highaltitude.log.20120620

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[01:04] <joey> HEY BITCHES!
[01:04] Nick change: joey -> Guest87276
[01:04] <Guest87276> what?
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[01:15] <Guest87276> wHATS UP BITCHES
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[01:22] <BrainDamage> the sky
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[02:03] <dayz> hey noww
[02:03] <Darkside> heyy nowwww
[02:03] <Darkside> don't dreeeeeeam it's over
[02:05] <dayz> whats over?
[02:05] <Darkside> it's a song, silly
[02:06] <dayz> pfff i never heard of such nonsense
[02:07] <dayz> whats up?
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[02:07] <Darkside> dayz: not much
[02:08] <dayz> hey darkside, for your trackuino did you use the HX1 radio?
[02:08] <Darkside> yes
[02:10] <dayz> how did you like it? any issues?
[02:10] <Darkside> works fine
[02:10] <Darkside> all our aprs payloads use them
[02:10] <Darkside> http://rfhead.net/wp-content/uploads/2012/05/aprs_payloads.jpg
[02:10] <Darkside> you can
[02:10] <Darkside> you can't see them, but they're on the backs of those pcbs
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[02:11] <dayz> rfhead your site?
[02:11] <Darkside> yes
[02:12] <dayz> what freq for aprs do you use in australia?
[02:12] <Darkside> 145.175MHz
[02:13] <Darkside> had to get a few of the HX1 modules custom made
[02:13] <Darkside> cost about AUD$60 each
[02:13] <dayz> yea they are around $50 dollars here in US
[02:14] <dayz> thinking of getting one. I am gonna make my own PCB for the trackuino
[02:14] <dayz> pretty much just gonna use the APRS code
[02:14] <Darkside> we forked the trackuino code
[02:14] <Darkside> dont think the latest version is in our svn tho
[02:14] <dayz> what you mean forked?
[02:14] <Darkside> we added telemetry frames
[02:14] <Darkside> and are adding in compressed telemetry frames
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[02:17] <dayz> thats cool
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[06:05] <griffonbot> Received email: vk3jmc "[UKHAS] Re: SDR + Front End Filter/Amp"
[06:06] <griffonbot> Received email: Mark Jessop "Re: [UKHAS] Re: SDR + Front End Filter/Amp"
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[06:36] <UpuWork> morning
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[06:52] <jcoxon> morning UpuWork
[06:59] <griffonbot> Received email: Mark Drayton "Re: [UKHAS] SDR + Front End Filter/Amp"
[07:00] <eroomde> morning all
[07:00] <jcoxon> hehe, these requests for filter/amp has gone crazyt
[07:00] <eroomde> yeah
[07:01] <eroomde> well, it does mean you have a basically working hab receiver for £40
[07:01] <jcoxon> i havent' even asked for 1
[07:01] <UpuWork> Well
[07:01] <UpuWork> I put you down in the original 5 :)
[07:02] <jcoxon> haha
[07:02] <jcoxon> really?
[07:02] <UpuWork> yeah
[07:02] <jcoxon> fair enough
[07:04] <eroomde> it's a nice thing
[07:04] <jcoxon> thanks UpuWork
[07:05] <jcoxon> on that note i have to go and collect a parcel
[07:05] <jcoxon> which i think is my rtl
[07:05] <eroomde> who is it from?
[07:06] <jcoxon> ebay
[07:06] <eroomde> i got a random 'you weren't in' note with 0 details filled in on it
[07:06] <eroomde> from interlink or something
[07:06] <jcoxon> i got a card and helen was actually in
[07:06] <jcoxon> so cheeky
[07:06] <eroomde> yeah, they seem a bit hopeless
[07:06] <eroomde> i need to courier some stuff today, that remind me
[07:06] <UpuWork> sometimes I don't even thing they bother knocking
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[07:08] <jcoxon> so i think we'll be launching this weekend
[07:09] <eroomde> no?
[07:09] <jcoxon> weather looks better
[07:09] <eroomde> oh i misread
[07:09] <eroomde> i meant to say
[07:09] <eroomde> COOL!!!!
[07:09] <eroomde> HEY GUYS!!!! WHERE DO I PUT THE HELIUM REGULATOR!!!!??!?!1 one
[07:09] <eroomde> not sure what came over me there, sorry
[07:10] <jcoxon> careful ed
[07:10] <jcoxon> don't get over excited!
[07:11] <eroomde> i'd end up plugging it in to the wrong end
[07:11] <eroomde> and who knows what'd happen
[07:12] <jcoxon> i'm confused
[07:12] <eroomde> nvm
[07:12] <eroomde> first coffee of the day, it takes me a while to calibrate
[07:13] <eroomde> so we have dick strawbridge, him of the amazingly powerful facial hair, coming on tues to do some tv thingamie about rockets
[07:14] <jcoxon> http://habhub.org/predict/#!/uuid=c6a7733f32d0d749f0ca14e7a3882bde28904930
[07:14] <jcoxon> eroomde, he did a good cooking program with his son
[07:14] <eroomde> given that Daniel Jubb (him of the hybrid for powering bloodhound) is also on this site ( http://www.bbc.co.uk/radio4/saturdaylive/media/danieljubb.jpg ) then i am quite keen to engineer it such that they meet
[07:14] <jcoxon> i think he won masterchief
[07:14] <UpuWork> Sunday cool
[07:14] <eroomde> see if they annihilate when they touch
[07:15] <jcoxon> UpuWork, thats if the valve doesn't work ;-)
[07:15] <eroomde> we do need to fix the predictor.....
[07:15] <jcoxon> yeah
[07:15] <eroomde> but wow that's a beautiful flight profile
[07:16] <jcoxon> if(flightpath == mandlebrot){
[07:16] <eroomde> like the olden days of long duration floaters from churchill
[07:16] <eroomde> where they'd wonder out to the north sea the dogleg back towards rob harrison
[07:16] <jcoxon> good old ballasthalo2
[07:16] <jcoxon> probably the most fun tracking flight i had
[07:17] <eroomde> the one that came back from the dead at dawn
[07:17] <jcoxon> yeah
[07:17] <eroomde> like an anti-vampire
[07:17] <jcoxon> well i now know what happened
[07:17] <eroomde> gps cooled off?
[07:17] <jcoxon> we thought it was a gps failure
[07:17] <eroomde> oh it wasn't?
[07:17] <eroomde> oh cool tell
[07:17] <jcoxon> no i think it was the atemega
[07:17] <jcoxon> so it got cold
[07:17] <jcoxon> and so the serial baud rate went off
[07:18] <jcoxon> so it couldn't get data from the GPS
[07:18] <eroomde> ah right
[07:18] <jcoxon> if the valve works : http://habhub.org/predict/#!/uuid=65d99eeec15a211f03759f6834dd673907ee07d8
[07:18] <eroomde> knew it was worth the extra £5 to use TCXOs on the badgers :p
[07:18] <jcoxon> :-)
[07:19] <jcoxon> lesson learnt
[07:19] <jcoxon> eurus2 should be fun
[07:19] <UpuWork> Will Xaben be transmitting or just doing the valve ?
