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[06:54] <griffonbot> Received email: Anthony Stirk "[UKHAS] ISS Passes"
[07:04] <griffonbot> Received email: Colin Tuckley "Re: [UKHAS] ISS Passes"
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[07:14] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] ISS Passes"
[07:22] <griffonbot> Received email: Costyn van Dongen "Re: [UKHAS] ISS Passes"
[07:24] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] ISS Passes"
[07:28] <costyn> Upu: I'm not sure what I'm looking at in your image. The white smudge in the middle is condensation ?
[07:28] <Darkside> yes
[07:28] <UpuWork> http://imgur.com/a/SuYhY
[07:28] <Darkside> moon is on the lupper left
[07:28] <UpuWork> we are pretty sure its just lense flare
[07:29] <UpuWork> the moon is very faint on the picture I linked in the mail
[07:29] <costyn> that white spot?
[07:29] <costyn> very bright?
[07:29] <Darkside> looks like lens flare
[07:29] <Darkside> ISS wouldn
[07:29] <Darkside> wouldn't be that bright
[07:29] <costyn> agreed
[07:29] <fsphil> the ISS would be backlit in that shot
[07:29] <fsphil> it would be darker than normal
[07:30] <costyn> it's a lens flare, where the ccd has been overexposed
[07:30] <Darkside> UpuWork: did you shoot in 1080p?
[07:30] <costyn> was it a GoPro?
[07:35] <UpuWork> yes
[07:35] <UpuWork> 1080p
[07:35] <UpuWork> and yes was a go pro
[07:35] <UpuWork> cheers
[07:36] <UpuWork> I like Stellarium
[07:37] <fsphil> that program is great
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[07:41] <griffonbot> Received email: Graham Shirville "Re: [UKHAS] ISS Passes"
[07:42] <griffonbot> Received email: Allen Sklar "[UKHAS] Arduino and GPS"
[07:45] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] ISS Passes"
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[08:00] <costyn> UpuWork: you should check out Celestia as well, you can fly through space, very cool
[08:01] <jcoxon> morning
[08:01] <daveake> morning
[08:01] <UpuWork> morning jcoxon
[08:10] <WillDuckworth> what's the numbers for the conf so far?
[08:11] <jcoxon> 17 on the latest list
[08:11] <jcoxon> but it might need to be updated
[08:11] <jcoxon> still space
[08:19] <jcoxon> WillDuckworth, you going to come?
[08:21] <UpuWork> he's on the list jcoxon
[08:21] <jcoxon> oh yeah
[08:21] <jcoxon> hehe
[08:23] <griffonbot> Received email: Graham Shirville "Re: [UKHAS] ISS Passes"
[08:25] <jcoxon> UpuWork, so i've been looking at that picture
[08:25] <jcoxon> do you know when it was taken?
[08:28] <UpuWork> yeah
[08:28] <UpuWork> the one with the moon in ?
[08:28] <UpuWork> was taken about 10 seconds before burst
[08:29] <jcoxon> the one you posted to the list
[08:29] <UpuWork> 13:54:59 ish
[08:29] <UpuWork> UTC
[08:30] <jcoxon> and i assume its teh white bob to the left of the big lens flare
[08:31] <UpuWork> frozen lense
[08:32] <UpuWork> it steamed up quite badly even though we had the anti misting strips in it
[08:32] <jcoxon> i see
[08:32] <jcoxon> fair enough
[08:33] <jcoxon> iss is overhead right now :-)
[08:35] <daveake> I wish pilots would look at the dates on a notam
[08:35] <UpuWork> still getting calls ?
[08:35] <daveake> got one just now
[08:36] <daveake> for today
[08:36] <daveake> but the notam was for sat/sun only
[08:36] <UpuWork> bit concerning
[08:36] <daveake> Good job they don't do anything that requires attention to detail
[08:37] <daveake> ooer
[08:37] <daveake> actually ....
[08:37] <daveake> .... it's the notam that's wrong :)
[08:38] <UpuWork> the NOTAM is for all week
[08:38] <UpuWork> haha
[08:38] <daveake> lol
[08:38] <UpuWork> Quick get a balloon up
[08:38] <daveake> OK who has gas? :D
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[08:40] <daveake> The permission has last weekend and next weekend on it
[08:40] <UpuWork> aren't you suppose to cancel next weekend ?
[08:41] <daveake> I have but DM was out Mon/Tue
[08:41] <daveake> The permission also says 2 flights only
[08:41] <daveake> but damn, now I'm going to get calls all week :(
[08:42] <UpuWork> ask him to revoke it ?
[08:42] <daveake> Yup, about to
[08:42] <daveake> Ah, actually ....
[08:42] <daveake> ... the notm is correct it's got the schedule at the nottom
[08:42] <daveake> FROM: 14 Jul 2012 07:45 GMT (08:45 BST) TO: 22 Jul 2012 15:00 GMT (16:00 BST)
[08:42] <daveake> SCHEDULE: 14 15 21 AND 22 0745-1500
[08:43] <UpuWork> they are reading the wrong bit
[08:43] <daveake> So the pilot read the from/to and not the schedule
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[08:43] <daveake> ok all is well then
[08:44] <daveake> and the map on notaminfo isn't looking at the schedule
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[09:06] <fsphil> nyanfax works :)
[09:06] <bambi> Hello HABers How is your day?
[09:08] <bambi> gee that bad? *smiles*
[09:09] <UpuWork> busy :)
[09:10] <bambi> ah yes'
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[09:24] <fsphil> also quite early in the morning up here :)
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[09:28] <bambi> have another cafe latte - thats what I do *smiles*
[09:29] <fsphil> just has some toast.. proper toast, not the mildly warm bread that some people claim is toast
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[09:31] <costyn> not a bad idea
[09:33] <UpuWork> you got mail bambi
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[09:39] <WillDuckworth> anyone know why the sabre engine needs to pre cool the air?
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[09:43] <jcoxon> ask eroomde
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[09:44] <griffonbot> @HighAltitudeLab: Testing sending Twitter texts from Ubuntu's Gwibber software. #ukhas [http://twitter.com/HighAltitudeLab/status/225526347823460352]
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[09:48] <WillDuckworth> hi jcoxon - yep am coming to the conference (was afk), looking forward to it
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[10:22] <staylo> http://www.bbc.co.uk/news/uk-england-derbyshire-18876537 < currently linked from the bbc main page as 'working jet engine made from Lego'
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[10:23] <LazyLeopard> Hmmm... BBC headline writer strikes again... ;)
[10:24] <fsphil> they do that a lot
[10:24] <fsphil> its very annoying
[10:25] <nick_> I get the impression that noone reads other people's articles on the BBC website before they get published.
