highaltitude.log.20121018

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[01:05] <MLow> fsphil: do you remember the value of the decoupling capacitor I put on the HX1 TXD line to get it to decode properly
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[05:18] <Elwell> SpeedEvil: you're from .au right?
[05:20] <Elwell> can you point me to decent jobsearch websites (linux sysadmin) for the Adelaide area? most of the 'australian' ones just seem to cover sydney and melbourne (suprise suprise)
[05:20] <SamSilver> Elwell: nope you wrong Speedy is from UK Darkside is from .au
[05:28] <Darkside> i'm deom adelaide too
[05:28] <Darkside> from*
[05:28] <Darkside> but not sure
[05:28] <Darkside> Elwell: not really sure where to look, maybe seek.com.au?
[05:29] <Darkside> i ugess here too http://whirlpool.net.au/jobs/?state=SA
[05:29] <Darkside> not that theres much on it
[05:32] <arko> just got off a video conference with OZ people
[05:32] <arko> the sun is up over there
[05:32] <arko> O_o so bizzar
[05:32] <arko> still freaks me out
[05:32] <arko> i have no idea why
[05:32] <Upu> crazy orbiting round the sun planet
[05:32] <arko> i know right!
[05:33] <arko> crazy kids
[05:33] <Upu> at least it confirms that earth isn't actually flat
[05:33] <arko> hahaha
[05:33] <arko> PROOF
[05:33] <arko> or he has an lcd in the back
[05:33] <arko> totally a conspiracy
[05:33] <Upu> that would be huge :)
[05:33] <arko> joke was only on me though
[05:33] <arko> the whole world was in on it
[05:39] <SamSilver> http://imgur.com/wf6vz conspircy
[05:39] <arko> :O
[05:41] <daveake> If the Earth was flat, at least one of our flights would have fallen off the edge by now
[05:42] <Upu> oh good morning daveake
[05:42] <Upu> morning ? Evening ?
[05:42] <daveake> evening
[05:42] <Upu> when are you back ?
[05:42] <daveake> Get it right :)
[05:42] <daveake> Monday
[05:42] <Upu> ok
[05:42] <daveake> Just in time to get ready for the first of the flight-a-thon
[05:43] <Upu> yeah I need to run test this board with 2 GPS's on this weekend
[05:43] <daveake> 6:40 over there?
[05:43] <Upu> cheers for link
[05:43] <Upu> yes
[05:43] <daveake> That's too early
[05:43] <Upu> first day back at work
[05:43] <daveake> nice
[05:43] <Upu> got to go in early and sort all the orders out
[05:44] <daveake> I love it when I get orders when I'm on my hols
[05:44] <daveake> Makes me feel like I'm earning money whilst having fun
[05:44] <Upu> well that :)
[05:44] <daveake> 2 to pack and send when I get back
[05:45] <daveake> A pic to make you jealous :p https://sphotos-b.xx.fbcdn.net/hphotos-prn1/552532_10151103338927654_1615761773_n.jpg
[05:45] <Upu> thats nice
[05:45] <Upu> lol
[05:45] <Upu> view from the bedroom ?
[05:46] <daveake> Not quite, but yes we did have a nice view of Half Dome from our RV
[05:47] <daveake> Last night: Sun setting on half dome; reflection in the water below; burgers on the BBQ.
[05:47] <Upu> sounds amazing
[05:47] <daveake> Was
[05:48] <arko> i need to move to europe
[05:49] <daveake> i need to move to California
[05:49] <daveake> So much flat land to land on :D
[05:51] <arko> hahahaha
[05:51] <arko> no way
[05:51] <arko> thats middle america
[05:51] <arko> california is a bunch of mountains
[05:51] <arko> trust me
[05:52] <arko> Source: I've lived and launched from california my whole life
[05:52] <arko> we do have cool stuff through
[05:52] <arko> LIKE A SPACE SHUTTLE
[05:53] <daveake> Been there done that
[05:53] <daveake> We drove through quite a lot of flat land today. And unless the GPS is lying we're still in CA
[05:54] <daveake> Saw a shuttle launch in 2009. Epic. And they didn't have to cut down any trees :)
[05:55] <daveake> Yesterday evening: http://i.imgur.com/LqwyF.jpg
[05:56] <arko> haha
[05:56] <arko> oh man
[05:56] <arko> yosemite
[05:56] <arko> well the middle of cali is flat
[05:56] <arko> but you will piss off farmers
[05:57] <arko> burgers!
[05:57] <daveake> Yeah we noticed this is farming land.
[05:57] <daveake> Fruit
[05:57] Last message repeated 1 time(s).
[05:57] <daveake> More fruit
[05:57] <arko> haha
[05:57] <arko> yep
[06:03] <Elwell> ah ta Darkside -- *possibly* thinking about moving down under (wife is a kiwi) when my contract finishes
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[06:05] <Elwell> daveake: pfft. I'll see your half dome and raise you mt blanc :-)
[06:05] <Elwell> (looked stunning this AM, nice red sky and sillhouetted on way into work
[06:05] <daveake> nice
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[06:21] <jcoxon> ping Upu
[06:27] <UpuWork> morning James
[06:28] <arko> the sun rises in the euro
[06:28] <arko> and im drinking scotch while surfing digikey
[06:28] <UpuWork> which one ?
[06:28] <UpuWork> ping jcoxon
[06:28] <arko> macallan 21
[06:28] <UpuWork> not tried that one
[06:28] <arko> its wonderful
[06:28] <UpuWork> I like my Islay Whiskies
[06:29] <arko> ohh
[06:29] <arko> Ardbeg is good
[06:29] <arko> Bowmore
[06:29] <arko> all good choices
[06:30] <UpuWork> yup have both those in "stock"
[06:30] <UpuWork> Lagavulin
[06:30] <arko> oh man
[06:31] <arko> good one
[06:31] <jcoxon> UpuWork, hey - got the board
[06:31] <UpuWork> excellent
[06:31] <jcoxon> right work
[06:31] <UpuWork> got through the letter box then
[06:31] <jcoxon> will email later
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[06:31] <UpuWork> ok
[06:32] <UpuWork> btw if you ever find any Port Ellen have a glass
[06:33] <UpuWork> Rare as these days but very very very good
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[06:52] <Darkside> Elwell: adelaide is a nice city
[06:52] <Darkside> quiet
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[07:08] <nosebleedkt> hello everyone
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[07:10] <nosebleedkt> just put some color enhancment and got this cool image
[07:10] <nosebleedkt> https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-ash3/622146_531013746912674_148371514_o.jpg
[07:10] <nosebleedkt> :D
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[07:39] <UpuWork> ping x-f
[07:39] <x-f> pong
[07:39] <UpuWork> morning
[07:39] <x-f> morning
[07:40] <UpuWork> PM
[07:40] <x-f> ok
[07:42] <UpuWork> can you see my PM ?
[07:42] <costyn> morning
[07:42] <UpuWork> morning costyn
[07:43] <UpuWork> UpuWork x-f not Upu :)
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[08:33] <fsphil> dull grey outside. log in and find daveake's posted pics. now jealous :)
[08:33] <cuddykid> link?
[08:33] <fsphil> https://sphotos-b.xx.fbcdn.net/hphotos-prn1/552532_10151103338927654_1615761773_n.jpg
[08:33] <cuddykid> not too bad here - at least it's not raining!
[08:33] <cuddykid> oh nice!
[08:33] <cuddykid> wow
[08:33] <fsphil> maybe next year
[08:34] <fsphil> assuming I dont' get eaten alive in .au
[08:34] <fsphil> I hear that can happen there
[08:37] <cuddykid> haha
[08:37] <cuddykid> when are you going to oz?
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[08:38] <fsphil> november, gonna hopefully see an eclipse
[08:39] <costyn> fsphil: holy crap http://imgur.com/gallery/T1dUz
[08:43] <fsphil> hah
[08:43] <fsphil> rain station
[08:45] <fsphil> https://lh3.ggpht.com/-Kduu2cYknzs/TiwndJWeSNI/AAAAAAAABcA/nJcGMUyq__I/s400/IMG1.jpg
[08:45] <fsphil> reminds me of Spirited Away
[08:46] <kokey> haha, yeah it does
[08:46] <costyn> fsphil: so did you almost drown too, or was the rain station far away?
