highaltitude.log.20120710

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[00:30] <shortcircuit1> Can anyone suggest a good cost effective hand-held or Auto transceiver (and where to purchase) for RTTY communication with a balloon?
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[03:41] <KT5TK_QRL1> @shortcircuit1 The clasics are the Yaesu FT817 or FT857 seies. You probably don't get a decent new transceiver below that price. An Icom IC706MKIIG is probably more expensive already. Kenwood has the TH-F7E handheld that can do VHF/UHF ssb. For receive-only scanners and older models you may try the RigReference advanced search: http://rigreference.com/search/advanced
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[03:52] <zamabe> KT5TK_QRL1, I own a TH-F7E. They're receive only on ssb.
[03:56] <KT5TK_QRL1> Correct, but that's what shortcircuit1 wants. Track a balloon that transmits rtty.
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[05:54] <Upu> morning
[05:54] <Upu> is there a launch today or is it tomorrow ?
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[06:34] <fsphil> I think steve's launching, depending on the weather
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[06:47] <UpuWork> ok I left the radio on in case
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[07:06] <nosebleed_> yo all !
[07:16] <fsphil> morning nosebleed_
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[07:54] <Laurenceb_> so i worked out the secret of skylon
[07:55] <Laurenceb_> but ill spare eroomde and wont spill the beans
[07:55] <Laurenceb_> but he already told us how it works
[07:56] <UpuWork> "big rockets" ?
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[07:57] <Laurenceb_> the antifrost
[07:57] <Laurenceb_> it is quite cunning
[07:57] <Laurenceb_> but i only worked it out because eroode gave too much away :P
[07:58] <Laurenceb_> cya
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[09:16] <costyn_> I was wondering what thickness EPS is common to use for the payload? I'm using some packaging which has 1 - 1.5cm walls, now I'm wondering if I should glue another layer onto the outside, or that it's not going to make much difference anyways?
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[09:18] <Randomskk> meh
[09:18] <Randomskk> probably won't make much difference
[09:19] <Randomskk> you could if you want. we use maybe 2cm or 1" thick stuff I guess
[09:19] <UpuWork> I use 15mm
[09:19] <daveake> I select the thickness more for the strength, and that depends if it's the white lightweight beady stuff or the pink of blue strong stuff
[09:22] <costyn_> the stuff I have seems pretty sturdy
[09:22] <costyn_> i have some insulation plates as well but they're very porous and don't seem very strong
[09:22] <costyn_> ok, well I guess I'll just leave it as it is then
[09:23] <daveake> If it seems string enough, yes should be fine
[09:25] <costyn_> http://i.imgur.com/TEB7Hh.jpg right side wall still needs some work done
[09:25] <costyn_> http://i.imgur.com/diAZ0h.jpg my groundplane is large enough right?
[09:26] <UpuWork> 164mm long ?
[09:27] <UpuWork> 70cms ?
[09:27] <UpuWork> 434Mhz ?
[09:28] <costyn_> UpuWork: the actual antenna is 16.4 long yes
[09:28] <costyn_> UpuWork: gonna put in a small fiberglass rod to keep it straight, but that's one of the last things as it makes it hard to put it down anywhere :)
[09:30] <gonzo_> is fibreglass is a bit hard to be pointing down?? I used a drinking straw one mine
[09:32] <costyn_> i had it lying around, seemed perfect for the job
[09:32] <UpuWork> try avoid anything that could cause damage
[09:32] <UpuWork> drinking straw is about as spikey as I'd use
[09:34] <costyn_> hmmm ok
[09:36] <daveake> costyn_ FYI that is the low-density packaging foam. This is the high density stuff used for insulation in buildings - http://i.imgur.com/Llvw1.jpg
[09:36] <daveake> I've used both but I find the latter easier to work with
[09:37] <daveake> And as UpuWork and I found out when his payload survived both of us trying to pull it out of a tree, it can be very very strong
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[09:48] <Laurenceb> is that a raspberry pi?
[09:49] <daveake> yup
[09:49] <costyn_> daveake: ah ok. good to know... I don't think I'm going to change it now... but I'll use that high density stuff next time
[09:50] <costyn_> daveake: what kind of glue do you use?