[07:19] <eroomde> so basically the threshold is about 26km for it to float back towards us
[07:19] <jcoxon> i think i've fixed the issues we had with 1
[07:19] <eroomde> which is nice and low
[07:19] <jcoxon> UpuWork, yeah it'll be tx'ing
[07:19] <jcoxon> on .650
[07:19] <jcoxon> we'll need tracking of both
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[07:20] <jcoxon> actually eurus will be the 'backup' tracker
[07:20] <UpuWork> obviously I have more than a passing interested in the EURUS tracker :)
[07:20] <jcoxon> UpuWork, indeed
[07:20] <eroomde> you can't rely on the euru at the moment
[07:21] <jcoxon> personally think the antenna is the best i've made
[07:21] <eroomde> so best just keep it as a backup
[07:21] <UpuWork> got some pictures jcoxon ?
[07:21] <jcoxon> give me a sec
[07:21] <eroomde> there are a lot of financial metaphors to be had here actually
[07:21] Action: UpuWork pokes eroomde
[07:21] <eroomde> floating steadily, bursting and falling etc
[07:22] <eroomde> oh you're trying to have a serious tech chat?
[07:22] <eroomde> sorry
[07:22] <eroomde> why didn't you say?
[07:22] <UpuWork> I wonder if eroomde alterego is Solarday
[07:22] <UpuWork> eroomde inner troll
[07:23] <eroomde> right gtg
[07:23] <UpuWork> laters
[07:25] <UpuWork> I'm going to do a £25 tracking station solution using a 1/4 wave made from a wine cork, I'll refer people to the type of wine to purchase to get the cork to eroomde
[07:25] <UpuWork> may end up being more than £25 though
[07:25] <UpuWork> See if I can get it working for this weekend and test it
[07:26] <jcoxon> :-)
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[07:29] <earthshine> Morning
[07:29] <UpuWork> morning earthshine
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[07:30] <jcoxon> UpuWork, just uploading now
[07:31] <UpuWork> uploading what ?
[07:31] <jcoxon> pics
[07:31] <UpuWork> oh sorry yes
[07:31] <Darkside> or gtfo
[07:32] <UpuWork> I need a coffee
[07:32] <UpuWork> morning Darkside
[07:32] <Darkside> evening UpuWork
[07:33] <UpuWork> brb need a brew
[07:34] <fsphil> coffee is horrible stuff
[07:34] <fsphil> really nasty smell
[07:37] <Elwell> fsphil: keep persevering
[07:38] <jcoxon> UpuWork, http://www.flickr.com/photos/jcoxon77/sets/72157630204208604/with/7406477942/
[07:38] <Elwell> you eventually work up immunity
[07:39] <jcoxon> bbl
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[07:39] <Darkside> lol
[07:39] <fsphil> lol
[07:39] <Darkside> that antenna is going to disintegrate on landing
[07:39] <Darkside> and get torn apart when it goes through a tree
[07:39] <Elwell> jcoxon going for extreme ironing? 1st ironing board in space?
[07:39] <fsphil> it's going to land in the ocean, so not a problem :)
[07:40] <Darkside> ahh yes
[07:40] <Darkside> you UK HABbers and your disposable payloads
[07:40] <daveake> You Aussies and your large land mass
[07:40] <Darkside> :P
[07:40] <Darkside> hey, we have problems getting to our payloads too :P
[07:41] <fsphil> we need the ocean levels to drop a bit before we get simi9lar land mass
[07:41] <daveake> I mean, you guys must *never* land in the sea ......
[07:41] <fsphil> ooch
[07:41] <Darkside> daveake: hahahahahahaha
[07:41] <Darkside> we wish
[07:41] <Darkside> its happened 3 times now...
[07:41] <daveake> :)
[07:41] <Darkside> Horus 8, 16 and.. i think it was 22?
[07:41] <Darkside> yeah, 22
[07:41] <daveake> shame it wasn't 24
[07:41] <Darkside> landed 2km off the coast of the coorong national park..
[07:41] <Darkside> haha
[07:41] <daveake> then you'd know in advance
[07:41] <Darkside> we've got past 24 :P
[07:42] <Darkside> 24 was a cutdown test
[07:42] <Darkside> next one we have to worry about is 32
[07:42] <Darkside> woo rain
[07:45] <fsphil> what provides autoreconf in debian?
[07:45] <UpuWork> I like that antenna
[07:45] <UpuWork> looks nice
[07:48] <daveake> Never seen a paracetemol box used as a structural device before :)
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[07:58] <UpuWork> lol
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[08:15] <fsphil> ah, libtool provides autoreconf
[08:15] <fsphil> obviously
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[08:27] <KT5TK> Hi, has anyone ever looked into the SiLabs Si4010 or Si4012 chips?
[08:27] <KT5TK> http://www.silabs.com/products/wireless/EZRadio/Pages/Si4012.aspx
[08:27] <KT5TK> They're quite cheap and I'm thinking of building a 2m APRS tx (AFSK) with it.
[08:28] <KT5TK> Similar to Bigredbee with the ADF7012
[08:31] <Darkside> yeah
[08:31] <Darkside> the dodgy way :P
[08:31] <Darkside> well
[08:31] <Darkside> theres 2 ways of doing it, bigredbee is the dodgy way
[08:31] <Darkside> modulating the crystal is the better way
[08:32] <KT5TK> Hmm, the problem is that the Si chips don't really use the xtal continuously.
[08:32] <Darkside> KT5TK: probably easier and cheaper in terms of development cost, to get a HX1 module or something
[08:32] <Darkside> or TX1H
[08:33] <Darkside> its not like you'll get ay more TX power out of the Si chips
[08:33] <KT5TK> I know, but I'd like to be freq agile
[08:33] <Darkside> ahh yes
[08:33] <Darkside> mm
[08:33] <Darkside> i'd go with finding one that you can modulate teh crystal with
[08:33] <Darkside> the bigredbee transmits 01010101 and changes the baud rate iirc
[08:34] <fsphil> really?
[08:34] <KT5TK> I have Arduino code that can switch freqs depending on GPS location
[08:34] <Darkside> some guy was in here a while back, he mentioned that method
[08:34] <fsphil> that's seems a fairly unique solution
[08:34] <Darkside> yeah
[08:34] <Darkside> and not one i'd want to use
[08:34] <Darkside> sounds horribly unclean
[08:34] <fsphil> yea
[08:35] <KT5TK> Yes, I thought abt this way (010101). Is the bigredbee signal really that dirty?
[08:35] <fsphil> pwm isn't great either but seems more logical
[08:35] <Darkside> KT5TK: i dunno
[08:35] <KT5TK> Any measurements done?
[08:35] <Darkside> tharts th ething
[08:35] <Darkside> i haven't found any
[08:35] <fsphil> there's likely filtering
[08:35] <Darkside> and i'm not paying for a bigredbee to find out
[08:35] <Darkside> fsphil: where though?
[08:35] <Darkside> you can't filter the pseudo-fm signal it transmits
[08:36] <fsphil> oh
[08:36] <Darkside> the filtering woudl have to be done inside the chip somewhere
[08:36] <fsphil> it's a digital interface?
[08:36] <Darkside> yes
[08:36] <fsphil> gotcha
[08:36] <KT5TK> I see. Would a 4 step quasi-FM with a ADF7022 be better?
[08:36] <Darkside> dunno
[08:36] <Darkside> there are frequency agile radiometrix modules
[08:36] <Darkside> but they cost about $100
[08:37] <KT5TK> Si4012 costs aless than $3
[08:37] <Darkside> add surrounding components and dev cost
[08:37] <KT5TK> not much really.
[08:37] <Darkside> and the time spent getting it working and then the amp to get the output power up
[08:38] <Darkside> bbl, DayZ
[08:38] <KT5TK> well develop once and let many use the design
[08:39] <KT5TK> Main issue is the software I guess.