[08:47] <fsphil> it's pretty much on the opposite end of the island
[08:47] <fsphil> we had some heavy rain but nothing like that
[08:51] <fsphil> it never trains but it pours
[08:53] <costyn> ah ok :)
[08:54] <costyn> google datacenter wallpapers: http://imgur.com/a/xQPKq amazing
[09:00] <x-f> ooh, shiny
[09:00] <fsphil> like the bike
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[09:00] <x-f> few pics remind me of the scene from "The Matrix" - "we need guns, lots of guns"
[09:06] <costyn> hehehe
[09:06] <costyn> neatest datacenter I've ever seen, but that's what you get I guess if you have pretty much unlimited funds and only 1 customer :)
[09:06] Action: mfa298 wonders how much of that datacenter is for show rather than real use.
[09:06] <russss> I do suspect some of the lighting may have been added for show
[09:06] <mfa298> I wouldn't be surprised if a few racks are kept super neat and the rest are more like standard DC racks.
[09:06] <Lucasbuck> morning
[09:06] <eroomde> morning
[09:06] <fsphil> mooning
[09:06] <Lucasbuck> Q for you all
[09:06] <Lucasbuck> payload radio construction
[09:07] <Lucasbuck> any good beginners guides/references on how to make the external payload antenna + ground floor?
[09:07] <Lucasbuck> its ground something right? :)
[09:08] <eroomde> ground plane :)
[09:08] <eroomde> close enough
[09:08] <Lucasbuck> thats it :)
[09:09] <Lucasbuck> just wondering if anyone has documented the assembly of that
[09:09] <Lucasbuck> tips / tricks / pitfalls
[09:10] <eroomde> have a look at this:
[09:10] <eroomde> http://blog.jgc.org/2011/01/gaga-1-getting-close-to-completion.html
[09:10] <eroomde> though in general we encourage soft, eye-friendly antennas
[09:10] <eroomde> so say unstiff wire help straight be stringing straws or whatever
[09:10] <eroomde> as opposed to a coat hanger
[09:11] <Lucasbuck> ok
[09:11] <Lucasbuck> and what actually connects the radio output, the vertical wire only
[09:11] <Lucasbuck> or the ground plane wires also?
[09:11] <UpuWork> Lucasbuck http://ava.upuaut.net/files/2010-09-03%2019-26-16_0003.jpg
[09:11] <Lucasbuck> looking
[09:11] <eroomde> but essentially, you run so coaxial cable from the radio output (probably an SMA connector), and the centre core of the coaxial cable is the RF line, which you solder to the vertical active element
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[09:11] <Lucasbuck> ah i see
[09:12] <eroomde> and the outer metalic sheath is the ground sheach, which you solder to the ground plane
[09:12] <Lucasbuck> got it!
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[09:12] <Lucasbuck> so i could jig sometihng up that goes round the sma connector for the ground plane
[09:12] <Lucasbuck> some ring / disk shaped bit of metal
[09:12] <eroomde> yes indeed
[09:12] <Lucasbuck> that has some nice connections for 4 ground plane wires
[09:12] <Lucasbuck> niec
[09:12] <eroomde> in that example, the outer casing of the connector is gnd too, so you can attach the radials directly to that
[09:13] <Lucasbuck> cool
[09:13] <eroomde> which would be nice and robust, mechanically
[09:13] <Lucasbuck> scarry part is, holding it all together
[09:13] <Lucasbuck> so bits dont fall off :)
[09:13] <kokey> put it in a mold and fill that with wax
[09:14] <kokey> tends to hold things together
[09:14] <kokey> might need a much bigger balloon tho
[09:15] <Lucasbuck> ok
[09:15] <Lucasbuck> glue gun the whole antenna fitting ?
[09:15] <eroomde> just stick it all to some plastic or som,ething
[09:15] <kokey> I'm joking
[09:16] <kokey> that reminds me, I must get some stolen telephone copper cable when I go on holiday in South Africa
[09:16] <Lucasbuck> yeah wax gave me childhood fears of icarus
[09:16] <kokey> that stuff used to be brilliant for light antennas
[09:16] <Lucasbuck> theres a metal scrap thing near where i live
[09:16] <Lucasbuck> im going to pop in there to see what copper they have
[09:17] <Lucasbuck> only need 2m of copper wire to play with
[09:17] <kokey> wax is what I used to use a lot during my childhood years that I didn't have any solder
[09:17] <kokey> would twist wires together, that worked for most cases since I got good at twisting, but wax helped to hold whole things together
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[09:17] <Lucasbuck> nice
[09:18] <Lucasbuck> just off topic for a sec, ive got some bear conductive ink thats fun
[09:18] <Lucasbuck> nice to play with and make resistive and projective capacative stuff
[09:18] <kokey> that's fun, now just need letraset components or something
[09:19] <kokey> hmmm, now my mind's gone a little mad with ideas of lego-like parts that goes in a breadboard like board
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[09:21] Action: kokey finds http://littlebits.cc
[09:31] <Lucasbuck> little bits
[09:31] <Lucasbuck> nice
[09:31] <Lucasbuck> yeah they are cool
[09:31] <Lucasbuck> you just gave me an idea though
[09:31] <Lucasbuck> why not just use conductive paint on existing lego bricks
[09:31] <Lucasbuck> hmm
[09:31] <Lucasbuck> god i need to either pause time or check out of my life for a year
[09:32] <eroomde> tell me about it
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[09:33] <kokey> yeah I could do with a lot of that too
[09:34] <kokey> and the ideagasms are quite big when I have a pile of boring work to get through
[09:43] <Lucasbuck> same :(
[09:45] <UpuWork> hey navrac_work
[09:46] <navrac_work> hi upu hows it going
[09:46] <UpuWork> well back at work so...
[09:46] <UpuWork> not that bad )
[09:46] <UpuWork> :)
[09:46] <UpuWork> hows the RFM22B thing coming along ?
[09:46] <navrac_work> i just spent two days in the dark in the o2 arena so im glad to be back at my desk]
[09:47] <UpuWork> oh
[09:47] <navrac_work> im just ordering some more components so i can build a final prototype tomotrrrow and give a final temperature test over the weekend
[09:47] <UpuWork> ok let me know if there is anything I can help with
[09:47] <UpuWork> I'm interested in it
[09:49] <navrac_work> well it seems pretty stable, domino is ok, just going to improve the pwm filtereing a bit and change some of the ratios of values to give better temperature performance - but in principle its fine - better overall stability that the rfm (although not as good as it was with a tcxo) and all 1.8v compatible with minimal current draw
[09:51] <navrac_work> 5 resistors,4 caps,1 varicap,1 xtal and two dil soic ic's
[09:51] <navrac_work> 1 of the R's needs to be a multi turn variable
[09:52] <navrac_work> about 3cm^2 of board space at a guess - but nothing heavy!
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[10:03] <navrac_work> I wonder if you could use an rfm to make a bfo so you could decode ssb on an am/fm rig
[10:03] <UpuWork> got a circuit and bill of materials ?
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[10:07] <navrac_work> will try to get the final cct and bom drawn up this weekend
[10:09] <navrac_work> got to change the op amp for one that works better at 1.8v - all my testing is currently at 3v3
[10:09] <UpuWork> ok, I'm interested to see what I can squish it down too
[10:11] <navrac_work> which programmer did you say you used?
[10:12] <navrac_work> i thought id get one so i can play 1.8v too
[10:14] <UpuWork> the Olimex one
[10:14] <UpuWork> http://www.coolcomponents.co.uk/catalog/isp500-programmer-p-145.html
[10:14] <UpuWork> that one
[10:16] <navrac_work> thanks
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[10:17] <navrac_work> ill get that ordered then
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[10:20] <navrac_work> http://www.ebay.co.uk/itm/Olimex-AVR-ISP500-atmel-STK500-V2-AVR-programmer-/280976227968?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item416b7cfe80
[10:21] <UpuWork> same one
[10:21] <UpuWork> direct from Olimex
[10:21] <navrac_work> excellent,
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[10:23] <navrac_work> ordered
[10:23] <UpuWork> and boom another £21 gone
[10:23] <UpuWork> my wife thinks I'm having an affair with someone called *paypal
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[10:24] <navrac_work> do you have a part number by any chance for a 4mhz xtal that will fit on a pro mini - i thought i'd retrofit one and a new vreg to make a 1.8v pro mini for testing
[10:25] <UpuWork> is it a normal half height HC/49 ?
[10:25] <UpuWork> checking
[10:25] <UpuWork> ah thats going to be an issue
[10:28] <UpuWork> 10p says there is no 4Mhz variant
[10:28] <UpuWork> checking now
[10:32] <UpuWork> CSTCE8M00G55-R0
[10:33] <UpuWork> doesn't go less than 8Mhz
[10:35] <navrac_work> oh well
[10:35] <UpuWork> the ones that do go down to 4Mhz are all larger
[10:35] <UpuWork> which is why I ended up using a full sized HC/49 on mine
[10:35] <UpuWork> http://www.murata.com/products/catalog/pdf/p17e.pdf Page 5
[10:35] <cuddykid> "UpuWork: my wife thinks I'm having an affair with someone called *paypal" - haha
[10:35] <mattbrejza> can you put on a faster crystal and enable the /8 divider?