[09:50] <daveake> UHU EPS glue
[09:50] <UpuWork> Uhu Por
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[09:50] <daveake> Almost an anagram ^^
[09:50] <costyn_> thx
[09:51] <daveake> This stuff --> http://www.ebay.co.uk/itm/UHU-POR-Depron-Glue-40g-50ml-2-x-Exp-Polystyrene-Glue-/260473715453?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item3ca5717afd#ht_1158wt_895
[09:51] <daveake> Hot-melt works too
[09:51] <UpuWork> thats the stuff
[09:53] <costyn_> I've been using bison polymax express, it'll glue anything to anything
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[09:54] <costyn_> although now I see it's rated to -40 ; ah well, too late
[09:54] <costyn_> although i've not used in any structural places
[09:54] <costyn_> the container is 1 piece EPS
[09:57] <costyn_> apparently it's a Dutch brand
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[10:12] <costyn_> daveake: the pink stuff is called XPS right?
[10:13] <daveake> Believe so
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[10:24] <kokey> I didn't realise an iphone 4 has so many screws
[10:25] <kokey> like over 25 of them
[10:27] <costyn_> kokey: what are you fixing? my home button is wonky, but the replacement instructions on ifixit look pretty daunting
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[10:28] <kokey> costyn_: I got my hands on two iphone 4 phones, one with a smashed screen and one with water damage
[10:28] <kokey> I'm in the process of moving the water damage screen to replace the smashed screen
[10:28] <kokey> well, it's not that bad actually, just a _lot_ of screws, to keep track of
[10:28] <fsphil> don't microwave it
[10:29] <kokey> but everything pulls apart fairly easily, much easier than a laptop
[10:29] <kokey> the problem with putting it back together is that most of the screws are very short so you have to use magnetic drivers of blue tack or something
[10:30] <kokey> anyway, so I think some of the parts from the water damage one might still work
[10:31] <kokey> like the main camera
[10:31] <costyn_> good to know
[10:31] <kokey> seems like I found some pinouts for it... http://imageshack.us/photo/my-images/219/picture6om.png/
[10:31] <kokey> costyn_: I got one of those cheapie toolsets for under £2 off ebay
[10:31] <nosebleed_> my mission is officially aborted. There are no laws for such things here
[10:31] <kokey> nosebleed_: your mission was to break a law that doesn't exist?
[10:31] <costyn_> kokey: cool.. yea they have the toolsets on ifixit, but they are a bit pricey for 1 repair job
[10:32] <fsphil> if there are no laws, can't you just launch anyway?
[10:32] <fsphil> ask your met office, they probably do launches
[10:32] <nosebleed_> I'm seriously thinking of giving my capsule balloon and stuff to someone out there and flight it for me
[10:32] <nosebleed_> and pay for the helium of course
[10:33] <nosebleed_> so fsphil are you in ? lol
[10:33] <kokey> nosebleed_: what's the issue?
[10:33] <Darkside> nosebleed_: mail it here lol
[10:34] <nosebleed_> Darkside: where r u?
[10:34] <Darkside> australia
[10:34] <Darkside> :P
[10:34] <nosebleed_> loool
[10:34] <fsphil> the long path
[10:35] <nosebleed_> kokey: im ready to fly next saturdays but the CAA told me they dont have laws so they cant get NOTAM
[10:35] Action: SpeedEvil is amused by the concept of a CAA operating beyond the law.
[10:36] <SpeedEvil> nosebleed_: Where are you?
[10:36] <kokey> nosebleed_: which country?
[10:37] <nosebleed_> well
[10:37] <nosebleed_> its called greece
[10:37] <nosebleed_> causes problems lately
[10:37] <costyn_> heheh
[10:37] <daveake> Perhaps the Germans can send you a NOTAM
[10:37] <kokey> ah, just launch it off shore from a boat
[10:38] <nosebleed_> yeah along with their money and new laws :)
[10:38] <SpeedEvil> I would normally have made a comment about 'I'm sure inflation isn't a problem in greece' - but a country without fiscal control of its currency cannot inflate it, even when it would like to.
[10:38] <daveake> :D
[10:38] <kokey> yeah the problem is deflation really
[10:38] <SpeedEvil> So my witty rejoinder is halted by teh soulless minions of orthodoxy.
[10:38] <daveake> lol
[10:38] <nosebleed_> lo
[10:38] <nosebleed_> l
[10:39] <nosebleed_> So who is willing to fly my thing?