[10:25] <LazyLeopard> Not the only things they get wrong, mind... ;)
[10:26] <nick_> The BBC should realise that their branding means they don't have to be aiming to get articles out 30 seconds before their competitors, they have to get them right.
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[10:27] <staylo> Guess I should have read the article title before I started work on my lego pig
[10:27] <LazyLeopard> ;)
[10:27] <daveake> LegoSpiderPig?
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[10:33] <bambi> UpuWork . Thank you
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[11:23] <kokey> nick_: actually when it comes to television, they're way too slow
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[11:29] <daveake> Is see He has gone up (in price) since last time I bought any
[11:34] <kokey> hmmm... "Unfortunately, you can not recover helium from shale gas"
[11:34] <kokey> darn
[11:36] <BrainDamage> the problem is this idiocy: https://en.wikipedia.org/wiki/National_Helium_Reserve
[11:36] <BrainDamage> and some retarded politician move
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[11:50] <fsphil> retarted is redundant in that sentence
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[13:39] <kokey> I wonder what would be the simplest way to get some rtl-sdr action on my mac
[13:39] <kokey> I had an ubuntu build with it and gnu radio going, running under vmware fusion on my mac
[13:39] <Darkside> i have gnuradio compiled on my mac
[13:39] <Darkside> macports handled most of the dependencies
[13:39] <Darkside> well, all, i think
[13:40] <kokey> apart from fusion's trial expiring, and ubuntu taking up loads of disk space, it didn't perform that well either
[13:40] <Darkside> i had to do some dodgyness to get gnuradio to look in the right places while compiling
[13:40] <kokey> it's ok, compiling gnuradio always has some tricks to it
[13:40] <Darkside> heh
[13:40] <Darkside> i had to disable one or two modules
[13:40] <kokey> hmmm, yeah maybe I should update xcode on my mac and go that route
[13:40] <nick_> I'd like to try out gnuradio on raspbian
[13:41] <kokey> I'm on snow leopard, hope it doesn't mean I have to upgrade OS first
[13:41] <nick_> Or more accurately I'd like someone else to try it...
[13:41] <Darkside> i don't think gnuradio has proper ARM optomizations yet
[13:41] <Darkside> kokey: i don't think you'll need to upgrade OS
[13:41] <Darkside> it'll possibly be easier on snow leopard
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[13:42] <kokey> ah yeah I think I remember now, to install the iphone sdk required and xcode upgrade, my memory turned it into installing xcode requires an OS upgrade
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[13:42] <kokey> that's fine then, I managed to free up enough disk for an xcode upgrade now
[13:43] <Darkside> id you already have macports installed, you'll need to reinstall after upgrading xcode
[13:43] <Darkside> critical binaries (like.. gcc) are in different places in the new xcode
[13:43] <kokey> yeah, I have a macports install from early 2009 I think
[13:44] <kokey> I should really go that route
[13:44] <kokey> since I want to write my own stuff for the rtl-sdr
[13:45] <kokey> stuff that can be ported to the pi etc.
[13:45] <kokey> assuming I spend enough time on it
[13:45] <Darkside> the issue is more about gnuradio's backend stuff
[13:45] <Darkside> and whether its been optomised for ARM or not
[13:45] <Darkside> i think its being worked on
[13:46] <kokey> well gnuradio's a big beast, it would be nice to be able to put some specific things together that doesn't use it
[13:46] <Darkside> ahh but the problem is, its the gruel backend, which everything uses
[13:46] <kokey> though the best libs I've seen for all the gnuradio functions were commercial
[13:51] <kokey> ok I might be getting myself way too sidetracked here, the purpose really is to use the rtl-sdr to test if I set up the rfm22b up right
[13:51] <Darkside> hehe
[13:51] <kokey> too bad there isn't a simple tool for osx for that
[13:52] <MrScienceMan> i was wondering recently, if i can run a aprs igate on the pi
[13:52] <kokey> perhaps I'll borrow the girlfriend's netbook and install one of the windows things
[13:52] <Darkside> MrScienceMan: sure you can
[13:52] <Darkside> well
[13:52] <Darkside> if it had audio input you could
[13:52] <Darkside> or you could use an external TNC and a RS232 to TTL or usb converter
[13:52] <MrScienceMan> yeh, i was thinking using sdr
[13:52] <Darkside> ok thats getting a bit different then
[13:53] <MrScienceMan> yep
[13:53] <Darkside> that'd be SDR -> soundmodem
[13:53] <Darkside> which is probably a bit much for the rpi to handle
[13:54] <MrScienceMan> thats my concern, otherwise I can probably hook it to a handheld
[13:59] <kokey> I'm wondering what the potential is for an ISM band equivalent of APRS
[13:59] <Darkside> would be cool
[14:00] <Darkside> but you;d have to check the licensing on AX.25
[14:00] <Darkside> i know it can't be used for commercial use
[14:00] <Darkside> i was thinking of experimenting with an AX25 based system (though not with AFSK) using the rfm22b modules
[14:01] <Darkside> trying to make a little packet repeater netowrk with a few of them
[14:01] <kokey> ah yeah that's a good idea
[14:01] <Darkside> run them at 1200 baud, or lower
[14:01] <Darkside> probably lower
[14:01] <Darkside> around here i could probably get away with 100mW without anyone noticing
[14:01] <gonzo_> 300bd fsk on HF was common
[14:02] <Darkside> yeah
[14:02] <Darkside> but those modules won't go that low :P
[14:03] <gonzo_> 70 cm is low enough for civilised people
[14:03] <Darkside> nah i mean baud rate
[14:03] <Darkside> they don't seem to work below 500 baud
[14:03] <kokey> really?
[14:03] <Darkside> yeah
[14:04] <gonzo_> ah, understand
[14:04] <kokey> rx that is?