[10:35] <UpuWork> http://uk.farnell.com/jsp/search/browse.jsp?N=2031+202542&Ntk=gensearch&Ntt=smd+resonator+4mhz&Ntx=mode+matchallpartial
[10:36] <UpuWork> interesting
[10:36] <UpuWork> 32Mhz crystal
[10:36] <mattbrejza> well you dont have to run at 4MHz
[10:36] <cuddykid> UpuWork: is it possible to unsolder a MAX 6? Or would that just be asking for trouble?
[10:36] <mattbrejza> <=1MHz is fine?
[10:36] <UpuWork> yes you can do it
[10:36] <Randomskk> cuddykid: with a hand iron or with hot air?
[10:37] <UpuWork> to run @ 1.8V AVR has to be 4Mhz or less
[10:37] <UpuWork> hot air works cuddykid
[10:37] <cuddykid> Randomskk: urm, I wouldn't attempt it as I know I'd destroy it - would ship it to Upu or get someone more capable that myself! :P
[10:37] <cuddykid> good stuff
[10:37] <UpuWork> sigh... you have my address
[10:37] <UpuWork> why anyway ?
[10:37] <Randomskk> with hot air it'd be pretty easy
[10:38] <mattbrejza> the core has to be at 4MHz, but straight after the crystal oscillator is a /8 divider when enabled, so can the oscillator run fine at say 8MHz from 1.8V wit hthe core then running at 1MHz?
[10:38] <UpuWork> I think that would possibly work ?
[10:38] <cuddykid> UpuWork: it's not urgent - just wondered if the MAX6 that I currently have (one of your chip antenna pcbs) could be reused
[10:39] <mattbrejza> tbh running at 8MHz @ 1.8V will probably just work
[10:39] <mattbrejza> but looking at hte datasheet for the oscillator data might be useful
[10:39] <UpuWork> possibly or you could just buy another
[10:39] <cuddykid> yeah, could do
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[11:14] <kokey> I was on another channel, thinking I was on this one
[11:14] <kokey> and I was wondering who the hell wants to use ZFS and RAID on their payloads
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[11:21] <fsphil> a raid of SD cards for recording SDR output :)
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[11:24] <griffonbot> Received email: James Coxon "[UKHAS] UK launches this weekend"
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[11:28] <griffonbot> Received email: gonzo_ "[UKHAS] Re: Ofcom Update: GPS Jamming Notice"
[11:33] <eroomde> jesus
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[11:33] <eroomde> that's a lot of shit they're spitting out
[11:33] <eroomde> i was wondering exactly what 'jamming' was for gps
[11:33] <eroomde> cw - boring but ok it'll probably work
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[11:34] <fsphil> I wonder what the point is
[11:34] <eroomde> bpsk - that could be also just a loud thing like cw or it could be more clever like being spoof sattelites
[11:34] <eroomde> noise - just raising the noise floor
[11:34] <eroomde> presumably by quite a lot
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[11:39] <SpeedEvil> meaconing is the term for intentional jamming while pretending to be a sat
[11:39] <SpeedEvil> indeed
[11:39] <SpeedEvil> GPS is 50w/hemisphere from the sat
[11:39] <Darkside> probably for interference cancellation research
[11:39] <Darkside> there was a lot of that going on at the university of bath
[11:40] <SpeedEvil> coding gain gets that to 50kw/1Mw depending on assumptions
[11:40] <SpeedEvil> and even 1Mw is easy to beat, spread out over 10^13 m^2
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[11:41] <SpeedEvil> (but if you broadcast even the most simple coded jamming signal, much of even that gain gets stripped away
[11:45] <mattbrejza> btw Darkside, any idea of a figure for N0 for the rtl dongles?
[11:46] <Darkside> uhmm
[11:46] <Darkside> depends on the gain setting
[11:46] <mattbrejza> yea suppose it would
[11:46] <mattbrejza> i wonder if its stated in the datasheet, that would have been a good start
[11:46] <Darkside> ahh wait
[11:46] <Darkside> i have the datasheet
[11:47] <Darkside> 3.8dB at UHF
[11:47] <Darkside> i.e. crap
[11:47] <gonzo__> luckilly most of these cheapo jammers avail on the internet are just a few mW of CW
[11:47] <Darkside> mattbrejza: put a better LNA in front of it, turn the gain in the dongle right down
[11:47] <mattbrejza> now to convert noise figure to N0
[11:47] <Darkside> and that'll give you the best performance
[11:47] <mattbrejza> yea that was going to be the second thing to calculate
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[11:48] <Darkside> well, theres not that much to calculate
[11:48] <Darkside> the PSA4-5043's have a NF of 0.7dB
[11:48] <mattbrejza> yea i know its not hard
[11:48] <Darkside> stick that in front of it
[11:48] <Darkside> and thats about the noise figure
[11:49] danielsaul (~danielsau@99.198.122.28) got lost in the net-split.
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[11:49] <Darkside> you just back the E4000's 'LNA' right off
[11:49] <mattbrejza> N0 is just the thermal noise + noise figure of the reciever right?
[11:49] <Darkside> not sure
[11:49] <Darkside> if you had the right equipment you could measure it
[11:50] <mattbrejza> might have to ask people nicely for that one
[11:50] <Darkside> hehe IP3 point is 5dBm
[11:50] <Darkside> at minimum gain
[11:50] <Darkside> another reason for putting something better in front of it
[11:50] <mattbrejza> yea
[11:50] <Darkside> my supervisor bought a bunch of helical filters for 2m
[11:51] <Darkside> we've been tuning them up as frontends for these dongles - those ones have the LNA at the front
[11:51] <mattbrejza> they better than SAW (in terms of loss and bandedge)?
[11:51] <Darkside> hah no
[11:51] <Darkside> but they are more available
[11:51] <mattbrejza> oh
[11:51] <Darkside> and are tunable
[11:51] <mattbrejza> ah
[11:52] <mattbrejza> i suppose ill try N0 = thermal + noise figure for now
[11:52] <Darkside> we ended up with a 6MHz bandwidth, which we positioned to the top of it was over 147MHz
[11:52] <mattbrejza> seems about right
[11:52] <Darkside> so by 148MHz it's down to about -20dB
[11:53] <Darkside> oh wait
[11:53] <Darkside> hmm wait yeah that sounds about right
[11:53] <Darkside> i have notes on this..
[11:53] <mattbrejza> what are you actually trying to achieve long term, or atm currently just messing around?
[11:54] <Darkside> this is jut as a frontend for amateur radio use
[11:54] <Darkside> and for use with things like a USRP
[11:54] <Darkside> we had to order some helicals for another purpose (DAB research stuff) and there was a minimum order
[11:54] <mattbrejza> oh i see
[11:54] <Darkside> so we bought some amateur band helicals to make up the minimum order
[11:56] <mattbrejza> mind you is the antenna and coax a source of noise?
[11:56] <mattbrejza> they are resistive after all
[11:56] <Darkside> i think the thermal noise of the antenna and coax will be negligible
[11:56] <Darkside> local noise would dwarf it i think
[11:57] <SpeedEvil> Darkside: opportunistic radar - dab?
[11:57] <mattbrejza> bbiab lunch time
[11:57] <Darkside> been and done that lol
[11:57] <mattbrejza> thanks Darkside
[11:57] <Darkside> SpeedEvil: water vapour measurements
[11:58] <SpeedEvil> Ah(2O)
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[12:18] <number10> eroomde: MotD http://www.youtube.com/watch?v=S06MN10j2Xg
[12:24] <cuddykid> lovely, just got a whopping java coursework - build a http (1 fortunately) web server
[12:26] <fsphil> funny, I'm doing just that in c# atm
[12:26] <jonsowman> 'funny' doesn't sound like the right adjective
[12:27] <fsphil> it's a nice learning exercise
[12:27] <fsphil> and I'll take c# over vb any day :)
[12:27] <cuddykid> I guess :)
[12:27] <jonsowman> yeah that's true
[12:28] <DanielRichman> bit of a loose task description
[12:29] <DanielRichman> just build something that listens on socket, accepts connections, replies 200 HTTP/1.0\r\n\r\nNothing to see here
[12:29] <cuddykid> well, it's broken down into 3 parts
[12:29] <DanielRichman> and closes the connection
[12:29] <cuddykid> it's reasonably guided
[12:29] <DanielRichman> this may require tweaking to make it practical >_>
[12:29] <cuddykid> lol
[12:29] <jonsowman> no I think that encompasses all possibly required functionality DanielRichman
[12:30] <Randomskk> python -m SimpleHTTPServer
[12:30] <DanielRichman> actually I think it would even be doing some parts of the internet a service
[12:30] <fsphil> yes
[12:31] <fsphil> shame you have to use java
[12:34] <cuddykid> yep
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[12:38] <fsphil> I keep reading that nick as "grumble list"
[12:38] <fsphil> I have a large grumble list
[12:40] Action: SpeedEvil sighs, and ponders trying to understand what the conditions are for requesting a judicial review by the court of session, of an upper tribunal decision,
[12:41] Action: SpeedEvil decides to go back to bed.