[10:39] <nosebleed_> :P
[10:39] <nosebleed_> all expenses will be paid
[10:39] <nosebleed_> :)
[10:39] <kokey> personally, when I was living in Gibraltar, I would have drive across to spain, made sure I was more than 5km from an airport, and launch without permission
[10:39] <daveake> Well you could send the payload to someone as a gift ....
[10:39] <daveake> (you can make up your own jokes for that one)
[10:40] <nosebleed_> im thinking of putting some TNT inside it and send it to the Athenian CAA
[10:40] <Randomskk> I would advise not doing that
[10:40] <nosebleed_> its in fashion nowdays here :)
[10:41] <kokey> the greek caa probably thinks this notam thing is 'work' so it's not something they would want to do
[10:41] <nosebleed_> no man we just dont have to put it under some law and approve the NOTAM
[10:42] <fsphil> sounds like you don't need a notam
[10:42] <kokey> yeah it's not like they can prosecute you based on, uhm, no law
[10:43] <kokey> in Spain I would have done it without permission, I can't think Greece is much stricter
[10:43] <nosebleed_> yeah, actually this is cool
[10:43] <fsphil> ask them if it's ok if you launch anyway, after notifying them say 24 hours before
[10:43] <nosebleed_> hmm
[10:43] <fsphil> that's how it works in the US I believe
[10:44] <fsphil> (but don't quote me on that)
[10:44] <nosebleed_> xaxaxa
[10:44] <kokey> and I thought jejeje was a funny way to laugh
[10:46] <nosebleed_> hehehe ?>
[10:48] <nosebleed_> now I have 9m^3 of helium
[10:48] <nosebleed_> to spare
[10:50] <kokey> nice
[10:51] <gonzo_> start talking about flying TNT and you'll have an orange jump-suit on it's way to you....
[10:51] <gonzo_> given the overreaction of the authorities these days
[10:52] <nosebleed_> im thinking of going to the sea
[10:52] <nosebleed_> you know that place where everybody can go
[10:53] <nosebleed_> and do things :)
[10:54] <gonzo_> surely the meterological office there must send up sondes, so balloon's are known about?
[10:54] <kokey> yeah, just do it off shore
[10:54] <nosebleed_> whatever
[10:54] <nosebleed_> this country causes lots of problems
[10:55] <daveake> Beware of Greek seafaring lifts
[10:55] <daveake> or something like that
[10:55] <nosebleed_> :p
[10:56] <gonzo_> a long crooked stick comes from stage left towards dave's neck
[10:56] <daveake> <yoik>
[10:57] <SpeedEvil> That's no stick!
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[11:01] <gonzo_> was quite clever though dave
[11:01] <fsphil> gets 2.8 hab points
[11:02] <SpeedEvil> Though note that an award of hab points is a bad thing, as points burst balloons.
[11:02] <fsphil> these are all rounded numbers
[11:04] <Randomskk> I dunno, they sound pretty rough
[11:05] <daveake> I have an irrational fear of that
[11:05] <fsphil> they look quite complex but to be honest, half of them are imaginary
[11:06] <daveake> I'm always looking for negatives
[11:06] <fsphil> oh what's the point
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[11:07] <fsphil> why do we have to be so divided
[11:07] <daveake> This group should be in its prime
[11:08] <DanielRichman> UpuWork: is there an easy trick to disassemble this rtl-sdr thing, or should I just be hitting it harder with the hammer?
[11:08] <M0JSN> DanielRichman: is it an ezcap668?
[11:08] <DanielRichman> yeah
[11:09] <M0JSN> fingernail in the gap along one side
[11:09] <daveake> Mine just popped apart with a fingernail in the gap between the 2 halves
[11:09] <fsphil> yea, run your fingernail along the edge
[11:09] <M0JSN> or other similarly shaped object
[11:09] <fsphil> I figured that out after breaking the clips...
[11:09] <DanielRichman> okay cool.
[11:10] <fsphil> nice of evolution to think ahead like that
[11:10] <Randomskk> screwdrivers
[11:10] <DanielRichman> ^^ my first thought but it wasn't sharp enough
[11:10] <Randomskk> I should open mine sometime
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[11:10] <fsphil> seems my first one has the protection diode
[11:10] <Randomskk> I think I even have some of those parts at home
[11:10] <M0JSN> see if it has ESD
[11:11] <Randomskk> BAV66something?