[08:39] <Darkside> you have to continually send 010101
[08:40] <KT5TK> Hm, I believe the preamble could be configured that way.
[08:40] <KT5TK> There is some example code that produces a "tone"
[08:41] <KT5TK> However it is designed for OOk
[08:41] <KT5TK> The chip can do FSK though
[08:42] <Darkside> FSK != AFSK
[08:43] <KT5TK> http://www.silabs.com/Support%20Documents/Software/Si4010_example_programs.zip (tone_demo)
[08:43] <KT5TK> FSK != AFSK I know, but that's why I want 1010101
[08:44] <KT5TK> The tone example does this actually somehow.
[08:46] <KT5TK> They repeat the preamble and one byte continuously, if I understand the example code correctly.
[08:47] <KT5TK> Anyone knows what FSK shift should be used to emulate AFSK?
[08:49] <Darkside> wahtever the deviation
[08:49] <KT5TK> 3kHZ?
[08:50] <KT5TK> probably less, so that you don't reach the limits of the receiver?
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[08:58] <KT5TK> If a NMEA to APRS converter would fit on the 8051 core of a Si4010 then this would be really a minimalist tracker...
[08:59] <Laurenceb_> iirc CUSF did just that
[08:59] <KT5TK> How exactly?
[09:00] <Laurenceb_> they used a chipcon receiver
[09:00] <Laurenceb_> *trasnceiver
[09:01] <KT5TK> From TI?
[09:02] <Laurenceb_> yes
[09:05] <KT5TK> What frequency / chip? Any links to the project?
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[09:33] <eroomde> KT5TK: yo
[09:33] <eroomde> cusf person here
[09:33] <eroomde> yes, we did something like that
[09:34] <eroomde> http://www.flickr.com/photos/cuspaceflight/3887350096/in/set-72157621846323425
[09:34] <eroomde> the things on the right
[09:35] <eroomde> gps -> cc1100
[09:35] <eroomde> using the 8051 core
[09:35] <eroomde> also had some channels to fire pyrotechnics and some other bells and whistles for our specific app
[09:35] <eroomde> about the size of a stick of gum
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[09:40] <KT5TK> They look really cool!
[09:40] <KT5TK> What are you transmiting? 144 MHz AFSK?
[09:46] <KT5TK> Datasheet of the cc1100 says it's for the 470/950 MHz ISM/SRD bands. Can they be tweaked for 70cm amateur freq or even 2m?
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[10:00] <benoxley> morning
[10:00] <benoxley> is anyone on here running u-center under wine?
[10:01] <KT5TK> I believe I had that working. Let me check
[10:01] <benoxley> okay
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[10:02] <KT5TK> Yes, at least it starts up under wine/ Ubuntu
[10:03] <benoxley> I can start it up
[10:03] <KT5TK> but?
[10:03] <benoxley> but it doesn't recognise any usb devices
[10:03] <benoxley> trying to work out how to pass the device to wine
[10:03] <KT5TK> Yea, do you need USB urgently?
[10:04] <KT5TK> Or could you use your own USB to serial dongle
[10:04] <KT5TK> ?
[10:04] <benoxley> well, not usb exactly
[10:04] <benoxley> its a usb->serial modem
[10:05] <benoxley> shows up in /dev as tty.usbmodem411
[10:05] <KT5TK> ok. If you can use a virtual com port it should work
[10:05] <KT5TK> You need to make a symlink to com1 or similar
[10:06] <benoxley> thanks, will give it a shot :)
[10:08] <KT5TK> goto ~/.wine/dosdevices/ and ln -s your /dev as tty.usbmodem411 to com1 or any free com port of your choice.
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[10:10] <KT5TK> make sure that you have r+w permissions to /dev/tty.usbmodem411
[10:10] <benoxley> should it be possible to use it as a runtime arguement in winebottler?
[10:10] <KT5TK> possible, but I don't know how exactly.
[10:11] <KT5TK> Do the linking on the Linux side . That sounds safer.
[10:11] <benoxley> will have a play
[10:12] <benoxley> just in case it makes a difference, i'm on os x, not linux
[10:13] <KT5TK> OK, no OSX experience here, but the symlink variant should work anyhow. Maybe the /dev directory is somewhere else.
[10:15] <KT5TK> wine expects some virtual file (or symlink) named comX (where X is a number) in the dosdevices directory.
[10:25] <benoxley> okay
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[10:48] <eroomde> KT5TK: sorry i had to do some dayjob :)
[10:48] <eroomde> yes it's transmitting rtty on 70cm amateur band
[10:48] <eroomde> you can wiggle the centre frequency about fast enough to do RTTY with a reasonable shift (about 300Hz iirc)
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[11:05] <gonzo_> advice.... Application for NOTAM. Email it or best to post?
[11:05] <daveake> email is fine
[11:06] <gonzo_> ta, was worried iot may just end up in limbo
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[11:19] <griffonbot> Received email: Neil Baker "[UKHAS] Launch location checks before applying for a NOTAM"
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[12:04] <eroomde> sdr dongle has arrived
[12:04] <eroomde> whoop
[12:04] <Darkside> whoo
[12:04] <eroomde> sadly out this eve so i can't play
[12:05] <Darkside> now to get all the software going
[12:05] <Darkside> yaay
[12:05] <Darkside> eroomde: gnuradio can be compiled on mac
[12:05] <Darkside> just have to satisfy all the dependencies
[12:05] <Darkside> which is a bitch
[12:05] <Darkside> i'm sure you'll work it out
[12:05] <eroomde> i use ubuntu on my pc
[12:05] <eroomde> will stick with that for now
[12:05] <Darkside> yeah use the build_gnuradio script
[12:05] <Darkside> the version on the ubuntu repos is ancient
[12:06] <UpuWork> if you can force yourself to make it easy and boot into windows SDR# is fantastic
[12:07] <eroomde> no
[12:07] <eroomde> false
[12:07] <eroomde> .
[12:07] <Darkside> i'd like to see a little app that does SSB demodulation
[12:07] Action: eroomde sticks fingers in ears
[12:07] <Upu> lol
[12:07] <Darkside> and appears as a sound device or something
[12:07] <Upu> doesn't even need installing
[12:07] <Darkside> so fldigi can talk to it
[12:07] <eroomde> i'm definitley in it to hack
[12:07] <Darkside> eroomde: woo
[12:08] <Upu> which dongle did you get in the end ?
[12:08] <daveake> Don't worry Upu, I followed your excellent write-up and got it working with losing any hair :)
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[12:09] <Upu> I'm waiting for someone to add the "Linux Installation" instructions
[12:09] <BrainDamage> Upu: but sdr# doesn't allow you to chain together blocks to diy your signal processing chain
[12:09] <BrainDamage> which is a super awesome + of gnuradio
[12:10] <BrainDamage> they have 2 diff pourposes
[12:10] <Darkside> on linux you'd use gqrx
[12:10] <BrainDamage> Upu: if you ask in ##rtlsdr they'll tell you
[12:11] <Darkside> don't
[12:11] <Darkside> :P
[12:11] <BrainDamage> afaik you have to symlink some .so
[12:11] <Darkside> lots of noobs
[12:11] <fsphil> I'd like to hack something onto gqrx so that it presents a port, though which it can open it's own demodulator
[12:11] <fsphil> and fldigi can connect to that to get audio
[12:11] <fsphil> or multiple fldigis
[12:11] <Darkside> yup
[12:11] <Darkside> that'd be cool
[12:11] <fsphil> and send tuning commands back to it
[12:11] <BrainDamage> and there's the weird guy that insists he could tune in the pll not locked band
[12:11] <fsphil> so each demodulator can be adjusted independently
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[12:12] <BrainDamage> but he formatted his pc, and he lost the dll ...