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[12:45] <Laurenceb> RS Stock No.: 769-2091
[12:45] <Laurenceb> buy buy buy
[12:46] <Laurenceb> 30 in stock for next day delivery - back order for despatch 11/01/2013 for delivery within 1 working day(s)
[12:46] <Laurenceb> eeek
[12:48] <fsphil> guessing that's a good deal
[12:48] <Laurenceb> im tempted to buy the entire stock and resell
[12:48] <number10> is there a free c compiler for that
[12:48] <Randomskk> yes
[12:48] <Randomskk> gcc
[12:49] <fsphil> easy to program it from linux?
[12:49] <number10> tnx
[12:49] <Laurenceb> fsphil: yes
[12:49] <Laurenceb> i use stm for _everything_
[12:51] <fsphil> I can't remember my rs username, been years :)
[12:53] <fsphil> anything else I need to get with it?
[12:54] <Laurenceb> usb cable?
[12:54] <Laurenceb> :P
[12:54] <fsphil> nah, loads of those
[12:54] <jonsowman> my old F0 discovery board came with a USB cable
[12:54] <jonsowman> not sure if these do
[12:54] <zyp> Laurenceb, except it's completely unsupported on linux until somebody adds support for it to texane-tool :p
[12:54] <fsphil> so there isn't like a programmer like the avr
[12:54] <Laurenceb> yes
[12:54] <jonsowman> fsphil: built in on that board
[12:54] <fsphil> sweet
[12:54] <jonsowman> it has the st-link programmer/debugger onboard
[12:55] <eroomde> number10: thanks!
[12:57] <Laurenceb> http://hackaday.com/2012/09/27/stm32-f4-discovery-tutorial-using-open-source-tools/
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[13:08] <mfa298> fsphil: if you need to get your username for rs back give them a call. I thought I had a username with them but didn't know the email or password, quick call and it all got sorted.
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[14:09] <fsphil> ta mfa298, did just that and all going again
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[14:13] <m0psi> is the idea of small hab that is set NOT to burst, floating around the globe (until all the helium leaks out) getting power from solar; too mad/stupid?
[14:14] <eroomde> no
[14:14] <fsphil> there's been a couple
[14:14] <fsphil> but none by amateurs
[14:14] <m0psi> oh
[14:14] <fsphil> yet
[14:14] <m0psi> exactly!
[14:14] <m0psi> here is the next part; what if there was a network of them?
[14:15] <russss> I believe the US government had that idea in the early 60s and then satellites were invented
[14:16] <m0psi> y, but these are MUCH cheaper and re-placable, than sats
[14:16] <russss> a lot of the problem with balloons is reliability.
[14:16] <m0psi> i'm thinking 'numbers' would beat 'reliablity'
[14:17] <fsphil> they wouldn't have the coverage of sats
[14:17] <russss> dan bowen gave a great talk about this at the UKHAS conference. I don't know if he's put his slides up
[14:17] <fsphil> satellites can be much heavier too
[14:17] <russss> the other issue with superpressure balloons is that they will sink if it rains, even down to ground level
[14:17] <russss> so rain is kind of a big issue
[14:17] <fsphil> yes, I was amazed to learn that some of them actually landed in the ocena
[14:18] <fsphil> ocean*
[14:18] <m0psi> not much rain at altitude though
[14:18] <fsphil> and then ascended again once they warmed up
[14:23] <DrLuke> this wikipedia article is really odd: http://en.wikipedia.org/wiki/Current-to-voltage_converter
[14:23] <DrLuke> it's as if it's made for children
[14:24] <Laurenceb> http://en.wikipedia.org/wiki/File:I-to-v_building_1000.jpg
[14:24] <Laurenceb> i lolled
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[15:00] <kokey> any nice alternatives for gnuplot around lately?
[15:01] <eroomde> matplotlib if you're happy in the python ecosystem
[15:02] <eroomde> but i agree with you in that a nice general cli friendly plotting program would be good
[15:02] <eroomde> which could do nice renderings, 3d stuff more easily, and actually try and render every point in an n-million point dataset
[15:02] <russss> matplotlib is more fiddly than gnuplot IMO
[15:02] <eroomde> sorry, *not* actually try and render
[15:02] <eroomde> or at least, use hardware acceleration or something
[15:03] <eroomde> cos plotting any dataset with a few million points seems to bring by reasonably decent desktop (i7, 16GB ram) to its knees
[15:03] <eroomde> my*
[15:03] <eroomde> yes matplotlib is quite fiddly
[15:03] <eroomde> but can look pretty
[15:08] <eroomde> splendid
[15:10] <eroomde> chaps - easiest way to transfer about 500MB to someone who i can't directly shell into
[15:10] <russss> dropbox
[15:11] <eroomde> i'll have to delete some stuff out
[15:11] <eroomde> well, moce it out
[15:11] <eroomde> move*
[15:11] <eroomde> but yes good diea
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[15:12] <mattbrejza> i would put the file on a web server
[15:12] <mattbrejza> if you have one avaliable oc
[15:13] <eroomde> well, kraken. but that might be abusing upu a little
[15:14] <mattbrejza> doesnt that server dl a massive amount every time someone runs a prediction?
[15:17] <eroomde> yes but i mean in the sense of using it for personal things
[15:18] <MLow> so what are the chances if I rend a party balloon tank that I will get good helium
[15:18] <MLow> i have this thing in the back of my mind saying (it's AIR)
[15:18] <eroomde> 3:7 each way
[15:18] <mattbrejza> oh i see, yea good point
[15:19] <eroomde> it's sharing a dataset from my gps front end
[15:19] <eroomde> with a friend who i did some hacking with of soft receivers over the weekend
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[15:19] <mattbrejza> well there are plently of megaupload style websites still around
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[15:19] <mattbrejza> rapidshare etc
[15:21] <eroomde> will have a thunk
[15:22] <daveake> CD in the post
[15:22] <DanielRichman> *floppy disks
[15:22] <mattbrejza> email
[15:22] <mattbrejza> split into 20 files
[15:23] <eroomde> ok thanks all
[15:23] <eroomde> i shall consider all of these suggestions on their own merits
[15:23] <daveake> lol
[15:23] <daveake> IIRC Thunderbird now has intergration with a couple of file upload sites
[15:23] <daveake> Not including dropbox, sadly
[15:23] <eroomde> given it's a 1 but sample packed into a byte from this thing, gziup should easily be able to compress it to 1/8th original
[15:23] <eroomde> which will help
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[15:23] <eroomde> 1 bit sample*
[15:24] <daveake> *integration
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[15:35] <MLow> ugh
[15:35] <MLow> hyrdrogen prices are even harder to nail down
[15:35] <MLow> everywhere i call doesnt carry it or requires past experience hanlding it before even telling me a price
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[15:38] <eroomde> so say yes you do have experience handling it
[15:39] <UpuWork> absuing me ?
[15:39] <UpuWork> meh
[15:39] <UpuWork> abusing
[15:39] <UpuWork> there is no bandwidth
[15:39] Action: UpuWork makes hand swishing motion
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[15:41] <Randomskk> hey UpuWork
[15:41] <UpuWork> hello
[15:41] <Randomskk> today I chatted with the guy who wrote the firmware and designed the asics for the iridium modem on the rockblocks
[15:41] <UpuWork> ok
[15:41] <Randomskk> :o
[15:41] <Randomskk> he was quite proud of it apparently
[15:41] <UpuWork> good :)
[15:41] <Laurenceb> i would hope he would be
[15:42] <UpuWork> they are shipping soon
[15:42] <Laurenceb> thats one serious piece of work
[15:42] <Randomskk> but it involved SPARC assembler
[15:42] <Laurenceb> omfg
[15:42] <Laurenceb> wait it has an embedded sparc?