[11:11] <M0JSN> 99
[11:11] <Randomskk> or something like that
[11:11] <Randomskk> close enough
[11:11] <M0JSN> only 180 degrees out
[11:11] <Randomskk> used them for a thing once maybe
[11:11] <fsphil> he's got 99 problems but ESD protection isn't one
[11:11] <daveake> 66 is for negative ESD
[11:12] <Randomskk> the worst kind
[11:17] <DanielRichman> success
[11:17] <DanielRichman> woo it's got the esd stuff
[11:17] <daveake> :)
[11:17] <daveake> result
[11:19] <DanielRichman> ok, thanks. Question: Is the 75Ohm/50Ohm thing an issue at all for receiving with this thing or does it not really matter?
[11:20] <BrainDamage> now rub a cat on the antenna
[11:20] <Darkside> DanielRichman: doesn't matter much
[11:21] <Darkside> DanielRichman: i'd just remove the PAL socket and put a sma socket on
[11:21] <Darkside> since all your other gear will be 50 ohm anywa
[11:22] <DanielRichman> ok :)
[11:22] <DanielRichman> this thing game in a box with a linux logo on it and a CD with an open source driver
[11:23] <DanielRichman> which I believe is in the kernel anyway now (?)
[11:23] <DanielRichman> but I was suprised anyway
[11:23] <Randomskk> I was happily surprised by that too
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[11:55] <fsphil> not sure many people use them for dvb-t anyway :)
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[11:56] <daveake> I use mine for DAB during the day :)
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[12:12] <SpeedEvil> Does it work for DAB on linux?
[12:12] <SpeedEvil> oh!
[12:13] <SpeedEvil> I have been meaning to do something with my big DAB radio, to make it internetty too
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[12:16] <daveake> I had a Psion wavefinder. This is much more sensitive.
[12:16] <daveake> No idea about Linux - this is on Windows. My Linux machines are servers.
[12:17] <SpeedEvil> daveake: Psion wavefinder, in addition to being unobtainable, uses comical amounts of power.
[12:18] <f5ct> what is frequency XABEN pse ?
[12:18] <daveake> This was ages ago, and PCWeld were selling them off for £10 :)
[12:18] <SpeedEvil> Oh - can someone do lsusb -v |awk '/MaxPower/;/id[VP]/'
[12:18] <SpeedEvil> and find out what the MaxPower of these dongles is.
[12:19] <SpeedEvil> Even more ideally measure one, but that's going a bit far as an ask :)
[12:20] <fsphil> there's been no news on xaben
[12:20] <fsphil> although it's on spacenear.us at 24km
[12:21] <fsphil> 21.5km even
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[12:21] Nick change: jonsowman_ -> M0JSN
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[12:25] <fsphil> f5ct: approx. 434.075MHz
[12:25] <fsphil> ah I see you've found it already
[12:26] <daveake> Got it
[12:27] <daveake> Thought he wasn't bothering as there was no peep from him
[12:27] <fsphil> same here
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[12:31] <WillDuckworth> yeah - he does keep a little quiet at times
[12:42] <DanielRichman> gnuradio working, win
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[12:42] <SpeedEvil> http://what-if.xkcd.com/1/
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[12:50] <daveake> Afternoon RB
[12:50] <RocketBoy_S2> Yo
[12:51] <RocketBoy_S2> Hows my flight going
[12:51] <daveake> Just over 31km
[12:51] <daveake> Nice clean signal
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[12:51] <RocketBoy_S2> Thrt have taken my laptop away:-(
[12:51] <daveake> ??!!:(
[12:53] <RocketBoy_S2> Cool
[12:53] <UpuWork> got it
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[12:53] <daveake> "VClosed" popped up in the telemetry
[12:53] <daveake> And you're coming down
[12:53] <UpuWork> Wales ?