[12:12] <fsphil> hah
[12:13] <Darkside> * [FIXED]Audibility is far to high (completely rebalanced, in line with how it was in previous updates)
[12:13] <Darkside> wait
[12:13] <BrainDamage> and they are trying to hide the functionality ...
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[12:33] <daveake> Blimey. Farnell have gotten round to sending out my pi
[12:33] <daveake> RS managed theirs weeks ago
[12:34] <Darkside> haha
[12:36] <fsphil> I just registered my interested on both yesterday. be interesting to see how slow it is now
[12:39] <eroomde> only gout ours this week when we ordered them the day after they were released
[12:43] <fsphil> I ordered that morning,about 5 hours after launch I think
[12:44] <fsphil> arrived about 4 weeks ago
[12:44] <fsphil> I probably won't see another one for months
[12:44] <fsphil> habhound works quite well on it
[12:45] <nick_> I ordered 1 minute after release.
[12:45] <fsphil> how long till it arrived?
[12:45] <nick_> That meant I missed out on the initial batch of 2000 by no many (if my order number is to be trusted)
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[12:45] <nick_> I forget when I got it.
[12:46] <nick_> Maybe a month ago?
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[12:47] <daveake> Hmm Got my RS one around 10th May
[12:48] <Darkside> hmm
[12:48] <Darkside> i need about 3 of them
[12:48] <Darkside> :P
[12:48] <Darkside> i don't like my chances
[12:48] <Darkside> might have to get beagleboards insteas
[12:48] <daveake> HABtastic post today ... even included a pre-amp I ordered months ago
[12:48] <Darkside> good thing its not be paying for it
[12:48] <fsphil> mmm preamp
[12:48] <fsphil> what kind daveake ?
[12:48] <daveake> Was going to cancel that and wait for one of Darkside's :)
[12:49] <daveake> Vectronics
[12:49] <Darkside> heh
[12:49] <fsphil> aah the little kit?
[12:49] <Darkside> Upu is my UK distributor
[12:49] <Darkside> lol
[12:49] <daveake> I suspect yours will be rather better
[12:49] <Darkside> AUTHORIZED RESELLER
[12:49] <daveake> I know, UpuUK has my order :)
[12:49] <fsphil> AUTHORISED :p
[12:49] <Darkside> haha
[12:49] <Darkside> yes
[12:49] <Darkside> that
[12:50] <fsphil> lets hope they work
[12:50] <Darkside> well the response looks good
[12:51] <fsphil> it's spot on
[12:52] <UpuWork> i iz authorized!
[12:53] <fsphil> all we need now is to intergrate the whole lot onto a single USB stick
[12:54] <UpuWork> Reverse engineering time
[12:54] <fsphil> after finding another tuner
[12:54] <UpuWork> Yeah I don't get Elonics
[12:54] <UpuWork> they have gone bust but the web site is still up
[12:55] <fsphil> bit sus
[12:55] <fsphil> unless the host hasn't been informed
[12:55] <UpuWork> http://www.finditinscotland.co.uk/business-finance-legal-services/public-notices/public-notice/elonics-limited-in-liquidation-compan-6573501.html
[12:57] <fsphil> same elonics?
[12:57] <UpuWork> http://www.elonics.com/uploads/assets/E4000_RF_DVBT_DABDAB_and_FM_USB_Dongle_Reference_Design.pdf
[12:57] <UpuWork> yup
[12:58] <UpuWork> SC256532 : ELONICS LIMITED
[12:58] <UpuWork> Credit Limit (£) : 0 Risk : Credit Rating is Suspended - Exercise extreme caution
[12:58] <UpuWork> Exercise extreme caution in dealing with this company.
[12:58] <UpuWork> This Company is in Liquidation.
[12:58] <UpuWork> interesting
[12:59] <UpuWork> their reference design comes with schematics and gerbers
[12:59] <fsphil> no doubt there
[12:59] <Darkside> hehe
[12:59] <Darkside> not going to be able to make that anymore
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[13:00] <Darkside> AUSSIE AUSSIE AUSSIE
[13:00] <fsphil> ban him!
[13:00] <Darkside> wat
[13:00] <Darkside> that's not the correct response
[13:00] <fsphil> no wait, welcome him!
[13:00] <UpuWork> #ukhas welcomes all our colonies
[13:00] <fsphil> hiya markdownunder :)
[13:00] <fsphil> are you call called mark down there?
[13:00] <UpuWork> Bleeding Kylie is almost a member of the royal family
[13:00] <fsphil> are you all*
[13:00] <markdownunder> no just me and Darkside :-)
[13:00] <Darkside> haha
[13:00] <UpuWork> thats his surname Mr Downunder to you
[13:01] <markdownunder> i'm English btw
[13:01] <markdownunder> soon i will me markinengland again
[13:01] <markdownunder> less catchy
[13:01] <Darkside> i will be markinengland soon too!
[13:02] <Darkside> should totally change my nick to that while i'm there
[13:02] <fsphil> hah
[13:02] <UpuWork> would get confusing
[13:02] <fsphil> maybe I can do ozphil
[13:03] <markdownunder> is anyone else from WA on here ?
[13:03] <markdownunder> at any point
[13:04] <fsphil> ordered some camping equipment, expect it to rain for at least a week
[13:04] <Darkside> don't think so
[13:05] <gonzo_> confise it and buy a camp showe
[13:05] <gonzo_> r
[13:07] <markdownunder> planning a launch soon over here on the westside. but nobody to track !
[13:07] <UpuWork> which territory ?
[13:08] <markdownunder> so will use APRS
[13:08] <markdownunder> WA
[13:08] <UpuWork> ah ok
[13:08] <Darkside> markdownunder: how extensive is your network?
[13:08] <Darkside> i mean, the aprs network over there
[13:08] <markdownunder> nothing is very extensive over here
[13:08] <Darkside> doesn't look like theres much outside of perth
[13:08] <markdownunder> but the 10w transmitter will probably reach a fair way
[13:08] <Darkside> oh jeez
[13:08] <Darkside> 10W?
[13:08] <Darkside> are you insane?
[13:09] <Darkside> !!
[13:09] <Darkside> 300mW is MORE than enough!
[13:09] <Darkside> all 10W will get you is maybe one more packet before landing
[13:09] <markdownunder> yeah i know
[13:09] <daveake> Nah, use 10W and a valve transmitter.
[13:09] <Darkside> and by that point you should be near enough to hear the backet directly anyway
[13:10] <eroomde> just have a small nuke suspended below and blow it up just before you land
[13:10] <eroomde> then drive towards the mushroom cloud
[13:10] <daveake> Good idea
[13:10] <eroomde> i don't see why you're overcomplicated this with radios and electronics and stuff
[13:10] <markdownunder> nobody would notice
[13:10] <markdownunder> in fact i think they tested nukes here
[13:10] <daveake> Might improve the country
[13:11] <Darkside> they did test nukes here
[13:11] <Darkside> emu field, maralinga, and thatplace in north WA
[13:11] <markdownunder> in WA ?
[13:11] <Darkside> yeah
[13:11] <markdownunder> bingo
[13:11] <Darkside> montebello islands?