[15:42] <Randomskk> mm
[15:42] <Laurenceb> insanity
[15:45] <UpuWork> whats a sparc ? :/
[15:46] <jonsowman> !g sparc+isa
[15:47] <jonsowman> hmm
[15:47] <jonsowman> there's some bedtime reading
[15:48] <eroomde> an oldschool type of processor developed by (i think) sun
[15:49] <eroomde> probably still various bank mainframes in armoured datacentres running sparc systems with solar-system sized support contracts
[15:51] <eroomde> Randomskk: was he cool?
[15:51] <eroomde> do you think he might donate a couple of systems if they went sort of quite high?
[15:52] <Randomskk> he works for cambridge consultants
[15:52] <Randomskk> he was medium-cool
[15:52] <eroomde> say there was a black project within a black project to rescue hardware that the outer black project was just going to let land in the atlantic ocean unrecoevered?
[15:52] <Randomskk> I don't know if he'd really be in a position to give you any but who knows
[15:52] <Randomskk> turns out cambridge consultants do all the ground side hardware for iridium
[15:52] <Randomskk> they also had an iridium based broadband rig there
[15:52] <Randomskk> somewhat bigger PCB
[15:52] Nick change: Guest76618 -> danielsaul_alt
[15:53] <Randomskk> 150kbit/s on that, and the next gen stuff is being worked on now, 1.5MBit/s
[15:53] Nick change: danielsaul_alt -> danielsaul
[15:59] <eroomde> sorry connection timed out on the bus
[16:00] <Randomskk> I am now ready to begin my project
[16:00] <Randomskk> https://www.dropbox.com/s/vbax49bzb4uac08/2012-10-18%2016.57.18.jpg
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[16:00] <eroomde> jesus adam
[16:00] <eroomde> empty-framed black glasses too?
[16:00] <Randomskk> hahaha
[16:00] <Randomskk> I was tempted
[16:00] <Randomskk> it was this or a moleskine
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[16:01] <Randomskk> I'm mostly looking forward to handing it in at the end of the year
[16:01] <SP9UOB> Hi all
[16:02] <eroomde> have ytou got some nice rotrig technical pens?
[16:03] <Randomskk> atm a pilot V5 hi-tecpoint which I am enjoying a bit
[16:03] <Randomskk> but might just use my pilot fountain pen for this
[16:03] <Randomskk> rotring would be nice of course. maybe one day.
[16:04] <MLow> has anyone done this to test a payload: fly a kite with a string connected on a ring in the center of mass, hoist up their payload
[16:04] <Randomskk> anyway bbl actual work
[16:04] <MLow> its a windy day, i think i want to try this
[16:06] <SP9UOB> The end is near!!! http://sp9uob.verox.pl/the_end.jpg ;-)
[16:06] <eroomde> MLow: i'm sure some people have
[16:06] <eroomde> i have not
[16:06] <eroomde> give it a go
[16:08] <MLow> i mean all i need to lift is 1kg payload
[16:09] <MLow> could get tricky messing with the harness, might need to take a friend
[16:09] <MLow> some beers will lure the friend...i guess we might as well make a day of it..
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[16:11] <MLow> toys r us doesnt have kites
[16:11] <MLow> wtf do kids play with nowadays
[16:13] <Laurenceb> jimmy savile
[16:16] <MLow> who?
[16:17] <MLow> i looked up some recommended kites for KAP(kite arial photo) and the sizes they use are huge
[16:17] <MLow> 9foot kites
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[16:37] <number10> Randomskk: who were you speaking to?
[16:37] <number10> at camcon?
[16:51] <m0psi> hi all, i've ordered this gps module, and now i want get a couple of arduinos for the kids to play with. I'm aware there are lots of arduino versions. can anyone point to a cheap mode that works well with this gps module please?
[16:51] <m0psi> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=68
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[16:55] <Upu> hey m0psi
[16:55] <m0psi> hey upu
[16:55] <Upu> that module works with either the Uno or the 3.3V versions
[16:56] <Upu> for ease use the Uno
[16:56] <Upu> http://arduino.cc/en/Main/ArduinoBoardUno
[16:56] <m0psi> that's the branded version
[16:56] <Upu> yep
[16:56] <m0psi> i was hoping to get a cheap one
[16:56] <Upu> its only £20 or so ?
[16:57] <m0psi> i've got a freeduino
[16:57] <Upu> http://www.coolcomponents.co.uk/catalog/seeeduino-atmega-328p-arduino-compatible-board-p-871.html
[16:57] <m0psi> y, i'm trying to keep the cost down, so that i can encourage the school to buy 5
[16:57] <m0psi> so that the kids can play with them
[16:57] <Upu> http://www.coolcomponents.co.uk/catalog/arduino-revision-p-583.html
[16:58] <m0psi> when the kids realise how cheap they are/can be, the higher chance of them 'playing'
[17:00] <KT5TK> Let them have an original Arduino first, so that everything works out of the box
[17:00] <KT5TK> Later they can switch to the cheap models
[17:01] <Upu> only £3 difference in Uno and Seeduino
[17:01] <KT5TK> when they understand what they're doing
[17:01] <Upu> Arduino boards are pretty bomb proof
[17:01] <Upu> note I said bomb not kid
[17:01] <m0psi> ok ok ::-)
[17:01] <m0psi> i'll get the school to get two uno's
[17:03] <m0psi> this is the one i have http://www.nuelectronics.com/estore/index.php?main_page=product_info&products_id=1
[17:03] <m0psi> supposidly a copy of the uno
[17:05] <m0psi> oh, i just realised it's sold out! :-(
[17:05] <m0psi> i'll send send them the uno link and be done
[17:05] <m0psi> not much in it really
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[17:13] <m0psi> upu: this looks to be the same version you mentioned, agreed?
[17:13] <m0psi> http://uk.farnell.com/arduino/a000066/eval-atmega328p-8bit-uno-rv3/dp/2075382
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[17:20] <KT5TK> Yes, it's the same Uno
[17:28] <m0psi> thanks kt5tk
[17:28] <KT5TK> It's good to have at least one original Arduino for reference purpose. Later the kids may just buy the ATMEGA chip and build their own electronics around it. Still they can use the UNO board to program the chip and to check if something doesn't work.
[17:29] <m0psi> y, for sure
[17:29] <m0psi> got to give them instant 'win', and then the reality can come later :-)
[17:32] <Upu> yep sorry m0psi was out walking the dog
[17:32] <SpeedEvil> https://www.youtube.com/watch?v=THhOp95HM8c&feature=youtube_gdata_player meanwhile, in Finland.
[17:49] <m0psi> np upu, where ever you, or your dog is :-)
[17:49] <Upu> at home in the dry now
[17:49] <m0psi> i meant in gps terms
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[18:00] <m0psi> ok spot the difference comp; what is the difference between these two arduinos, as far as running with the gps:
[18:00] <m0psi> No. 66: http://uk.farnell.com/arduino/a000066/eval-atmega328p-8bit-uno-rv3/dp/2075382
[18:01] <m0psi> No. 46: http://uk.farnell.com/jsp/search/productdetail.jsp?SKU=1848687&MER=baynote-1848687-pr
[18:01] <zyp> price.
[18:01] <m0psi> ok, that is a good difference
[18:03] <m0psi> actually, i can see slight layout differnce, but is there going to be a difference for running it with the uBlox gps module?
[18:03] <m0psi> 46 has a reset switch, 66 not
[18:03] <m0psi> yes it does, near the usb
[18:04] <m0psi> ok, need you guys to give the thumbs pls
[18:08] <Upu> both are good
[18:08] <Upu> just different revisions
[18:09] <Upu> no difference for running a GPS module
[18:09] <m0psi> good answer upu, thanks
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[18:10] <Lunar_Lander> hello
[18:10] <Lunar_Lander> headache
[18:10] <Lunar_Lander> not good
[18:13] <fsphil> they never are
[18:14] <Lunar_Lander> yea
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[18:39] <arko> oh man this coffee is strong
[18:45] <fsphil> we got a new hot drinks machine at work this week. the chocolate is great. it apparantly does coffee too
[18:45] <arko> :O
[18:45] <arko> engineers can't function without coffee
[18:46] <fsphil> it's not true! it has you under its evil spell :)
[18:46] <arko> haha
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[18:55] <Randomskk> number10: steve haigh
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[19:02] <SP9UOB> VORTEX2 ride over europe :-) \
[19:06] <Lunar_Lander> arko, cool, here in this city is a coffee company called Arko
[19:06] <Lunar_Lander> :)
[19:06] <arko> haha!
[19:06] <arko> thats awesome
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[19:06] <arko> isn't there a chocolate company called arko?
