bought a reprarap but after 80% assembly I gave up - and then ordered parts to build my own one better designed - still haven't done it yet - shame on me
<focus_it>
i have a laser cutter and it makes parts in minutes such as boxes - but not proper 3d shapes with high definition
<leviathanch>
focus_it: you've got a laser cutter?
<focus_it>
80W
<leviathanch>
focus_it: can you also cut thin iron parts? around 2mm thick?
<focus_it>
600x400mm
<leviathanch>
oh
<leviathanch>
hmm
<leviathanch>
damn 80W won't cut iron
<leviathanch>
...
<focus_it>
metal cutting needs oxygen and 150W
<leviathanch>
yes
<focus_it>
or a 500W fiber laser
<leviathanch>
well, we have one at the hackerspace in Basel
<focus_it>
100k!
<focus_it>
cool
<leviathanch>
I'll ask folken if he can cut it for me
<leviathanch>
hmm
<leviathanch>
focus_it: where are you usually, when you're not in CN?
<focus_it>
in uk
<leviathanch>
oh, damn that's also far from Switzerland
<leviathanch>
still too far for a beer
<leviathanch>
^^
<focus_it>
i have travelled the world - may be some day i be there
<focus_it>
i was in geneva a few years back on an exhibition
<focus_it>
i can't remember its full name but it is one of the biggest
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<leviathanch>
focus_it: we have a hacked kinect sensor in our hackerspace xD
<leviathanch>
and also some low power plasma thruster based on Chen Diazs VASIMR200 design
<leviathanch>
^^
<leviathanch>
but really home brew and low power
<leviathanch>
with a recycled magnetron
<leviathanch>
3D printing, some basic physics experiments
<leviathanch>
what just cam to my mind
<focus_it>
wow - dangerous them magnetrons
<leviathanch>
you just need to shield it right
<leviathanch>
basically I couple all the energy into the plasma, so there's not much leakage
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<buZz>
focus_it: we are building a 3d scanner around a kinect setup
<focus_it>
i took apart a new microwave to get to the magnetron. My idea was to put it inside a transparent double wall box. The double wall will be filled with water and the microwaves can't then escape
<focus_it>
not enough time to go finish that project
<focus_it>
buZz: the matter form one is very supportive of open source - which is why I went for that
<penguin42>
focus_it: It's an interesting way to try and build a kettle
<buZz>
nice nice
<focus_it>
matter form sent me one of their high definition scans - it was very high definition - then I imported it into meshlabs and then into wings3d and it worked flawlessly importing end exporting
<buZz>
i think we are soon receiving someones line scanner
<buZz>
just a laserline + webcam + rotational platform
<penguin42>
meshlab is very neat - I've played with 3d fractals in that a few times
<focus_it>
penguin42: interesting way to experiment with microwaves without getting cancer. Need to see the experiment and what it is doing while experimenting to take the experiment forward - hence the double wall made of water
<buZz>
meshlab is really fast
<leviathanch>
focus_it: I've just tinkered around a lot with fundamental physics projects
<leviathanch>
you know, when something pops up in my head I have to finish it
<penguin42>
focus_it: I'm not sure I'd trust it to keep all the microwaves in
<leviathanch>
took me more then a year to finish the RepRap
<leviathanch>
but I invested every free minute into it
<leviathanch>
same for the thruster
<leviathanch>
it's my way to escape the daily problems
<leviathanch>
or hacking embedded devices
<leviathanch>
^^
<focus_it>
penguin42: which is why I never finished the project - need a microwave detector and more in case it penetrated the shielding
<leviathanch>
I borrowed one from my professor of physics
<leviathanch>
;-)
<leviathanch>
did cost me a beer
<penguin42>
focus_it: Well you could always build it inside the case of the microwave you extracted the magnetron from
<leviathanch>
yes
<focus_it>
levianthanch: that is great this persistance to get things done - I dabble but too much in too many pies
<leviathanch>
but I needed a long channel were the longer wave subharmonies can travel through and bear the plasma with'em
<leviathanch>
and the material of the original oven isn't enough
<focus_it>
penguin42: this experiment must not have metal objects other than experiment near it
<leviathanch>
so I had to use a fine looped iron web
<leviathanch>
hmm
<leviathanch>
sometime a small spark
<leviathanch>
otherwise all the microwaves stay within the plasma
<leviathanch>
nearly no emmision along the tube
<leviathanch>
10mN thrust
<leviathanch>
yeepee
<leviathanch>
1.2kW
<leviathanch>
>_>
<penguin42>
sorry - did you just say thrust?