[13:12] <markdownunder> i'll just launch there then
[13:12] <Darkside> heh
[13:12] <Darkside> aaaanyway
[13:12] <Darkside> 10W is overkill
[13:12] <Darkside> massive, massive overkill
[13:13] <UpuWork> we can track from the UK @ 10w
[13:13] <Darkside> 300mW will do just fine
[13:13] <Darkside> 10W will just mean you need to fly more batteries, which means less weight for other stuff
[13:13] <Darkside> markdownunder: http://rfhead.net/wp-content/uploads/2012/05/aprs_payloads.jpg
[13:13] <Darkside> thats what our aprs payloads look like
[13:14] <Darkside> hacked up micronut boards, with Radiometrix HX1 modules on the back
[13:14] <markdownunder> i have on of the bionics jobs. advertises 10w but can be throttled down
[13:14] <Darkside> running off 2xAA batteries, they last 24 hours
[13:14] <Darkside> markdownunder: bypass the motorola amp block on them
[13:14] <markdownunder> *byonics
[13:14] <Darkside> they probably have a HX1 module with an amp after it
[13:15] <Darkside> oh its not a HX1
[13:15] <Darkside> its the frequency agile one
[13:15] <Darkside> hrmm
[13:16] <Darkside> markdownunder: whats your call?
[13:16] <markdownunder> vk6mwd
[13:16] <Darkside> aha
[13:16] <Darkside> vk5qi here
[13:16] <markdownunder> soon to be vk6py
[13:16] <Darkside> niiiice :D
[13:16] <Darkside> grats on the full cal
[13:16] <Darkside> call*
[13:17] <markdownunder> well i guess today. wia sent me post this morning
[13:17] <eroomde> 6 > 5?
[13:17] <Darkside> eroomde: ?
[13:17] <markdownunder> 6 = wa
[13:17] <eroomde> wa?
[13:17] <Darkside> 5 = SA
[13:17] <Darkside> western australia
[13:17] <eroomde> ah
[13:17] <Darkside> far far away from me
[13:17] <eroomde> everywhere is far away from everywhere down there
[13:18] <Darkside> WA could secede from australia and we probably wouldn't notice, if it wasn't for he sudden drop in income from mining taxes
[13:18] <markdownunder> hence 10w
[13:18] <Darkside> naw
[13:18] <Darkside> when its in the air you'll have LOS
[13:18] <Darkside> and 300mW will be fine
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[13:18] <Darkside> your problem is going to be the path
[13:18] <Darkside> depending on where it goes, you may have to hop across 2 digipeaters to get into a igate
[13:18] <Darkside> and flying a payload running WIDE2-2 is a baaaaaaad idea
[13:19] <Darkside> we did that once.
[13:19] <markdownunder> there are no other trackers, so question is, will it reach perth
[13:19] <Darkside> utterly congested the network
[13:19] <Darkside> run a mobile igate
[13:19] <markdownunder> no cell coverage
[13:19] <Darkside> you're going to want in-car mapping anyway
[13:19] <Darkside> then run mobile APRS stuff anyway
[13:20] <Darkside> UIView32 or whatever
[13:20] <Darkside> you'll want some kind of in-car tracking no matter what
[13:20] <markdownunder> yep got that covered
[13:20] <Darkside> we use APRS-capable handhelds
[13:20] <Darkside> but you don't need that
[13:21] <Darkside> also you realise the byonics gps will crap out at 18km
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[13:21] <markdownunder> what range do you estimate you got with 300mw ?
[13:21] <Darkside> or did you get the other overpriced gps
[13:21] <Darkside> markdownunder: we got into the nearest digi, somethign like 200km away
[13:21] <markdownunder> ok well my launch site is 200km into nowhere
[13:22] <markdownunder> no got the HA GPS
[13:22] <markdownunder> should keep working, we will see.
[13:22] <Darkside> http://aprs.fi/#!mt=roadmap&z=11&call=a%2FVK5ARG-12&timerange=3600
[13:22] <Darkside> got into mildura at 900m altitude
[13:22] <Darkside> from 107km away
[13:23] <Darkside> if you can, fly another tracker too
[13:23] <Darkside> always good to have a backup
[13:23] <Darkside> and who cares if noone else tracks
[13:23] <Darkside> if you are tracking in the car, thats all that matters
[13:23] <markdownunder> going to use a Spot thingy
[13:23] <Darkside> yeah thats a good backup
[13:23] <Darkside> just means you need to be in phone range to find out where it lands
[13:24] <Darkside> or have someone in perth checking, and comm with them via HF
[13:24] <Darkside> (which might be a good idea actually)
[13:24] <markdownunder> yeah true. there is cell coverage on the major roads (both of them) so will have to swerve back towards civilisation to check it
[13:24] <Darkside> get them to give you the landing position from the SPOT over HF
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[13:25] <Darkside> this assumes you have HF in your car, which you may not
[13:25] <markdownunder> yep. might well do that so the SMS get thru. not going to lug an HF with me tho
[13:25] <Darkside> its bloody useful to have, i must admit
[13:25] <markdownunder> i shall use the telephone.
[13:25] <Darkside> heh, we have HF in most of our chase vehicles
[13:25] <Darkside> the one that doesn't usually carries a codan manpack
[13:26] <Darkside> annoying to use, have to stop and set it up on the roof of the car to use it
[13:28] <markdownunder> planning to go sometime in July. shocking weather at the moment so who knows...
[13:28] <Darkside> http://imgur.com/Iaouj,VSYzZ#0
[13:28] <Darkside> ok
[13:28] <Darkside> thats how we did HF comms wt the landing site for one of the balloons :P
[13:28] <Darkside> had to inform the other group that we'd got it back
[13:29] <Darkside> that launch was pretty much like what you're going to be doing
[13:29] <Darkside> way outside of phone range
[13:29] <Darkside> everything had to work offline
[13:29] <Darkside> but all of our tracking stuff doesn't require net access
[13:30] <Darkside> you shoudl see us in the next issue of AR :D
[13:33] <gonzo_> I suggested a while ago, a com port in/out for fl-digi
[13:34] <gonzo_> so you can get the framed telem strings out and send them on to another system (soem hf datamode)
[13:34] <Darkside> gonzo_: it has ARQ
[13:34] <Darkside> which is TCP based
[13:34] <gonzo_> then poke strings in at the far end, to go off to the rest of the world
[13:34] <Darkside> we use that to read in strings already
[13:35] <Darkside> a little bit of python or java glue would to that nicely
[13:35] <gonzo_> fldigi or the codan?
[13:35] <Darkside> fldigi
[13:35] <Darkside> i mean
[13:35] <Darkside> we use fldigi's ARQ server to read the strings into our own mapping software
[13:35] <Darkside> the ARQ server can also be used to transmit
[13:36] <gonzo_> so two instances of fldigi?
[13:36] <Darkside> so it would be entirely possible to have 2 instances of fldigi running, one on another ARQ server port, and do what you mentioned
[13:36] <Darkside> rebroadcast onto HF somewhere
[13:36] <Darkside> wouldn't be too hard to hack that up in our trucks actually
[13:37] <Darkside> just rebroadcastt every 4th sentance at a lower baud rate, or something like that
[13:37] <gonzo_> yep, that's sort of what I was thinking, though I'm 15yrs out of date tech wise, so was thinking of hw solution
[13:37] <Darkside> well if you have a computer already decoding the data, may as well use it to retransmit
[13:38] <Darkside> i'd just hook a signalink USB up to one of the HF radios in the truck
[13:38] <Darkside> but tbh we're more concerned about us receiving the data than everyone else getting it
[13:39] <Darkside> if we get the data in our chase cars, thats good enough. it means we can recover the payload, and thats the #1 peiority
[13:39] <Darkside> priority*
[13:39] <Darkside> it appearing on spacenear.us is lower down the chain
[13:39] <Darkside> for the mildura launch, there was no data on spacenear.us below 2km altitude.