[19:07] <arko> my gf came back from germany with arko chocolate last year
[19:07] <number10> evening jcoxon
[19:07] <jcoxon> evening
[19:07] <Upu> evening
[19:07] <jcoxon> hey number10
[19:09] <number10> yes medium cool Randomskk
[19:09] <arko> afternoon
[19:09] <Randomskk> hah, do you know them?
[19:09] <number10> yes - work there
[19:10] <jcoxon> number10, we've got permission for 4 launches this weekend
[19:10] <Randomskk> ah yes, I think you've told me
[19:10] <jcoxon> wanna come along?
[19:10] <Randomskk> small world
[19:10] <number10> yes please jcoxon
[19:11] <jcoxon> got anything you want to launch?
[19:11] <number10> Randomskk: I am less than medium cool so i probably shouldnt comment
[19:12] <number10> jcoxon: I do have some trackers and a payload box + balloons - not sure if predictions look good for recovery
[19:12] <Randomskk> number10: what kinda area do you work in?
[19:13] <number10> Randomskk: just test systems - not really the cutting edge of the company
[19:13] <jcoxon> number10, indeed that is true
[19:13] <jcoxon> number10, meet at the barn at 1430 on sat
[19:14] <jonsowman> i wouldn't go number10, I've heard bad things about this jcoxon character ;)
[19:14] <number10> jcoxon: great - will be there
[19:14] <number10> lol jonsowman - been there before - he is not that bad ;)
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[19:15] <jonsowman> :)
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[19:15] <number10> was it some sort of recruitment thing you met him at Randomskk ?
[19:18] <Randomskk> yea
[19:18] <Randomskk> engineering soc careers fair thing
[19:18] <Randomskk> I was kinda hoping it'd be lots of cambridge area cool startups
[19:18] <Randomskk> but it was basically all the names you'd expect
[19:18] <number10> shame
[19:18] <Randomskk> arm, selex, detica, that crowd
[19:18] <Randomskk> plus some construction area people
[19:18] <Randomskk> all the big corps and consultancies basically
[19:19] <number10> you have a job lined up anyway as far as I can remember
[19:19] <Randomskk> not really
[19:19] <Randomskk> well I mean the company I've worked for over the summer offered me a job
[19:19] <Randomskk> but I declined for the time being
[19:20] <Randomskk> so right now my future is undecided :P
[19:20] <number10> plenty of time, and you have the skills that a lot of companies would want
[19:20] <Randomskk> honestly ccl made a good effort but I'm still not sure I wanna work for a big company really
[19:20] <Randomskk> not that much time
[19:20] <Randomskk> need to apply for PhDs by december if I wanna do that
[19:20] <Lunar_Lander> arko, yeah chocolate and coffee
[19:21] <arko> :)
[19:21] <arko> i think it had rum in it
[19:21] <arko> i felt drunk
[19:22] <number10> do you have ideas for PhD Randomskk ?
[19:23] <Randomskk> no. in the words of the "Should I do a postgraduate course?" flyer, "am I just putting off choosing an occupation?"
[19:23] <Randomskk> not really sure what I want to do, but a PhD gives me another few years in cambridge, which would be nice
[19:23] <Randomskk> however I don't have any particular project ideas and it's too early to say if doing one as a follow-on from my MEng project would be sensible
[19:23] <DrLuke> heh, got 2 bags of electrolytic capacitors with my latest PCB from mitch...
[19:24] <jonsowman> DrLuke: can I expect several bags of resistors with my stencil?
[19:24] <DrLuke> probably :P
[19:24] <jonsowman> cool
[19:24] <Lunar_Lander> xD
[19:24] <DrLuke> I love those goodies
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[19:24] <DrLuke> they're pretty useful, I've alway been lacking caps
[19:24] <DrLuke> but I also always was too lazy to buy some
[19:25] <DrLuke> and mitch's aren't even the bad ones, they're rated for 105°C
[19:25] <DrLuke> Makes me wonder, if I'm paying to much, lol
[19:27] <Upu> So far I've had 2 lots of patch wires, 2 knives with snap off blades, 2 bags of caps, 1 bundle of assorted wires
[19:27] <SpeedEvil> and a partridge in a pear tree?
[19:27] <Upu> I was actually thinking that :)
[19:29] <fsphil> lol
[19:29] <DrLuke> I also got a mini breadboard and 2 bags of red and black wires
[19:29] <DrLuke> really handy
[19:29] <fsphil> I'm really missing out here
[19:29] <DrLuke> order PCBs like a crazy, aquire goodies
[19:29] <Upu> oh I got a mini breadboard too
[19:29] <Lunar_Lander> xD
[19:30] <Upu> using it now actually
[19:30] <DrLuke> it's really cute, and perfect for hooking up a small sensor
[19:30] <DrLuke> a NTX2 also fits into it perfectly
[19:30] <number10> Randomskk: it is difficult - and most jobs are not as fun as university
[19:31] <Randomskk> indeed
[19:32] <Randomskk> still kinda enamored with the concept of (co-)founding a startup or something. or joining a small one.
[19:32] <Randomskk> but I think that might just be not wanting to transition to a large company, given everything I've done before is in that kind of setting
[19:34] <MrScienceMan> http://www.google.com/about/datacenters/inside/streetview/
[19:34] <MrScienceMan> :x
[19:34] <Lunar_Lander> does he always put electronic stuff to the PCBs?
[19:35] <Upu> has on all my orders
[19:35] <Lunar_Lander> ah
[19:35] <Lunar_Lander> that's quite expensive for him
[19:36] <Upu> not really he gets them from the chinese electronics market
[19:36] <Upu> but a nice touch
[19:37] <DrLuke> yep
[19:37] <Lunar_Lander> ah
[19:37] <DrLuke> the caps certainly are a really really nice touch
[19:40] <number10> Randomskk: a startup, something like what was started 50 years ago where I work would be cool
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[19:43] <DrLuke> a startup that makes the kind of money sparkfun makes would be nice
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[19:49] <Lunar_Lander> sparkfun rocks!
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[19:57] <DrLuke> nah
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[19:58] <DrLuke> All Sparkfun does is sell stuff for a pretty generously marked up price
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[19:58] <Lunar_Lander> oh
[19:58] <x-f> they have published some good tutorials
[19:58] <Upu> they have to
[19:59] <Upu> its a business
[19:59] <Upu> if I did HAB supplies as a business you'd have pay five times as much for me to make it pay :)
[20:00] <DrLuke> ^ ;)
[20:01] <x-f> good thing it's your hobby :)
[20:02] <Upu> absolutely
[20:03] <Lunar_Lander> XD!
[20:03] <Lunar_Lander> Upu rocks!
[20:03] <Upu> Alphamicro want to do some PR on it no
[20:03] <Upu> now
[20:03] <Lunar_Lander> Upu rocks!
[20:04] <x-f> Upu, speaking of tutorials, the other day i was reading your tutorial on uBlox (http://ukhas.org.uk/guides:ublox6), where you switch it to 4800 baud rate - are there any benefits of lower baud rate for GPS?
[20:04] <Upu> Yes the reason I switch to 4800 is I was using software serial
[20:04] <Upu> SS isn't very good
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[20:04] <Upu> some might even say shit
[20:04] <Upu> but that would be rude
[20:05] <Upu> always wire the GPS to the hardware serial points if you can
[20:05] <x-f> it seem to work fine for me with SS and the default baud rate
[20:05] <x-f> seems*
[20:05] <Upu> have you TX'd yet ?
[20:05] <Upu> via the radio ?
[20:05] <x-f> i have increased SS's buffer tho
[20:05] <x-f> no, i'm waiting on it :)
[20:05] <Upu> ok
[20:05] <MrScienceMan> x-f: it was droppin some charaters for me
[20:05] <MrScienceMan> on 9600baud
[20:06] <Upu> well you might find you need to disable interupts when you TX
[20:06] <Upu> and they in turn starts to cause issues
[20:06] <Upu> check this out
[20:06] <x-f> ok, i'll keep that in mind, thanks
[20:06] <Upu> I currently have a payload on test
[20:06] <Upu> has a ublox on the the hardware
[20:06] <Upu> and an Adafruit GPS on SS @ 9,600bps
[20:06] <MrScienceMan> just use .end()
[20:06] <MrScienceMan> that would detach the interrupt
[20:06] <DrLuke> Upu: why not always wire it to the i2c port
[20:06] <DrLuke> ;)
[20:06] <Upu> the code assumes SS is crap and waits about 2 secs max for a string
[20:07] <Upu> then just carries on
[20:07] <MrScienceMan> ha!