[12:53] <daveake> Max 31495
[12:54] <daveake> Signals's a bit wiggly but still good
[12:54] <daveake> "HeaterOff" too btw
[12:56] <RocketBoy_S2> No probs - just some valve servo heating code
[12:56] <RocketBoy_S2> No servo on this flight
[12:56] <daveake> yeah, just thought it might be interesting
[12:57] <RocketBoy_S2> Yeah confusing i know
[12:57] <RocketBoy_S2> Bbl
[12:58] <fsphil> it's heading for llwwvvtabviwwn
[12:59] <daveake> If it doesn't Llanfairpwllgwyngyllgogerychwgogogoffcourse
[12:59] <Randomskk> itym llwlaeullyeuuaiiy
[13:00] <daveake> Well it gave me a brief chance to test my base proggie on a live flight - http://i.imgur.com/yzQRg.png
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[13:00] <fsphil> hehe, table
[13:01] <daveake> :)
[13:01] <fsphil> looking well
[13:01] <Randomskk> daveake: that's cool
[13:01] <Randomskk> what's it getting data from, the local radio or..?
[13:01] <daveake> Still adding to it
[13:01] <daveake> Both
[13:01] <daveake> status bar bottom-right
[13:01] <Randomskk> what's 1/2/3?
[13:02] <daveake> Shows sources 1-3 = up to 3 copies of dl-fldigi (cos I have 3 receivers)
[13:02] <daveake> H - Habitat
[13:02] <Randomskk> aah cool
[13:02] <daveake> I set each copy to use a different port so I can connect to each
[13:02] <Randomskk> what's it do if they disagree? :P
[13:02] <Randomskk> three sound inputs on the computer?
[13:02] <daveake> 1 sound 1 FCD 1 EZCAP
[13:02] <Randomskk> aah
[13:02] <Randomskk> yea
[13:02] <Randomskk> nice
[13:02] <daveake> Latter 2 are VLC sound devices
[13:03] <daveake> VAC
[13:03] <Randomskk> nice
[13:03] <Randomskk> cool setup
[13:03] <Randomskk> now automate it to listen to three airborne radios at once :P
[13:03] <daveake> It's getting better :D
[13:04] <daveake> It can have up to 8 airborne trackers, but only 1 per dl-fldigi
[13:04] <Randomskk> what it should do is read the habitat list of upcoming flights and autoconfigure the radios to search for payloads
[13:04] <Randomskk> and then you just leave it alone
[13:05] <Randomskk> in theory
[13:05] <fsphil> I'm not sure about mixing dl-fldigi and habitat in habhound
[13:05] <Randomskk> ...
[13:05] <daveake> :D
[13:05] <fsphil> dl-fldigi directly would be far more useful for chase-car work
[13:05] <daveake> I do both in my chase car app
[13:06] <fsphil> the way it's setup at the moment, if they've the same name it should just work
[13:06] <fsphil> but I've not tried it
[13:06] <daveake> It's handy to have the Habitat data if you're chasing 2 payloads, for example
[13:06] <fsphil> good point
[13:07] <daveake> Also you could be just the wrong side of a hill (happened on one of my flights - I lost the signal but one person still had it)
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[13:27] <DanielRichman> hmm. What kind of cpu usage are people seeing with rtlsdr/gnuradio (I tried 'multimode.py'; 100% one core - is this normal?)
[13:28] <M0JSN> yeah multimode keeps 3-4 of my cores at about 25%
[13:28] <UpuWork> depends
[13:28] <DanielRichman> ah, ok. Have you tried any of the other options?
[13:29] <UpuWork> 100% on a P4 3Ghz
[13:29] <UpuWork> 75 on a i7 something
[13:29] <UpuWork> 7%
[13:29] <M0JSN> as in any other gnuradio flowgraphs/
[13:29] <M0JSN> ?
[13:30] <DanielRichman> yeah; or.., well, have you kept multimode.py or do you normally use something else
[13:31] <M0JSN> i have a slightly modified version for rtty
[13:31] <M0JSN> http://hexoc.com/u/rtl-rtty.tar
[13:31] <DanielRichman> UpuWork: ok, seems consistent with what I was seeing
[13:31] <UpuWork> thats under windows with sdr-sharp
[13:32] <navrac_> very delphi tms controls looking
[13:33] <navrac_> oops - ghallf an hour late with that comment
[13:34] <fsphil> gqrx is a bit more cpu friendly, but not much
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[13:35] <daveake> navrac_ Yep
[13:36] <daveake> Not a coincidence :)
[13:36] <navrac_> I've got a few apps that look like that - the tms stuff doesnt half put a strain on the graphics though
[13:36] <lloyd_> Hi there, I'm looking into high altitude balloons for a possible future university project. I was wondering how I go about obtaining permission from the CAA, and also how much would it cost for permission?