[14:04] <Darkside> i couldn't get gmsk to work below 500 baud
[14:04] <Darkside> yeah
[14:04] <daveake> Darkside: http://hackaday.com/2012/07/18/sending-a-raspberry-pi-to-130000-feet/
[14:04] <Darkside> hell, not even sure tx worked
[14:04] <Darkside> daveake: let the flood begin
[14:04] <gonzo_> if you are writing your own, there are peobably better protiocols than ax25
[14:04] <daveake> wellies on
[14:04] <WillDuckworth> nice one dave
[14:05] <Darkside> funny how they make it seem like the rpi was the main telemetry payload
[14:05] <Darkside> which is sure as hell wasn't
[14:05] <daveake> nope
[14:06] <Darkside> wheres the disclaimer on your blog post dave
[14:06] Action: daveake checks server
[14:06] <daveake> OK so far ... :)
[14:06] <Darkside> your*
[14:06] <WillDuckworth> [david]
[14:06] <Darkside> gonzo_: but i want to tie it directly into the linux kernel ax25 stuff
[14:07] Action: kokey checks out AX.25
[14:07] <daveake> edit fail I assume [Will]#
[14:07] <kokey> ah, based on X.25... sounds like a good idea
[14:08] <kokey> annoying if it's not allowed to be used outside of amateur use
[14:08] <WillDuckworth> daveake - did you supply power direct to the webcam or was there enough juice from the ports?
[14:08] <Darkside> i think its just non-commercial
[14:08] <Darkside> but not sure
[14:08] <Darkside> WillDuckworth: be bypassed the fuses
[14:09] <daveake> WillDuckworth It's in my blog :p
[14:09] <daveake> ^^ whs
[14:09] <WillDuckworth> thought that was the case
[14:09] <kokey> lemme see if I can ask ofcom
[14:09] <WillDuckworth> getting soldering iron out
[14:09] <daveake> Just got the SMPS modules today
[14:09] <gonzo_> in UK the prob is that the TNCs are not going to be type-approved kit. And commercial kit must all be approved
[14:09] <Darkside> daveake: you really should be a big disclaimer on there
[14:09] <Darkside> "if you use a rpi as your main telemetry payload, you're a bloody idiot"
[14:10] <Darkside> gonzo_: ism band though
[14:10] <Darkside> you can probably get away with it
[14:10] <gonzo_> I recon it's a free for all there as only the TX modules need to be approved
[14:11] <gonzo_> (there may not even be an approval spec, what use to be MPT specs in UK. Prob summut EU now)
[14:11] <Darkside> but yeah, my plan was to write some code to make my osiris board predent to be a TNC
[14:11] <Darkside> a KISS TNC to be exact
[14:11] <Darkside> pretend*
[14:11] <Darkside> and write anotuer bit of code to implement a simple digipeater
[14:12] <Darkside> and just use the GMSK modulation/demod on the rfm22b
[14:13] <gonzo_> some amsats use (or used to use) BSPK 1200bd for their downlinks
[14:13] <Darkside> yeah
[14:13] <Darkside> with a big enough antenna at one or both ends, you can do some nice stuff
[14:13] <gonzo_> not sure iof that was based on ax25 frames?
[14:14] <Darkside> but i'm thinking about making a tiny solar powered digipeater and sticking it up the top of a tall building
[14:14] <Darkside> with a 1/4 wave antenna
[14:14] <gonzo_> nice idea
[14:14] <Darkside> the board is already small enough
[14:15] <Darkside> won't take much more effort to get it powered off a lipo cell with a solar charger
[14:15] <gonzo_> prob with digi's was, there was only acks end to end. If data was lose part way, you had to try again
[14:15] <Darkside> yeah, its not perfect
[14:15] <gonzo_> there were nodes that did acking between each step on the link
[14:15] <Darkside> but i figure it'd be fun to play around with it
[14:16] <gonzo_> I wrote a spec for a self healing network for a project years ago. Using 458meg modems
[14:17] <gonzo_> where nodes would beacon and auto route packets via the most reliable path
[14:17] <gonzo_> shame it never went anywhere
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[14:31] <griffonbot> @daveake: Now front-page on the official Raspberry Pi site :-) http://t.co/eScHQMkD #hab #ukhas #raspberry_pi [http://twitter.com/daveake/status/225598568713555969]
[14:32] <fsphil> #ooooooh
[14:32] Action: daveake checks server again
[14:34] <gonzo_> fame!
[14:35] <daveake> It's only taken 52 years :)
[14:37] <UpuWork> lol
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[14:51] <kokey> I had my 15 minutes of fame
[14:51] <kokey> when I was 18
[14:53] <kokey> wonder if slashdot will pick this one up
[14:53] <UpuWork> its been submitted
[14:54] <UpuWork> given how quick slashdot are I expect to see it sometime in 2013
[14:56] <kokey> the raspberrypi.org writeup is nicely presented
[14:57] <WillDuckworth> yep - nicely done liz@rpi
[14:57] <costyn> daveake: very nice sir!
[14:57] <daveake> @daveake Thanks so much for using a Raspi in your setup, Dave - seriously most impressive thing I think we've seen done with one.
[14:58] Action: daveake blushes
[15:01] <kokey> it's quite a winner combo really, being first, being high, broadcasting images
[15:01] <craag> Yeah live images transmitted from the pi itself trumps anything else out there!
[15:01] <Darkside> and using something people have been frothing over for a long time
[15:02] <kokey> yeah the raspberry pi buzz by itself was huge
[15:02] <craag> Some people are having trouble getting webcams to work with it at home, but this guy did it in near-space!!
[15:02] <Darkside> lol
[15:02] <UpuWork> fair comment
[15:02] <kokey> it was like launching a running copy of nuke nukem forever
[15:02] <kokey> duke
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[15:05] <daveake> Re webcams - that's because people don't think. Or test. Every owner should have and use a multimeter :-)
[15:06] <daveake> The "5V" line to the webcam dropped to about 3V when I tried it initially.
[15:08] <craag> Mm, I'm having similar issues with usb soundcards and 3G dongles. Did you say you shorted out the usb fuse on the RPi itself?
[15:08] <navrac_work> I laughed at the obligatory 'waving the arms' to get the balloon to go up on the video. I like to combine it with a launching dance...