[20:07] <DrLuke> I really have to release my code someday
[20:07] <Upu> i.e if it doesn't get something useful in 2 secs it just carries on with the max6
[20:07] <DrLuke> as a handy library
[20:07] <Upu> anyway
[20:07] <Upu> in the time the max has retured 125 strings
[20:07] <Upu> the ss powered adafruit has returned 59
[20:07] <Upu> which shows you how many it drops
[20:07] <DrLuke> :/
[20:07] <MrScienceMan> ubox6 library for habbing
[20:08] <MrScienceMan> sounds like a challenge
[20:08] <DrLuke> using ublox6 with i2c is really damn easy
[20:08] <x-f> quite a difference
[20:08] <DrLuke> and you even get the amount of characters in the buffer out of it
[20:08] <Upu> well cba with i2c at the moment
[20:08] <DrLuke> why?
[20:09] <Upu> a) its not wired on the board
[20:09] <Upu> b) see above
[20:09] <Upu> afk making a cuppa
[20:09] Action: MrScienceMan endless loop detected
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[20:10] <DrLuke> http://pastebin.com/LtqN1rS2
[20:10] <DrLuke> this is my i2c code
[20:11] <DrLuke> using a simple statemachine
[20:12] <DrLuke> you could also make it recusrively by adding a if(hi|lo) { readgps() } to make it read the ublox until everything has been read
[20:13] <DrLuke> actually you couldn't... whatever
[20:14] <Upu> does look nice and simple
[20:14] <Upu> however this is just a one off test
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[20:18] <DrLuke> hm?
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[20:19] <DrLuke> yeah as I said, you can do something like if ((hi<<8)|lo)>0 { readgps() }
[20:19] <DrLuke> so it'd recursively read it until the buffer is empty
[20:20] <Upu> Youtube broken for anyone else ?
[20:20] <DrLuke> are you using firefox?
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[20:20] <fsphil> didn't take long for google to go bust :)
[20:20] <SP9UOB> upu: 500 Internal Server Error
[20:20] <SP9UOB> Sorry, something went wrong.
[20:20] <SP9UOB> A team of highly trained monkeys has been dispatched to deal with this situation.
[20:20] <Upu> yeah so not just me
[20:20] <DrLuke> same here
[20:20] <SP9UOB> wait ill shut down ipv6 interface
[20:21] <Upu> oh good point
[20:21] <DrLuke> it also doesn't work on ipv4
[20:21] <Upu> oh
[20:21] <Upu> :)
[20:21] <SP9UOB> dosent work on ipv4
[20:22] <DrLuke> also I had an idea for a simple battery testing rig today
[20:22] <DrLuke> I will create a PCB over the weekend
[20:22] <SP9UOB> hmmm the end is near Youtube is down ;-) http://sp9uob.verox.pl/the_end.jpg
[20:22] <Upu> lol yup
[20:22] <DrLuke> haha
[20:22] <DrLuke> google is still up
[20:22] <DrLuke> so it can't be that near
[20:22] <fsphil> lol
[20:22] <fsphil> someone's googled google
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[20:23] <DrLuke> oh man I sometimes do that
[20:23] <SP9UOB> DrLuke: 21 st Dec as i recall
[20:23] <DrLuke> :P
[20:23] <DrLuke> fsphil: sometimes I google google to get to google to google something else
[20:24] <fsphil> sometimes I like to leave elgoog.im opened on one of my screens at work
[20:24] <DrLuke> haha
[20:25] <DrLuke> the bottom part isn't mirrored
[20:25] <DrLuke> what is this blasphemy
[20:25] <bbjunkie> plastered with ads :(
[20:25] <DrLuke> the non plus ultra would be if the cursor also was mirrored
[20:25] <bbjunkie> those flash ads with audio are a PITA
[20:26] <DrLuke> youtube is fixed
[20:26] <fsphil> I don't browse the web without adblock+ :)
[20:27] <DrLuke> yeah
[20:27] <DrLuke> it's unfair to smaller sites who honestly depend on ad earnings
[20:27] <DrLuke> but oh well, what is one going to do
[20:28] <fsphil> text ads still get through
[20:28] <fsphil> and I don't mind those
[20:29] <fsphil> "between 07:00 AM - 19:00 PM" ... oh dear tesco
[20:31] <DrLuke> welp
[20:31] <DrLuke> time to get some sleep
[20:31] <DrLuke> only 6 measely hours left until I got to get up...
[20:31] <DrLuke> night all
[20:31] <fsphil> euuu
[20:31] <fsphil> nite
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[20:34] <Lunar_Lander> gn8 DrLuke
[20:35] <Lunar_Lander> btw according to the arduino website, Arduino Due will be released on the 22nd
[20:35] <fsphil> dual core? :)
[20:35] <Lunar_Lander> xD that would be nice
[20:35] <Lunar_Lander> it will be that ARM chip
[20:36] <Upu> ARM
[20:36] <fsphil> oh sweet
[20:36] <Upu> 4 UARTS
[20:36] <Upu> http://hackaday.com/tag/arduino-due/
[20:36] <fsphil> this is why I have no money
[20:37] <Upu> http://hackadaycom.files.wordpress.com/2012/10/due.pdf
[20:37] <fsphil> 96Kb of memory
[20:37] <fsphil> mmmmm
[20:37] <jonsowman> only 4?
[20:37] <fsphil> KB even
[20:37] <jonsowman> a mega has 4
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[20:37] <Upu> 512kb
[20:37] <Upu> thats SRAM
[20:37] <fsphil> yea
[20:37] <fsphil> sram is the important bit :)
[20:37] <fsphil> 250 KB flash
[20:37] <Upu> 2 analogue outputs DAC
[20:38] <fsphil> this thing will be amazing for generating signals
[20:38] <fsphil> could do TV without much problem
[20:39] <Lunar_Lander> real fast scan TV?
[20:39] <Lunar_Lander> like ATV?
[20:39] <fsphil> people do it on the AVR
[20:39] <fsphil> with limitations to be fair
[20:39] <jonsowman> stm32f4
[20:39] <fsphil> yea I've seen composite video being done on that too
[20:39] <fsphil> which reminds me, I never did order that
[20:50] <fsphil> there we go, yet another thing to add to my collection of things on my desk
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[21:01] <fsphil> naturally I forget to order the resistor I need
[21:01] <Lunar_Lander> oh
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[21:29] <Randomskk> hey eroomde, I need to write a snarky reply to someone but I will never reach the heady heights you so readily walk
[21:30] <Randomskk> you may have seen the email, he's an undergrad at loughborough who is going to do a rockoon for their final year project because balloons are too simlpistic
[21:30] <Randomskk> and has written asking for advice and funding
[21:30] <Randomskk> #
[21:30] <Randomskk> "This will be one of the first amateur low budget Rockoon missions to take place in the United Kingdom."
[21:32] <Lunar_Lander> XD
[21:34] <Laurenceb_> you think he is a n00b ?
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[21:35] <Randomskk> I don't think he has given the project as much thought as it would necessitate
[21:35] <Laurenceb_> does he have any idea how to actually launch it?
[21:35] <chris_99> stabilsing the rocket would be rather difficult i imagine?
[21:35] <Randomskk> I will attach several high altitude balloons on a separate rig attached to the rocket to take the system up to about 80000 ft..
[21:35] <Randomskk>
[21:35] <Randomskk> This is known as Cluster Ballooning. When the altimeter reaches a specific height the balloons will release be released and the rocket will be automatically ignited.
[21:36] <Randomskk> it sounds like he has a plan
[21:39] <Laurenceb_> erm
[21:39] <Laurenceb_> that will fail totally
[21:40] <Randomskk> I'm sure it all makes perfect sense in his head
[21:40] <Laurenceb_> i should make a spin stabilised estes rocket
[21:40] <Laurenceb_> but i have a huge list of such projects
[21:40] <Laurenceb_> stuff i need to get round to
[21:41] <Laurenceb_> i got 80Km with a 38Km launch in my rocket sim code
[21:41] <Laurenceb_> using Estes D motor
[21:41] <Laurenceb_> - heavily modified
[21:43] <Laurenceb_> *crickets*
[21:44] <Randomskk> gj
[21:46] <Laurenceb_> i guess i can just grab an F3discovery now
[21:46] <Laurenceb_> so theres slightly less work required to make a launch platform
[21:49] <Laurenceb_> and sparkfun are charging $125
[21:49] <Laurenceb_> https://www.sparkfun.com/products/10736
[21:49] Action: Laurenceb_ facepalm
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[22:00] Nick change: shenki_ -> shenki
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[22:21] <eroomde> yo
[22:21] <eroomde> eventide
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[22:29] <eroomde> HELLO
[22:29] <eroomde> ...ELLO...