[13:39] <gonzo_> fun though
[13:40] <fsphil> I do enjoy tracking
[13:40] <Darkside> then there was about a 2 hour period after landing before we got back into phone range and could inform people we'd recovered the payload
[13:40] <fsphil> chasing is more fun though
[13:40] <Darkside> chasing is so much fun :-)
[13:40] <Darkside> for our normal launches we get people in adelaide tracking it down to a few hundred metres
[13:40] <Darkside> so thats good
[13:40] <Darkside> the mildura launch was a bit of an exception
[13:41] <Darkside> anyway
[13:41] <Darkside> if i was going to do it, i'd be inclined to get a packet, re-encode it as an APRS packet, and send it out on the HF APRS frequenxy
[13:42] <fsphil> yea
[13:42] <Darkside> that way it gets gated into the net automatically
[13:42] <Darkside> well, ideally
[13:42] <Darkside> depends on receivers and conditions still
[13:42] <Darkside> but its more likely someone will be listening there
[13:42] <fsphil> there are many excellent HF receivers there
[13:42] <fsphil> lots of open space for big antennas
[13:42] <Darkside> the problem with all this is it means we lose HF comms in the chase car thats doing this
[13:43] <fsphil> use aprs for the comms?
[13:43] <Darkside> nah, we use voice
[13:43] <Darkside> we use 80 or 160m for closerange stuff
[13:43] <Darkside> actually have used 40m before too, but that was just groundwave
[13:43] <Darkside> and that only worked because we had S0 noise
[13:44] <Darkside> man, i need to get ready for bed
[13:44] <Darkside> 2314 here
[13:46] <fsphil> eek
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[13:48] <gonzo_> gn
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[14:04] <griffonbot> Received email: Ed Moore "Re: [UKHAS] Launch location checks before applying for a NOTAM"
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[14:10] <benoxley> I'm disliking the ntx2 right now, 1baud the shift is fine, 300 baud creates a ton of harmonics
[14:10] <Darkside> that it does
[14:10] <Darkside> we still fly with it anyway
[14:10] <Darkside> and it works fine
[14:11] <benoxley> can't decode it though....
[14:12] <Darkside> weird
[14:12] <Darkside> we always fly 300 baud >_>
[14:12] <Darkside> how are you driving the NTX2?
[14:12] <benoxley> might be faulty design on my part
[14:12] <benoxley> but voltage at the tx pin seems fine
[14:12] <benoxley> ~0.2v range
[14:12] <Darkside> are you driving with one pin or 2
[14:13] <benoxley> one
[14:13] <Darkside> that may be the problem
[14:13] <Darkside> it might need the extra drive from 2 pins
[14:13] <benoxley> how come?
[14:13] <Darkside> wher you set one pin high, and one pin low
[14:13] <Darkside> and then flip the states on the pins to change to the other bit
[14:13] <Darkside> its how we drive the TXD pin anyway
[14:14] <benoxley> hmmm
[14:14] <benoxley> I don't see why that should cause an issue...
[14:14] <Darkside> input capacitance
[14:14] <fsphil> I do 300 baud from one pin
[14:14] <fsphil> infact I did 2400 buad
[14:14] <fsphil> baud*
[14:14] <Darkside> hrm
[14:14] <Darkside> well i dunno then
[14:14] <Darkside> it could also be the bias point
[14:15] <Darkside> i think ours is about 1.5v?
[14:15] <fsphil> yea I biased it a little high I think
[14:15] <fsphil> more like 2v or 2.5v here
[14:18] <benoxley> low is 1.5v
[14:18] <benoxley> high is 1.78v
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[14:21] <fsphil> how are you timing it?
[14:22] <benoxley> in code?
[14:22] <fsphil> yea
[14:22] <benoxley> tried both delayMicroseconds(3333) and delay(3)
[14:24] <fsphil> any interrupts running in the background?
[14:24] <benoxley> nope
[14:24] <benoxley> at the moment ive written a simple program to only test the radio
[14:24] <benoxley> well, I adapted blink for my purposes
[14:25] <benoxley> http://pastie.org/4120658
[14:25] <benoxley> 50 baud is *better*
[14:25] <benoxley> but still with sidebands
[14:25] <benoxley> http://imgur.com/54ToG <-- 50 baud
[14:27] <Darkside> lemme check how we did the timing
[14:27] <Darkside> case 300: delayMicroseconds(3400);
[14:27] <Darkside> interesting
[14:27] <Darkside> it works
[14:31] <benoxley> it decodes, but not very happy with it...
[14:33] <fsphil> you might have a power problem
[14:33] <benoxley> ?
[14:33] <fsphil> voltage might not be steady at the avr or ntx2
[14:34] <benoxley> will scope it
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[14:37] <benoxley> noise seems to be around 20mV and voltage is a very stable 3.3v
[14:41] <nick_> I'm looking to buy some sensors.
[14:41] <nick_> Does anyone have any suggestions for accelerometers and thermometers?
[14:41] <nick_> (where suggestion can include "don't use x")
[14:42] <benoxley> DS18B20 is very widely used as its very easy to link up
[14:42] <benoxley> as a temperature sensor
[14:42] <benoxley> but not amazingly accurate
[14:42] <benoxley> say ±2 degrees
[14:43] <benoxley> can't remember from the datasheet
[14:43] <benoxley> im using some tmp275aid sensors at the moment
[14:44] <benoxley> which are ±0.5 degrees
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[14:47] <nick_> I'm not really liking hte idea of this 1 wire bus thing.
[14:51] <fsphil> 1-wire ain't too bad
[14:51] <fsphil> there's plenty of libraries out there for it
[14:51] <fsphil> and it's actually pretty easy to do yourself if you like that sort of thing
[14:51] <nick_> I'm working on what I hope will be a fairly plug and play system.
[14:52] <fsphil> 1-wire has a system for scanning the bus
[14:52] <nick_> I might go with an analog output
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[15:09] <nick_> How does one solder a chip with all the pins on the bottom?
[15:09] <nick_> It needs an oven?
[15:10] <benoxley> which chip?
[15:11] <nick_> http://uk.rs-online.com/web/p/accelerometer/7167065/ for example
[15:13] <fsphil> you'd be surprised what you can solder with an iron and a steady hand
[15:13] <fsphil> but not that :)
[15:13] <fsphil> that looks very oveny
[15:14] <nick_> Does that hand have to be attached to someone's arm still, or I can keep it in a box under my desk?
[15:14] <fsphil> optional
[15:15] <BrainDamage> nick_: hot air tool alternatively
[15:20] <eroomde> nick_: i'd use an oven
[15:20] <eroomde> i can show you our toaster oven that we use a work
[15:20] <eroomde> it is just a £20 oven with a separate temp controller to provide some negative feedback
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[15:21] <nick_> We might have an oven here.
[15:22] <nick_> Are there some good accelerometers that are easier to solder?