[15:08] <daveake> lol
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[15:08] <daveake> That was the physical rendition of the mental "please, not the tree AGAIN"
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[15:09] <daveake> It was some sight, I can tell you
[15:09] <daveake> The train that is, not me
[15:09] <UpuWork> it was alot of train
[15:09] <fsphil> someone likes trains
[15:09] <daveake> I've seen shorter trains on the Santa Fe railway
[15:10] <UpuWork> <3 internet
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[15:10] <UpuWork> vertical video syndrome
[15:10] <UpuWork> never heard that one
[15:10] <daveake> Yeah, Julie did that before on the video
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[15:11] <WillDuckworth> dave'll have to get his social media hat on and get tweeting & g+ ing
[15:11] <kokey> UpuWork: http://www.youtube.com/watch?v=Bt9zSfinwFA
[15:11] <UpuWork> yeah saw it :)
[15:11] <daveake> lol that's funny :)
[15:12] <kokey> I did a vertical video this weekend when I filmed my arduino playing tunes using an iphone speaker assembly
[15:12] <daveake> to be fair, the train was vertical
[15:12] <fsphil> the very first TV's where vertical
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[15:14] <kokey> actually they were circular I think
[15:14] <kokey> modified oscilloscope tubes
[15:15] <kokey> vertical TVs are quite common in games arcades ;-)
[15:15] <daveake> I had a Vectrex aaaages ago, with one. Vector scan too.
[15:16] <fsphil> lol, love the top comment
[15:16] <daveake> on...?
[15:16] <fsphil> the vertical video page
[15:17] <daveake> lol
[15:18] <fsphil> at least the internet has consistance
[15:18] <fsphil> consistency even
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[15:24] <navrac_work> oh dear sprayed coffee all over the keyboard watching that video
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[16:00] <Hialt> hello
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[16:49] <Lunar_LanderU> hello
[16:49] <joelio> excellent.. usb dvb-t dongle arrived today. gnuradio and rtl-sdr built
[16:49] <joelio> Lunar_LanderU: hello
[16:51] <Lunar_LanderU> today I tried to run two analogue reference voltages on the arduino, 3.3V for my humidity sensor & 2.56V for the battery potential divider. I made two functions for each and included analogReference(DEFAULT) in the first function and analogReference(INTERNAL2V56) in the second one. I get plausible humidities but a battery voltage of 1.3V from the 3 battery pack. when I tried the other reference before without the humidity
[16:51] <Lunar_LanderU> sensor, I got correct values.
[16:51] <Lunar_LanderU> hi joelio
[16:52] <nick_> Why do you need to analog references?
[16:52] <nick_> two
[16:52] Action: nick_ can't seem to type today
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[16:53] <Lunar_LanderU> the humidity sensor needs the 3.3V reference, while I was told that this reference may deviate when the batteries run low, thus I should use the 2.56 V or 1.1V reference for the batteries
[16:55] <nick_> How low does the battery need to get before the arduino can't maintain the 3.3V reference?
[16:56] <nick_> Is that not too low to even run the arduino?
[16:56] <Lunar_LanderU> good question
[16:56] <nick_> I mean, it runs most things at 5V, no?
[16:57] <Lunar_LanderU> this is a 3.3V arduino
[16:57] <nick_> OK
[16:59] <Lunar_LanderU> what I read is that you have to wait some time for the references to switch
[16:59] <Lunar_LanderU> but when I introduced a 1000 ms delay, that also did not change anything
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[17:00] <Lunar_LanderU> well, have to leave for the moment
[17:00] <Lunar_LanderU> be back later
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[17:06] <daveake> Lunar_LanderU You don't need to references
[17:07] <daveake> Oh too late :)
[17:07] <daveake> two dammit
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[17:15] <nigelvh> Raspberry Pi Guys: Slashdot says a new customized image of debian has been released for the Pi. Supposedly it's much better. http://hardware.slashdot.org/story/12/07/18/1451204/debian-derivative-optimized-for-the-raspbery-pi-released
[17:16] <Upu> yeah makes web browsing quicker
[17:16] <Upu> should help @ 40km
[17:17] <nick_> It might make a big difference for running SDR on it.
[17:17] <Upu> thats a point
[17:18] <Upu> I'll try it out
[17:18] <nick_> I assume that has a decent amount of division involved
[17:18] <jonsowman> fingers crossed
[17:18] <nigelvh> Supposedly it does better support of floating point
[17:18] <daveake> Sounds like a big improvement
[17:19] <daveake> Not that I'm pushing the processor as it is!
[17:19] <nick_> RPi + one of these dongles could be a neat tracking computer
[17:19] <daveake> yep
[17:19] <MrScienceMan> anyone happens to have a HX1 hanging around?
[17:20] <fsphil> I've got dl-fldigi compiled for raspbian a while back but unable to run it, the keyboard stops working as soon as I plug in the usb sound dongle
[17:20] <nigelvh> Yeah, I've got an HX1 MrScienceMan
[17:21] Action: LazyLeopard has observed that fldigi stops decoding when it runs low on CPU grunt...
[17:21] <LazyLeopard> ...or rather, stops decoding accurately...
[17:21] <fsphil> indeed, starts loosing samples
[17:21] <LazyLeopard> It spews garbage instead.
[17:22] <fsphil> I'll try it agaon with a better usb hub
[17:22] <nick_> Is there a dl-fldigi backend that you can use?
[17:22] <fsphil> again
[17:22] <fsphil> brb, doggie walk
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[17:29] <MrScienceMan> anyone based in europe happen to have a HX1 144.80 hanging around? :)
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[17:39] <nigelvh> MrScienceMan: I think Upu has some in stock in his store. http://ava.upuaut.net/store/index.php?route=product/product&path=71_63&product_id=69
[17:39] <fsphil> you can buy them from upu's shop
[17:39] <fsphil> ^^
[17:39] <nigelvh> Beat ya to it fsphil
[17:40] <MrScienceMan> Products marked with *** are not available in the desired quantity or not in stock!
[17:40] <MrScienceMan> :(
[17:40] <nigelvh> "Availability: In Stock"
[17:40] <MrScienceMan> trying adding it to cart :)
[17:41] <nigelvh> You seem to be correct.
[17:41] <nigelvh> Upu ping.
[17:41] <Upu> hello
[17:41] <Upu> hx1's ?
[17:41] <Upu> sorry not in stock
[17:41] <nigelvh> Yeah
[17:42] <nigelvh> Darn
[17:42] <Upu> I should have taken them off sorry
[17:42] <nigelvh> Sorry MrScienceMan, I tried!
[17:42] <MrScienceMan> Upu: perhaps you can suggest a shop in europe that might have them?
[17:42] <Upu> I can possibly get some in how many are you wanting ?