<leviathanch>
oops
<leviathanch>
sorry, you got me, I'm not a native speaker ^_^"
<leviathanch>
uhh
<leviathanch>
it's right
<leviathanch>
ahh you mean because it's that weak
<leviathanch>
yeah
<leviathanch>
hihi
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<penguin42>
but you did say mN so that's consistent with thrust - I've never thought of a radio source as producing thrust
<leviathanch>
focus_it: they forgot to mention that it fries everything beneath it, uhum
<leviathanch>
^^
<leviathanch>
but yeah, radiation pressure is a well known phenomenon
<leviathanch>
take your 70W laser and point it towards a black colored pinpong ball
<leviathanch>
it will start to move
* penguin42
has no idea if that makes sense or not
<leviathanch>
since E=mc²=hv
<focus_it>
i don't believe in it - but the experimentation and its difficulty keeps nagging away to build something and test it
<leviathanch>
E=mc²=hv ;-)
<leviathanch>
since p=m*v
<leviathanch>
you can calculate the momentum of a photone
<focus_it>
the guy has a video (fake?) on youtube with his machine spinning on a turntable and nothing to make it turn that way
<leviathanch>
Dr.Harold White from NASA space centers Eagle Lab is working on a faster then light drive, seriously
<focus_it>
he claims about 50mN+ and the latest is 0.1N or better - can't scoff at such claims - got UK funding from government
<leviathanch>
and he's not a nut case
<leviathanch>
^^
<leviathanch>
hmm?
<leviathanch>
focus_it: 50mN isn't far from realistic
<leviathanch>
you only need a high radiation intensity
<leviathanch>
just fill it into the formula for the radiation pressure
<leviathanch>
calculate the area
<leviathanch>
woosh you've got such a value
<focus_it>
hmm... the wall of water would block the radiation
<focus_it>
so it would have to work inside the transparent box of water before i believe in it
<focus_it>
which is where I think this guy is going wrong
<focus_it>
i got the plastic to make the double wall and microwave is just a household microwave but still haven't got round to experimenting with it
<leviathanch>
I'd stick to a good old fashio shielding with fine looped iron
<leviathanch>
hmm
<leviathanch>
grate
<leviathanch>
it is called
<leviathanch>
^^
* leviathanch
sometimes has to loop up words
<focus_it>
the guy might turn that around and say the mesh interfered with his experiment by reflecting microwaves back - water - no chance!
<focus_it>
its crap anyway! :)
<focus_it>
I was going to make some plastic structures and stick down copper tape to get the metal structures I needed.
<focus_it>
If I understood my university lectures in electromagnetism, I would be able to really play with microwaves for the first time without risking injury. Build microwave devices, test them, etc.
<focus_it>
Even build plasma engines of low power - even a cross polaroid to block plasma penetration
<penguin42>
focus_it: Generally it's probably a bad idea to play with kW microwave sources unless you did understand it!
<focus_it>
I agree - which is why i stop
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<leviathanch>
focus_it: well if you are very unlucky a magnetron can actually already cause blindness
<leviathanch>
quickly
<leviathanch>
so take care
<leviathanch>
I had a special face protection on the first time I measured it
<leviathanch>
just to make sure
<leviathanch>
some students who were watching my laboratory and already knew a bit about mircowaves had the opinion I'd be too careful
<leviathanch>
but my sight is relevant for what I'm doing :-)
<focus_it>
true - the experimenter in me says I am trained to handle microwaves so I should do it all - but because microwaves are off the menu in science experiements, the practical experience is nil in classroom and in labs
<focus_it>
at our university you would have to head on down to the physics department to get to microwaves
<focus_it>
despite it being electronics department subject
<focus_it>
tooo dangerous - leave it for some time in the future
<focus_it>
good night folks :)
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