[15:25] <Laurenceb> freescale make the best atm
[15:25] <Laurenceb> but there arent any easy to solder ones
[15:25] <eroomde> AD have some really nice ones too
[15:25] <eroomde> but they're much pricier
[15:25] <Laurenceb> ive hand soldered lga
[15:26] <Laurenceb> yeah
[15:26] <eroomde> more for instrumentation
[15:26] <Laurenceb> best==best cheap
[15:26] <Laurenceb> when i said freescale
[15:26] <eroomde> most of them seem to be leadless
[15:26] <eroomde> not sure why really
[15:26] <Laurenceb> phones i guess
[15:26] <Laurenceb> they usually use FR4 carrier board
[15:26] <Laurenceb> as they use glod bonded sens and frontend dies
[15:27] <Laurenceb> *gold
[15:27] <eroomde> that makes perfect sense now thanks
[15:27] <Laurenceb> invensense have wafer level interconnects, which is presumably they they are QFN
[15:27] <UpuWork> you could solder that acceleromter by hand as long as the pads on the pcb stuck out al ittle
[15:27] <nick_> This would be easier?
[15:27] <nick_> http://uk.rs-online.com/web/p/accelerometer/7090145/
[15:28] <nick_> UpuWork: ah, I hadn't thought about that.
[15:28] <eroomde> it can be tough to align those packages though
[15:28] <eroomde> when doing pins individually
[15:28] <UpuWork> just make a part so the pads stick out about the width of your soldering iron, then use paste and just heat the pad
[15:28] <UpuWork> works fine for BMP085's
[15:28] <eroomde> the surface tension of the one hot and molten pad can drag the chip across by say 0.3mm
[15:29] <UpuWork> *width of your soldering iron tip
[15:29] <UpuWork> and what eroomde said
[15:29] <eroomde> yeah paste negates the problem as that provides a bit of friction
[15:29] <eroomde> but if you have paste and presumably therefore a stencil, just oven the thing :)
[15:29] <eroomde> stencils cost more than ovens
[15:31] <fsphil> good stencils anyway
[15:31] <eroomde> indeed
[15:32] <eroomde> i would recommend a decent stainless steel stencil though. they can just be a bit too elastic around regions with lots of cutouts (such as runs of pads on an ic) and so you don't get a particularly accurate paste application as you drag the wee trowel of paste across
[15:32] <eroomde> sorry vague, the plastic stencils can be a bit too elastic etc
[15:33] <eroomde> whereas the stainless ones hold their shape better
[15:40] <Laurenceb> ive never had issues
[15:40] <Laurenceb> i use window scrapers and scotch guard 90 tho
[15:42] <nick_> I wonder whether I really want the accelerometer...
[15:43] <nick_> UpuWork: which ublox model do you use?
[15:43] <UpuWork> Max-6
[15:43] <UpuWork> small but still large enough to solder
[15:44] <fsphil> keep that hand in the fridge before doing it though
[15:44] <jonsowman> shut up zeusbot
[15:44] Action: UpuWork pats zeusbot
[15:44] <nick_> fsphil: I thought I'd use dry ice.
[15:44] <fsphil> better
[15:44] <UpuWork> for soldering ?
[15:44] <nick_> It may not be better, but it looks cool.
[15:44] <fsphil> UpuWork: it's nick_'s steady hand
[15:44] <UpuWork> oh :)
[15:44] <nick_> UpuWork: where do you get them from?
[15:45] <fsphil> are you able to get those really tiny ones in small quantities UpuWork?
[15:45] <UpuWork> A little tub on a desk over here
[15:45] <UpuWork> http://ava.upuaut.net/store/index.php?route=product/category&path=59_64
[15:45] <UpuWork> They'll sell me 20 for evaluation but then its 2000 at a time
[15:45] <UpuWork> and they look nasty to solder, BGA
[15:45] <UpuWork> MAX6 is fine
[15:46] <fsphil> stencil should handle it
[15:46] <UpuWork> I buy them in bulk from Alphamicro in the UK nick_
[15:46] <fsphil> 2k is too many though
[15:46] <fsphil> 2 maybe
[15:46] <UpuWork> you can get 10% off that price too
[15:47] <fsphil> nice of them
[15:48] <fsphil> not sure you could solder 2k of them and still remain sane
[15:48] <fsphil> although if it was 20 per stencil, maybe
[15:48] <fsphil> just cut the boards apart after soldering
[15:49] <nick_> UpuWork: this is your store?
[15:49] <UpuWork> it is yes
[15:49] <daveake> By appointment to the Queen
[15:49] <daveake> 's colonies
[15:51] <Laurenceb> there is an online store
[15:51] <Laurenceb> for ublox
[15:51] <Laurenceb> but 75euro for a max6
[15:51] <UpuWork> I know
[15:51] <UpuWork> use them if you want but I think my £15 is a little cheaper
[15:51] <Laurenceb> heh
[15:51] <nick_> UpuWork: which antenna do you suggest?
[15:52] <UpuWork> Sarantel unless your going pico in which case the chip antenna
[15:52] <UpuWork> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[15:52] <UpuWork> can ust buy a premade one if you want
[15:52] <UpuWork> What µController are you using ?
[15:52] <nick_> Actually, it looks like just planning on using the breakout might be best.
[15:52] <nick_> mbed
[15:52] <UpuWork> 3.3v ?
[15:52] <UpuWork> or 5 ?
[15:52] <nick_> yeah
[15:52] <UpuWork> breakout is fine then
[15:53] <nick_> Really it's a NXP cortex m3
[15:53] <UpuWork> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=52
[15:53] <UpuWork> thats the chip version
[15:53] <UpuWork> but unless your really bothered about weight (+6g!) get the Sarantel version
[15:54] <nick_> What are the breakout pins?
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[15:55] <UpuWork> VCC, GND, RX, TX, SCL, SDA, TIMEPULSE and VBCK
[15:55] <nick_> RX, TX SCL, SDA is SPI?
[15:55] <jonsowman> SCL/SDA is I2C
[15:56] <jonsowman> RX/TX is async serial
[15:56] <nick_> OK
[15:56] <nick_> What are TIMEPULSE and VBCK?
[15:56] <nick_> timepulse is just a clock oscillator?
[15:56] <UpuWork> TIMEPULSE just gives a 1Hz pulse out can be used for timing
[15:56] <jonsowman> VBCK is a backup battery
[15:56] <UpuWork> and VBCK you either connect to a battery or to GND
[15:56] <UpuWork> by default and as supplied its wired to ground
[15:56] <nick_> OK
[15:57] <UpuWork> you can cut a small track and plug in a battery
[15:57] <Laurenceb> it gives very fast lock
[15:57] <UpuWork> check the uBlox data sheet gives the information
[15:57] <UpuWork> under an open sky they are pretty damn quick even without a battery
[15:57] <nick_> And you offer it without the header pins?
[15:58] <UpuWork> as standard
[15:58] <nick_> So maybe if I was clever I could arrange my breakout pins to fit this pinout.
[15:59] <UpuWork> you only really need 4 wires RX/TX/GND and 3.3V
[15:59] <UpuWork> so shouldn't be too hard
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[15:59] <UpuWork> right I need to shoot, I'll be back later if you have any more questions
[16:00] <nick_> Yeah, really it's just a case of locating them in the right places relative to each other.
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[16:27] <Laurenceb> the i2c interface can be useful too
[16:27] <Laurenceb> the ublox buffers the data internall on i2c
[16:28] <Laurenceb> +y
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[16:38] <jcoxon> afternoon
[16:39] <SpeedEvil> Afternoon.
[16:39] <SpeedEvil> Almost evening.