[17:42] <MrScienceMan> nigelvh: thanks :)
[17:43] <MrScienceMan> need 1 and quick
[17:43] <Upu> I sold the last one I had last week
[17:43] <Upu> define quick
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[17:43] <MrScienceMan> erm, 3-5 working days
[17:44] <Upu> probably not happening
[17:44] <Upu> sorry
[17:44] <Upu> have you tried radiometrix direct ?
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[17:48] <MrScienceMan> yes
[17:48] <daveake> Farnell?
[17:51] <MrScienceMan> they dont have hx1
[17:51] <daveake> ok
[17:51] <daveake> and RM won't sell direct? Did you ask them for a local disti?
[17:54] <MrScienceMan> found one distributor nearby, but they had the US version
[17:54] <MrScienceMan> for some reason
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[17:55] <daveake> I wondered about taking up the Watson etc
[17:56] <daveake> Set up a base camp as well as chase car
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[18:01] <Upu> ok MrScienceMan I'll speak to RM tomorrow and see if I can get one or two ordered in
[18:02] <MrScienceMan> Upu: thanks :)
[18:02] <Upu> they can be funny about the prices sometimes though so they may be £24 each with delivery but I'll confirm for you
[18:03] <MrScienceMan> thats fine, thanks again
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[18:46] <Laurenceb_> fsphil: tried fldigi on raspbian?
[18:47] <fsphil> the packaged version crashes, the one I built runs but I can't test it, the usb keyboard and mouse both stop working when I plug in the USB sound thingy
[18:48] <fsphil> power problems likely
[18:48] <fsphil> although it's a powered hub
[18:50] <Laurenceb_> i suspect the usb support in the kernel
[18:50] <Laurenceb_> i hear it has issues
[18:52] <Laurenceb_> http://www.raspberrypi.org/phpBB3/viewtopic.php?t=11039&p=122715
[18:52] <fsphil> or that.. this was a beta version of raspbian, so I'll try again with the release they made today
[18:53] <fsphil> aah
[18:53] <fsphil> that may explain my problem
[19:00] <Laurenceb_> usb is pretty horrific
[19:01] Action: Laurenceb_ has been fighting usb bugs for the past 2 weeks
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[19:08] <fsphil> usb did make things simpler back in the day :)
[19:09] <kokey> hmmm
[19:09] <Laurenceb_> im trying to do dma mass storage transfers on stm32
[19:09] <kokey> I wonder if I should use the arduino tx and rx to talk to the ublox or not
[19:09] <Laurenceb_> but my pc (host) keeps doing ioctrl commands in the middle of transfers
[19:09] <Laurenceb_> which is kind of annoying
[19:12] <fsphil> I'll try again, got another usb hub
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[19:16] <Laurenceb_> check the supply voltage maybe as well
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[19:17] <upix> hello everyone
[19:19] <Laurenceb_> lol
[19:19] <Laurenceb_> just reading raspberry pi forums
[19:19] <Laurenceb_> i suspect they have polyfuse issues
[19:19] <fsphil> hullo upix
[19:20] <daveake> yup
[19:20] <daveake> short the buggers out
[19:20] Action: fsphil is watching the presentation CUSF give to amsat
[19:20] <daveake> :)
[19:20] <daveake> <<=== explosive thing
[19:20] <fsphil> lol
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[19:23] <Lunar_Lander> hello
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[19:24] <upix> hey Lunar_Lander
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[19:25] <Lunar_Lander> hi upix
[19:25] <Lunar_Lander> you are from Latvia right?
[19:25] <upix> close
[19:25] <Laurenceb_> http://www.flickr.com/photos/ben_on_the_move/6967016434/in/photostream
[19:25] <Laurenceb_> lol
[19:25] <Lunar_Lander> Lithuania?
[19:25] <upix> ya
[19:25] <Lunar_Lander> ah
[19:25] <Lunar_Lander> cause on sparkfun someone posted a link to the "GLORY" project
[19:26] <Lunar_Lander> which is a HAB flyer from Lithuania
[19:26] <Lunar_Lander> do you know him?
[19:26] <fsphil> someone burnt their pi
[19:27] <MrScienceMan> http://l.yimg.com/g/images/buddyicon.gif
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[19:28] <Lunar_Lander> upix, http://www.glory.lt/index.php
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[19:29] <jonsowman> http://www.glory.lt/_images/iranga/mot_plokste.jpg
[19:29] <jonsowman> wow
[19:29] <upix> Lunar_Lander: not personnaly, he's studying in my faculty
[19:29] <Lunar_Lander> ah
[19:29] <upix> my friend met him
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[19:29] <Lunar_Lander> cool
[19:29] <Lunar_Lander> how is he like?
[19:29] <upix> i dunno
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[19:29] <upix> what do you mean by how?
[19:29] <number10> that looks like art
[19:30] <Lunar_Lander> like is he friendly
[19:30] <jonsowman> http://www.glory.lt/_images/iranga/elektronika.jpg
[19:30] <upix> don't know that, but i guess so
[19:30] <Lunar_Lander> ah
[19:30] <Lunar_Lander> yeah the number of headers is enormous
[19:30] <kokey> arduino talking to ublox, success
[19:30] <Lunar_Lander> have a look at the battery board
[19:31] <Lunar_Lander> http://www.glory.lt/_images/iranga/bat_plokste_m.jpg
[19:31] <MrScienceMan> those curcuit boards are beautiful
[19:31] <upix> i think it's more of a backbone
[19:31] <upix> to keep it together
[19:31] <Lunar_Lander> yea
[19:31] <Lunar_Lander> does "Plokste" mean circuit board?
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[19:31] <jonsowman> can't decide whether awesome or pointless
[19:31] <jonsowman> perhaps both
[19:31] <upix> more or less
[19:32] <upix> more of a board
[19:32] <upix> "board"
[19:32] <Lunar_Lander> ah
[19:32] <upix> but in that context it means PCB
[19:32] <Lunar_Lander> ah
[19:32] <Lunar_Lander> http://www.glory.lt/_images/paieskos/05_m.jpg
[19:33] <Lunar_Lander> the ever present 808 camera
[19:33] <Lunar_Lander> xD
[19:33] <Lunar_Lander> http://www.glory.lt/_images/glory_1/arduino_m.jpg
[19:33] <Lunar_Lander> this looks interesting
[19:33] <Lunar_Lander> "U~uot konstravs vis Arduino Duemilanove plokat, pasidariau tik USBUART dal/. Nams slygomis pagaminau labai smulki plokat ir /litavau mikroschem, kurios tarpai tarp kojelis  0,2 mm.2
[19:33] <Lunar_Lander> what does it mean?