[22:29] <jcoxon> yes yes eroomde
[22:29] <eroomde> ...ello...
[22:30] <eroomde> ...lo...
[22:30] <eroomde> splendid
[22:30] <eroomde> are you well jcoxon ?
[22:31] <Laurenceb_> HELLO IM ON THE INTERNET
[22:31] <jcoxon> not bad thanks
[22:31] <jcoxon> and yourself?
[22:31] <fsphil> congratulations
[22:31] <eroomde> i am well thinks
[22:31] <eroomde> just been at a fancy charity table/dinner/quiz do in hamersmith
[22:31] <eroomde> on the bus back
[22:32] <Laurenceb_> oxford tube?
[22:32] <Lunar_Lander> quiz = cool!
[22:33] <eroomde> Laurenceb_: yes
[22:34] <Laurenceb_> its too slow
[22:34] <eroomde> it's fine
[22:34] <eroomde> i like it
[22:34] <eroomde> it has wifi
[22:34] Action: Laurenceb_ hates busses
[22:34] <eroomde> how i am talking to you
[22:34] <eroomde> LALALALALA
[22:34] <Laurenceb_> :P
[22:34] <eroomde> thus it is demonstrated
[22:34] <eroomde> and it's comfy
[22:34] <eroomde> and it's 11 quid for a 2 day return
[22:35] <Laurenceb_> have you ordered an F3discovery?
[22:35] <Laurenceb_> thats not bad
[22:35] <eroomde> and it runs frequently and all night
[22:35] <eroomde> unlike trains
[22:35] <eroomde> where you *need* to catch ghe 10.45 or the 11.30
[22:35] <eroomde> which is just a load of bollocks
[22:36] <Laurenceb_> youll have to buy fast
[22:40] <eroomde> what do you mean?
[22:40] <Laurenceb_> the f3discovery
[22:41] <Laurenceb_> http://uk.rs-online.com/web/p/processor-microcontroller-development-kits/7692091/?searchTerm=f3discovery&relevancy-data=636F3D3226696E3D4931384E4B6E6F776E41734D504E266C753D656E266D6D3D6D61746368616C6C7061727469616C26706D3D5E5C772B2426706F3D313326736E3D592673743D4D414E5F504152545F4E554D424552267573743D6633646973636F766572792677633D424F544826
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[22:44] <Lunar_Lander> XD
[22:45] <fsphil> easy for you to say
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[22:57] <m0psi> sorry for the newbie question, but what is this f3discovery board? it seems to do everything but make tea! for such a low price. Is it basically used for aircraft/rocket guidance?
[22:58] <Laurenceb_> shhh
[22:58] <m0psi> oh dear
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[22:58] <Laurenceb_> dont tell everyone
[22:58] <Laurenceb_> yes it does
[22:58] <Laurenceb_> cortex M4 with FPU
[22:59] <Laurenceb_> and a magno, accel and gyro
[22:59] <Laurenceb_> all for £8.80
[22:59] <m0psi> is it fast enough for rocket speeds?
[23:01] <Laurenceb_> maybe
[23:01] <m0psi> amazing price, regardless
[23:02] <eroomde> what does that question even mean?
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[23:03] <m0psi> i guess i mean, does the infomation rate coming out of it, good enough to make course correction at the speed of rockets
[23:03] <eroomde> i think my question still stands :)
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[23:04] <eroomde> or aqt least, the answer is 'it depends'
[23:04] <m0psi> i could imagine it would be fast enough for aeroplanes. I take your point eroomde, but I don't know anyting about rocket speed variety to know
[23:05] <eroomde> well, it's more rocket dynamics than speed
[23:05] <eroomde> a big rocket take s alot longer to go wrong
[23:05] <eroomde> ]in an inertial sense
[23:05] <eroomde> than a small one
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[23:05] <m0psi> i guess even 'slow' rockets are quite fast. yes, i guess it is a matter of how agile you want it to be
[23:06] <eroomde> but the cortex m4 itself has 10000000x the processing power of the first guidance computers on orbital rockets
[23:06] <m0psi> what is 'cortex m4'?
[23:06] <eroomde> and the bandwidth of mems sensors nowadays can easily be hundred of Hz to kHz
[23:07] <eroomde> 9t's the arm chip of the discory board
[23:07] <eroomde> it's*
[23:07] <m0psi> ok
[23:07] <m0psi> y, it's a complicated question, i feel i just stepped on the 'silly mine' :-(
[23:08] <eroomde> it's very capacle
[23:08] <eroomde> 170+Mhz with ahrdware floating point unit and dsp instructions
[23:08] <eroomde> hardware*
[23:08] <eroomde> well, it's a difficult question to answer more than a silly one
[23:08] <eroomde> and i have had lots of free boose at this party so i type in a less guarded way tan usual
[23:09] <m0psi> y, but the sillyness is the 'scope' part. as you say, it depends.
[23:09] <eroomde> but it's a sort of high dimensional optimisation problem
[23:10] <eroomde> but it's always sobering to remeber as i try to, when i am struggling to get my code to run fast enough on some 100mhz arm chip, that the scout rockets reliabley reached orbit with a paper tape control system
[23:10] <m0psi> y, also sobering to think of the lunar lander control systems
[23:11] <eroomde> yes very
[23:11] <m0psi> is it not true though that the smaller the rocket is, the faster your controller system (as a whole) has to react, before you get into PIO
[23:12] <m0psi> pilot induced oscillations
[23:12] <m0psi> or even, just simply crashing
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[23:13] <eroomde> it's basically true yes
[23:13] <m0psi> in the sense that the a larger object would have a bigger momentum etc
[23:13] <eroomde> but it still only probably needs to be maybe 100hz to steer a highish performance model rocket
[23:14] <m0psi> ok, but you are referring to the cpu, rather than the control (transducer+actuator) cycles
[23:14] <eroomde> the control loop
[23:14] <eroomde> so 100 measure->control_inputs per second
[23:15] <m0psi> oh, hz, I read that as MHz
[23:15] <eroomde> what you want to do inside that 10ms dictates your cpu
[23:15] <m0psi> y, i get that. 10ms sounds about right
[23:16] <m0psi> well, this is enough giddy heights for the day.
[23:16] <m0psi> good to chat eroomde
[23:17] <m0psi> looking forward to meeting one day
[23:17] <m0psi> nn
[23:17] <eroomde> n
[23:19] Last message repeated 1 time(s).
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[23:23] <Laurenceb_> i have an EKF running at 100hz on an F1
[23:23] <Laurenceb_> was hoping for a bit more than that :P
[23:24] <eroomde> try it on an fpu
[23:24] <Laurenceb_> exactly
[23:25] <Laurenceb_> http://i.imgur.com/OvnHY.jpg
[23:25] <Laurenceb_> this doesnt look at all disturbed
[23:26] Action: Laurenceb_ zzz
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[23:40] <arko> lol
[23:48] <Lunar_Lander> xD
[23:48] <Lunar_Lander> arko, so you are from the UK or the US?
[23:48] <arko> US
[23:48] <Lunar_Lander> cool
[23:48] <arko> Los Angeles
[23:49] <Lunar_Lander> YAY!
[23:49] <Lunar_Lander> :)
[23:49] <arko> huzah!
[23:49] <Lunar_Lander> I am from Osnabruck, Lower Saxony, Germany
[23:49] <arko> oh sweet!
[23:49] <arko> Ich liebe dutcheland!
[23:50] <arko> did i misspell
[23:50] <Lunar_Lander> :)
[23:50] <arko> i dunno
[23:50] <Lunar_Lander> Deutschland
[23:50] <arko> oh damn
[23:50] <arko> move that e around
[23:50] <arko> haha
[23:50] <Lunar_Lander> no problem
[23:50] <Lunar_Lander> :)
[23:50] <arko> i was born in vienna actually
[23:50] <Lunar_Lander> :) cool
[23:50] <arko> its a beautiful place
[23:50] <Lunar_Lander> many people say that to me but I think Vienna is quite a distance from me
[23:50] <Lunar_Lander> I once went to Nuremberg using regional trains
[23:51] <Lunar_Lander> it took some 8 hours
[23:51] <Lunar_Lander> I think Munich is two hours farther
[23:51] <Lunar_Lander> so I don't think I could go to Vienna by that travel mode in one day
[23:51] <Lunar_Lander> :)
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[23:58] <Lunar_Lander> evening dave
[23:58] <Lunar_Lander> how are you?
[00:00] --- Fri Oct 19 2012