[16:39] <jonsowman> Laurenceb: can also attach an eeprom to save config
[16:39] <jonsowman> totally worth it imo
[16:39] <jonsowman> no worrying about flight mode etc
[16:39] <Laurenceb> oh i hadnt realised that
[16:39] <Laurenceb> neat
[16:40] <jonsowman> wombat and joey have that, and a USB port
[16:40] <jonsowman> so can do all the config via u-center
[16:40] <Laurenceb> i was thinking of putting a ublox6 on i2c with a imu
[16:40] <Laurenceb> saves a usart and asyncronous data faff
[16:41] <jonsowman> yes indeed
[16:42] <Laurenceb> bbl
[16:43] <number10> jonsowman: predictions not looking too good for joey launch
[16:43] <jonsowman> number10: friday is looking best at the moment, we're waiting for the 6pm prediction run before we call it
[16:43] <jonsowman> ground weather in cambridge on friday is looking rainy though
[16:43] <jonsowman> so probably not going to happen this week unfortunately
[16:44] <Randomskk> :(
[16:44] <Randomskk> the next prediction run will decide it tbh
[16:44] <Randomskk> if it moves more inland then we are in with a chance
[16:44] <number10> :( - the hourly run shows it hugging the coastlije between now and friday
[16:44] <Randomskk> but if it drifts at all closer to the sea for sure no
[16:45] <number10> what size balloon was planned?
[16:45] <jonsowman> probably a 1kg totex
[16:45] <jonsowman> it's not a light payload
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[16:46] <number10> did you complete the electronics
[16:46] <jonsowman> yep Joey and Wombat are both ready to go
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[16:54] <jcoxon> hey number10
[16:55] <jcoxon> we are thinking of trying to launch again on sunday morning
[16:55] <number10> ok, still need a hand
[16:55] <jcoxon> of course
[16:55] <jcoxon> the more the merrier
[16:55] <number10> :)
[16:56] <number10> thats good - 0900 or other time - you'll let me know nearer I am sure
[16:56] <jcoxon> yeah meet at 0900
[16:57] <number10> great - i have been instructed to take load of pics by Upu
[16:57] <jcoxon> oh right
[16:57] <number10> but I will try and be of assistance
[16:57] <jcoxon> indeed
[16:58] <jcoxon> hehe, its a fun flight path
[16:58] <jcoxon> http://habhub.org/predict/#!/uuid=fc64822c2e065d5e8e09785a54709fd5a17a19c5
[16:59] <number10> wow
[16:59] <number10> that is fun
[16:59] <jcoxon> ignore hte maddness at hte end
[16:59] <jonsowman> that's really cool
[17:00] <nick_> Someone gave me a hammer and suddenly a bunch of nails popped up.
[17:01] <jonsowman> that happens
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[17:44] Nick change: earthshine_ -> earthshine
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[17:50] <Upu> http://imgur.com/a/xALSW see if that keeps the crystal more stable
[18:11] <fsphil> what is that?
[18:12] <fsphil> ah just that polystrene stuff
[18:12] <SpeedEvil> A foam home.
[18:12] <pjm> bubble-wrap is also excellent for assisting with thermal stab. its light weight too
[18:13] <jonsowman> bursts at altitude :)
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[18:13] <SpeedEvil> Not if you puncture it
[18:14] <jonsowman> well, true
[18:14] <fsphil> but that'll let the magic gas out!
[18:15] <pjm> ah does it really burst! i'd have thought it would be stretchy enuf to tollerate that
[18:15] <pjm> but good point!
[18:15] <jonsowman> i tried it a while back
[18:15] <jonsowman> they all burst
[18:15] <jonsowman> shame really
[18:15] <pjm> yeah thats useful to know
[18:16] <pjm> so lumps of polystyrene are the way to go
[18:16] <pjm> thats whats in the viasala sondes
[18:16] <SpeedEvil> I guess a rough test would be to apply a load of 1kg/cm^2
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[19:59] <Upu> cuddykid__
[19:59] <cuddykid__> hiya
[19:59] <Upu> Found something for you : http://tieba.baidu.com/p/1461054097
[19:59] <cuddykid__> lol
[20:00] <cuddykid__> that's too much even for me! haha
[20:00] <Upu> :)
[20:00] Nick change: cuddykid__ -> cuddykid
[20:01] <cuddykid> brill, got the port forwarding working :)
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[20:57] <nick_> My ultrasound rangefinder arrived :)
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[20:59] <Lunar_Lander> hello
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[21:04] <Lunar_Lander> btw when we were talking about trains lately, have a look what I saw yesterday at Gelsenkirchen main station: http://s.gullipics.com/image/k/j/5/5ztpi3-j8e4uu-rv4g/IMG0075.jpeg
[21:06] <Dan-K2VOL> ha, hope the power was off
[21:07] <Lunar_Lander> I am afraid not cause the line next to us where he was walking on the roof was in service
[21:08] <jcoxon> evening all
[21:09] Action: jcoxon gives up trying to compile scipy
[21:10] <Lunar_Lander> hello jcoxon
[21:11] <jcoxon> hey
[21:11] <Lunar_Lander> how are you?
[21:11] <jcoxon> good thanks
[21:11] <jcoxon> you?
[21:12] <griffonbot> @HighAltitudeLab: Every day, my Arduino and the GPS are able to do more things, it's awesome to learn how to program! #ukhas [http://twitter.com/HighAltitudeLab/status/215552709313572865]
[21:12] <Lunar_Lander> well that says it
[21:12] <Lunar_Lander> xD
[21:13] <Lunar_Lander> and you're welcome
[21:13] <jcoxon> hehe
[21:17] <gonzo_> notam advice.... How do you give a postal address of a field?
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[21:22] <Lunar_Lander_> sorry PC hang
[21:23] <gonzo_> didn't miss anything
[21:23] <Lunar_Lander_> thanks
[21:23] <SpeedEvil> http://slashdot.org/poll/2395/give-me-a-solder-gun-and-i-can-produce-
[21:25] <gonzo_> give it me and I produce a smashed solder gun, or is that 'put beyond use' ?
[21:26] <joph> I solder BGA connections for fun, blindfolded.
[21:26] <joph> epic :D
[21:26] <Lunar_Lander_> XD!
[21:28] <SpeedEvil> You can do that with an oven
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[21:28] <joph> Give me a solder gun, and I can produce...shut up and take my money!
[21:28] <joph> i prefer pizza
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[21:28] <SpeedEvil> you should not cook pizza with a soldering gun.
[21:29] <joph> lol
[21:29] <SpeedEvil> It ruins the tip.
[21:29] <joph> nice idea :D
[21:30] <joph> you can use a annealing oven for making pizza, why not a reflow oven for pizza? :D
[21:30] <joph> or heat the stone oven with soldering guns :D
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[21:48] <Lunar_Lander_> xD
[21:51] <gonzo_> not tried using my furnace for food yet
[21:51] <gonzo_> prob not a good idea given the nasties they have been in there
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[22:30] <joph> gonzo_, you can make beef and pork loaf in a high temperature oven, I know a company where they make this one day in a week for breakfast :D
[22:31] <Lunar_Lander_> XD
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[22:37] <joph> i don't know if the translation is correct, but I mean "leberkäse", i hope dict.cc was right :D
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[22:41] <joph> Lunar_Lander_, http://d24w6bsrhbeh9d.cloudfront.net/photo/4542816_460s.jpg
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[23:01] <Lunar_Lander_> sorry joph was AFK
[23:02] <Lunar_Lander_> joph, XD!
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[00:00] --- Thu Jun 21 2012