[19:34] <mattbrejza> use chrome, it translates :)
[19:34] <Lunar_Lander> xD
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[19:37] <Lunar_Lander> Google says
[19:37] <Lunar_Lander> "Instead of constructing the "Arduino Duemilanove" card, I made only a USB-UART part. Home conditions produce a very small chip card and /litavau that the spaces between the legs - 0.2 mm.2"
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[19:39] <upix> I'm not much of a good translator but more or less: "Instead of constructing the "Arduino Duemilanove" card, I made only a USB-UART part. I've made a very small PCB in home conditions and soldered a microchip, that had 0.2mm spaces between the pins."
[19:39] <Lunar_Lander> thanks
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[19:41] <upix> his page is a mixture of step by step tutorial for building a baloon and history/reasons/feelings/experience
[19:41] <Lunar_Lander> ah
[19:41] <Lunar_Lander> cool!
[19:42] <MrScienceMan> 4 m 3 of hydrogen gas.
[19:42] <MrScienceMan> :x
[19:43] <upix> why the faces
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[19:43] <MrScienceMan> im scared of hydrogen
[19:44] <upix> it's not that scary
[19:44] <upix> and it's not that easy to make it explode
[19:44] <upix> though if it does...
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[19:46] <upix> I remember how 5 litres bottle full of hydrogen exploded basicly in my hands
[19:46] <upix> could barely hear anything for 5 minutes
[19:46] <upix> and the beeping went for another 15
[19:49] <MrScienceMan> why did it explode?
[19:54] <upix> it was a home made hydrogen torch and the fire got sucked inside reaction chamber and the ammounts turned out to be in favor of explosion
[19:55] <LazyLeopard> Used to be a standard teacher's demo. ;)
[19:58] <kokey> ok, next step would be to get some rtl-sdr love going on my mac
[19:58] <kokey> looking at GPS sentences is only fun for so long
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[20:07] <upix> does anyone know any source of information about frequency usage. when playing with sdr found quite some frequencies with irregural transmissions. wondered maybe some are sattelite or similar "devices". would be interesting to actually see what is being transmited.
[20:08] <kokey> it depends on the country really, in a big way actually
[20:08] <upix> i read there are some sattelite signals available for amateur/educational use
[20:08] <kokey> there are some spectrum maps for the UK
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[20:10] <upix> well I know that some bands are free to use (in a sence), others have purpose
[20:10] <upix> but what I'm interested in listening to open transmissions
[20:11] <upix> from sattelites or airplanes or what so ever
[20:11] <upix> but where could I find more information about frequencies they use and modulation
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[20:12] <fsphil> there's a very unusual signal I keep seeing on the 400-405mhz range, low bitrate FSK signals
[20:13] <fsphil> that constantly hop in frequency
[20:13] <Randomskk> so many ghosts on the aert
[20:13] <Randomskk> uh.
[20:13] <fsphil> I spotted them while listening out for radiosondes
[20:13] <Randomskk> æther. works better when I don't press enter halfway through
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[20:17] <upix> could those be so called nanosattelites?
[20:17] <upix> or cubesats
[20:17] <upix> or how they are called
[20:17] <fsphil> they don't seem to have any doppler
[20:17] <fsphil> they'll sit on a single frequency for a few minutes, then hop away somewhere else
[20:17] <Randomskk> if you're not pointing a circularly polarised antenna upwards you're probably not picking up cubesats
[20:18] <fsphil> nah this is my colinear
[20:18] <fsphil> it's definitely local
[20:18] <fsphil> but no idea what it is
[20:18] <Randomskk> maybe it's russian spies
[20:18] <fsphil> invading northern ireland for our ... er...
[20:18] <Randomskk> ...er..
[20:19] <upix> http://cdn.memegenerator.net/instances/400x/23648314.jpg
[20:19] <fsphil> many green fields?
[20:19] <Randomskk> sure.
[20:20] <kokey> ok, upgrading my OSX to Lion, so I can upgrade Xcode, so I can compile gnuradio etc.
[20:20] <LazyLeopard> Good luck...
[20:20] <nigelvh> Good luck with lion, or compliling gnuradio?
[20:21] <Randomskk> all three really
[20:21] <kokey> at least I got my arduino and the ublox GPS to talk to each other
[20:21] <Randomskk> god, xcode
[20:21] <Randomskk> kokey: you don't need xcode btw
[20:21] <Randomskk> you can just get the compiler
[20:21] <Randomskk> without xcode
[20:21] <LazyLeopard> Yes ;)
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[20:21] <kokey> but I need to get gnuradio working again to make sure the rfm22b transmit right, using my rtlsdr
[20:21] <kokey> I had it working before on a Linux virtual machine
[20:22] <kokey> but I might as well go native
[20:22] <kokey> Randomskk: yeah, but I figured I should just make it work through macports
[20:23] <Randomskk> eww macports
[20:23] <Randomskk> use homebrew
[20:23] <Randomskk> it's so much nicer
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[20:30] <griffonbot> @PD3EM: A great article on the @Raspberry_Pi website about the #UKHAS #HAB flight "Pi in the sky" by @daveake http://t.co/gpj4ndKK [http://twitter.com/PD3EM/status/225689074827149312]
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[20:36] <LazyLeopard> Incidentally, which payload was highest?
[20:37] <daveake> Pi
[20:37] <daveake> And the 39994 was reportd by the one 10m below it
[20:37] <LazyLeopard> Heh! ;)
[20:44] <griffonbot> @willduckworth: @daveake #ukhas RT @adafruit: Pi in the sky  Raspberry Pi in near-space! http://t.co/KKTNqfSZ [http://twitter.com/willduckworth/status/225692465775144960]
[20:46] <daveake> I'm gonna get on people's tits soon
[20:46] <jonsowman> lo
[20:46] <daveake> If I haven't already D:
[20:46] <jonsowman> l
[20:47] <jonsowman> you coming to the ukhas conf daveake?
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[20:52] <daveake> yup
[20:54] <jonsowman> cool
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[20:55] <daveake> Ultra p-eed off when I couldn't go last year
[20:55] <daveake> But that is a customer I no longer have :)
[20:55] <jonsowman> haha
[20:55] <jonsowman> excellent
[20:55] <jonsowman> in some ways
[20:56] <daveake> it is, believe me
[20:56] <jonsowman> :)
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[21:38] <Lunar_Lander> daveake, still here?
[21:39] <daveake> depends who's asking
[21:39] <daveake> Ah, you, well .....
[21:39] <daveake> :-)
[21:39] <daveake> wossup?
[21:39] <Lunar_Lander> :)
[21:39] <Lunar_Lander> how are you first of all?
[21:40] <daveake> Well I read that I'm "awesome", so "smug" is the answer
[21:40] <Lunar_Lander> oh ok
[21:40] <Lunar_Lander> well this afternoon I had the following problem
[21:40] <Lunar_Lander> today I tried to run two analogue reference voltages on the arduino, 3.3V for my humidity sensor & 2.56V for the battery potential divider. I made two functions for each and included analogReference(DEFAULT) in the first function and analogReference(INTERNAL2V56) in the second one. I get plausible humidities but a battery voltage of 1.3V from the 3 battery pack. when I tried the other reference before without the humidity sensor, I got correc
[21:40] <Lunar_Lander> t values.
[21:40] <Lunar_Lander> and I thought maybe you had an idea
[21:41] <daveake> Yes
[21:41] <daveake> First, you don't need 2 regerences
[21:41] <daveake> references
[21:41] <Lunar_Lander> OK
[21:41] <daveake> Just scale both voltages so they work with a single reference
[21:41] <Lunar_Lander> yea
[21:41] <daveake> Second, if you did, you probably need to add a delay after selecting a reference
[21:41] <Lunar_Lander> that I did
[21:42] <daveake> ok
[21:42] <Lunar_Lander> I added up to 1000 ms
[21:42] <Lunar_Lander> but that did not work
[21:42] <daveake> lots
[21:42] <daveake> ok
[21:42] <nigelvh> 3. If anything is connected to the reference pin then it's going to use that, and possibly damage the internal reference if it gets connected.
[21:42] <Lunar_Lander> someone told me that the 3.3V reference may become unstable when the batteries go down
[21:42] <Lunar_Lander> nigelvh, yeah, AREF is unconnected
[21:42] <daveake> That was me
[21:42] <Lunar_Lander> yea
[21:42] <nigelvh> Good deal.
[21:42] <Lunar_Lander> thus the contraption with the 2 references
[21:43] <Lunar_Lander> because the thing is
[21:43] <daveake> You do NOT need 2 references
[21:43] <Lunar_Lander> I thought of having the reference globally at 2.56
[21:43] <daveake> Just do the scaling
[21:43] <Lunar_Lander> but then the humidity sensor needs the voltage divider
[21:43] <fsphil> avr has a built in vref of 1.1 or 2.2v
[21:43] <daveake> Do the maths for the scaling
[21:43] <Lunar_Lander> and somehow it doesn't like that
[21:43] <Lunar_Lander> yea
[21:43] <Lunar_Lander> when I add a voltage divider to the humidity sensor, the reading becomes static
[21:43] <daveake> Remember that the available references vary according to which processor you have
[21:44] <Lunar_Lander> it doesn't react on breathing on it anymore
[21:44] <Lunar_Lander> yea
[21:44] <daveake> Well you did it wrong
[21:44] <Lunar_Lander> on the mega I got 1.1V and 2.56V
[21:44] <fsphil> daveake: you also got called a genius
[21:44] <fsphil> so you're going quite well
[21:44] <Lunar_Lander> :)
[21:44] <nigelvh> Lunar_Lander, you probably can't use a voltage divider on the 4030, the output from that is VERY low current.
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[21:45] <Lunar_Lander> yes
[21:45] <daveake> I take back everything I ever said about journos :p
[21:45] <fsphil> lol
[21:45] <Lunar_Lander> I got OpAmps today
[21:45] <Lunar_Lander> shall I try to make a voltage follower?
[21:45] <nigelvh> Using an opamp may be a better solution.
[21:45] <daveake> OK if it's high impedance then yes, you could use an op amp
[21:45] <Lunar_Lander> yea
[21:46] <Lunar_Lander> but I need to ask one thing
[21:46] <Lunar_Lander> if the reference is set to 2.56V, it says 2.56V = 1023 right?
[21:46] <daveake> So I think what you did was use resistors too low in value so you just dragged the voltage down
[21:46] <daveake> yes
[21:46] <Lunar_Lander> yeah, wait
[21:46] <nigelvh> Yes
[21:46] <Lunar_Lander> what did I use
[21:46] <Lunar_Lander> let me think
[21:46] <Lunar_Lander> I think I did use resistors not much bigger than 10 k
[21:46] <Lunar_Lander> that was not good?
[21:47] <nigelvh> That may be too much for the 4030
[21:47] <daveake> What's the impedance of the source?
[21:47] <Lunar_Lander> of the sensor?
[21:47] <daveake> yes
[21:47] <Lunar_Lander> good question :S
[21:47] <daveake> Well ....
[21:47] <daveake> .... if you just add components without knowing that stuff ....
[21:47] <daveake> ... shit happens
[21:47] <Lunar_Lander> ohh
[21:48] <Lunar_Lander> but I see that the current is 200-500 microamperes
[21:48] <daveake> Electronics is more than just wiring A to B (though sometimes it is that easy)
[21:48] <Lunar_Lander> yes
[21:48] <Lunar_Lander> and I usually read the datasheets
[21:48] <daveake> good
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[21:48] <nigelvh> The datasheet in this case doesn't list the output impedance.
[21:49] <nigelvh> Though it does list the normal current consumption as 200uA at 5V.
[21:49] <Lunar_Lander> yes
[21:49] <daveake> Always start with the datasheet
[21:49] <daveake> even if it isn't complete
[21:49] <Lunar_Lander> yes
[21:49] <Lunar_Lander> nigelvh, that gives 25 kOhms on my calculation
[21:50] <daveake> Wrong calc
[21:50] <nigelvh> Assuming that all 200uA comes out the output, which isn't the case.
[21:50] <daveake> You could have something using 200uA at 5V with a very low impedance. Current consumption with nothing connected tells you very little
[21:51] <Lunar_Lander> yea
[21:51] <daveake> A voltage regulator might consume 0.1mA normally, yet be able to deliver amps. The idle or "quiescent" current tells you nothing at all about the output impedance.
[21:51] <Lunar_Lander> yes
[21:51] <Lunar_Lander> true
[21:52] <Lunar_Lander> I forgot that, sorry
[21:52] <nigelvh> Also, the two 10k resistors in the divider with the device outputing 3V would suck down 150uA. While normally not a lot, in this case it's rather larger.
[21:52] <Lunar_Lander> yes
[21:53] <Lunar_Lander> I used the one online calculator to calculate what resistors I need to get 3.3V to 2.56V
[21:53] <daveake> If it doesn't tell you what you need ...
[21:53] <Lunar_Lander> and it said 3k and 10 k
[21:53] <daveake> ... measure it
[21:53] <Lunar_Lander> but you said those small resistors are not good
[21:53] <daveake> Take output. measure voltage. Add resistor load. measure again. then maths
[21:53] <Lunar_Lander> yes
[21:54] <daveake> Good tools: Multimeter. Brain.
[21:54] <Lunar_Lander> yeah
[21:54] <Lunar_Lander> got both
[21:54] <daveake> Poor tools: Internet
[21:54] <Lunar_Lander> ok
[21:54] <Lunar_Lander> so I measure what the voltage output is first
[21:54] <daveake> You're in good shape then :)
[21:55] <Lunar_Lander> ok :)
[21:55] <nigelvh> Rather, the internet alone is a poor tool. Internet + Brain is an excellent tool.
[21:55] <Lunar_Lander> I just want to make sure to understand it
[21:55] <daveake> I'll reprhase: Lunar, you're very capable of figuring this stuff out for yourself
[21:56] <daveake> Maybe you need a bit more confidence that that is the case?
[21:56] <Lunar_Lander> yea maybe
[21:56] <daveake> :)
[21:56] <daveake> That's the attitude :)
[21:56] <Lunar_Lander> :)
[21:56] <Lunar_Lander> sometimes I struggle to find the start though
[21:56] <Lunar_Lander> that is my problem I think
[21:56] <nigelvh> Mostly it just comes with practice.
[21:56] <Lunar_Lander> yea
[21:57] <nigelvh> I couldn't tell you how many things i've screwed up, or busted, or released the magic blue smoke from, or simply just didn't get the results I wanted.
[21:57] <Lunar_Lander> yea
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[21:57] <daveake> It's OK, I was staring at circuit diagrams when I was 10, wondering WTF was going on
[21:57] <Lunar_Lander> yea
[21:57] <daveake> Lots of smoke and sparks and melted components since then
[21:57] <Lunar_Lander> yea
[21:58] <Lunar_Lander> so far I destroyed a LED and a MOSFET
[21:58] <daveake> That's nothing
[21:58] <Lunar_Lander> and damaged a voltage regulator
[21:58] <nigelvh> I did similarly. The gal at the local radio shack would save broken VCR recorders and whatnot people would bring in. And then I'd take them apart.
[21:58] <daveake> I once built a circuit on vero ...
[21:58] <daveake> ... some processor stuff one side ...
[21:58] <daveake> ... and a power reg etc the other side ...
[21:58] <daveake> ... and I cut all the tracks between components ...
[21:59] <daveake> ... except the tracks between one side and the other ..
[21:59] <Lunar_Lander> ohhhh
[21:59] <daveake> That board chained on to another
[21:59] <daveake> Everything was destroyed
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[21:59] <daveake> And I'd spent MONTHS on it
[21:59] <Lunar_Lander> oh
[21:59] <Lunar_Lander> like this: https://www.youtube.com/watch?v=F-efQbRVZrs ?
[21:59] <daveake> So now, when you blow an LED, laugh at me :D
[22:01] <nigelvh> I've done nearly exactly that. Though it was an ancient computer and monitor. Had them both plugged into wall power, and went to plug in the monitor cable to the computer and it decided to arc weld the DB25 off.
[22:02] <Lunar_Lander> oh
[22:03] <nigelvh> Needless to say it scared the s*%^ out of me.
[22:03] <nigelvh> So, I scrapped that computer and built a trebuchet instead.
[22:03] <daveake> lol
[22:04] <Lunar_Lander> XD
[22:04] <Lunar_Lander> one more stupid question
[22:04] <Lunar_Lander> what exactly do you mean with the resistor load?
[22:04] <daveake> It's a resistor
[22:04] <nigelvh> Connected to ground.
[22:05] <Lunar_Lander> from the output?
[22:05] <daveake> So it's "loading" the output
[22:05] <daveake> yes
[22:05] <Lunar_Lander> like a pulldown?
[22:05] <daveake> yes
[22:05] <Lunar_Lander> ah
[22:05] <Lunar_Lander> thanks
[22:05] <daveake> The output impedance of your device forms a potential divider (you know about those) with the resistor
[22:05] <Lunar_Lander> yea
[22:06] <daveake> So with the maths you've done before, you can calculate the impedance by measuring the voltage before and after you add the load resistor
[22:06] <nigelvh> (Assuming the voltage isn't zero or the same as before when you add the resistor)
[22:06] <Lunar_Lander> yea
[22:06] <daveake> So if the datasheet doesn't tell you (like you said) you can measure it, indirectly
[22:07] <daveake> yup
[22:07] <Lunar_Lander> thanks
[22:07] <daveake> A good rule of thumb would be to measure the voltage without a load, then add different resistors till the voltage drops to about half
[22:08] <Lunar_Lander> OK
[22:08] <nigelvh> Alright, time to go home. Chat with you guys later. Congrats daveake and good luck Lunar_Lander.
[22:09] <daveake> ta :)
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[22:09] <griffonbot> Received email: Martin Bud "RE: [UKHAS] Rockets?!"
[22:09] <Lunar_Lander> XD!
[22:09] <Lunar_Lander> btw I went back to the roots
[22:10] <Lunar_Lander> I said how my cell phone did not start anymore
[22:10] <Lunar_Lander> now I got a Nokia 3310
[22:15] <Lunar_Lander> :)
[22:16] <Lunar_Lander> btw daveake I think you wondered what a "stupidiest champion" is, right?
[22:18] <Lunar_Lander> at 1:28 https://www.youtube.com/watch?v=5Dg0GTLUHZw&feature=related
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[00:00] --- Thu Jul 19 2012