[13:36] <navrac_> pray & free
[13:36] <DanielRichman> M0JSN: works perfectly, thanks :-)
[13:36] <daveake> Send the application and £100 to me; I'll get it sorted :p
[13:37] <nick_> lloyd_: which uni?
[13:37] <M0JSN> no prob
[13:37] <lloyd_> Free? On the CAA website I see mention of paying for certificate...
[13:37] <lloyd_> Huddersfield
[13:37] <daveake> It's free
[13:37] <lloyd_> So I can just launch one?
[13:37] <nick_> What are you going to launch?
[13:38] <daveake> http://ukhas.org.uk/guides:faq#do_i_need_to_get_permission_to_launch_a_weather_balloon_in_the_uk
[13:38] <daveake> No you have to apply for and obtain permission, but this is issued FOC
[13:38] <fsphil> with variable amount of waiting
[13:39] <lloyd_> Thanks for the link, thats an interesting read
[13:40] <daveake> Lots of useful info on the site
[13:40] <daveake> What are you planning to launch?
[13:40] <lloyd_> A balloon
[13:40] <daveake> Thanks
[13:40] <daveake> Attached to ....
[13:41] <lloyd_> Well as I said i'm looking into it for a possible uni project so I'm not 100% sure yet, but I would like to attach a camera and sensors etc
[13:41] <daveake> cool. Have you thought about how to track yet?
[13:42] <nick_> What kind of project?
[13:42] <nick_> Like a final year project?
[13:42] <DanielRichman> oh cool, pulseaudio will let me shove the audio from gnuradio directly into dl-fldigi
[13:42] <lloyd_> Yes that kind of project
[13:42] <nick_> For which students?
[13:42] <lloyd_> Er
[13:42] <lloyd_> me
[13:43] <nick_> Which subject?
[13:43] <fsphil> DanielRichman: finally a good use for pulseaudio :)
[13:43] <DanielRichman> fsphil: oooo controversial
[13:44] <lloyd_> Well im not actually at uni yet, I start sept but I came across high altitude balloons and it struck me as a good project one day. I'll be studying Computer Systems Engineering/Electronics
[13:44] <fsphil> lol
[13:45] <nick_> Don't wait that long, just do it now for fun.
[13:45] <daveake> Cool, in that case you'll be wanting to make and code a radio tracker
[13:45] <fsphil> actually I don't mind pulseaudio, it was very choppy and horrible to begin with
[13:45] <fsphil> but now it's nice
[13:45] <daveake> Some info here http://ukhas.org.uk/guides:linkingarduinotontx2
[13:45] <lloyd_> Yes one of the reasons it interested me
[13:45] <daveake> and http://ukhas.org.uk/guides:tracking_guide
[13:45] <fsphil> do give gqrx a try though, it's a nice app
[13:45] <lloyd_> and also, who wouldnt want their own photos of space/earth! :-)
[13:46] <DanielRichman> fsphil: ah, looks neat
[13:46] <fsphil> works seamlessly for funcube dongle or rtl-sdr
[13:47] <lloyd_> Is anyone familiar with the sparkfun website? on their homepage theres some info about balloons, which got me interested in it
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[13:47] <nick_> Sparkfun is cool
[13:47] <nick_> I really wish we had some similar decent services here.
[13:47] <lloyd_> I buy a lot of stuff from them
[13:47] <fsphil> we have resellers :) not just as cool though, but very handy
[13:48] <lloyd_> I don't know of many other places to get cheap-ish breakout boards
[13:48] <nick_> Although the resellers often aren't great.
[13:48] <fsphil> they're not as fun
[13:48] <fsphil> I do buy a fair amount from proto-pic
[13:48] <daveake> me too
[13:48] <nick_> They usually don't carry a lot of the stuff I want
[13:48] <fsphil> but a big order is often cheaper from sparkfun direct
[13:48] <nick_> It's not price I'm worried about so much as time.
[13:49] <nick_> Stuff coming over from America can take quite a while.
[13:49] <lloyd_> Hmm, I find for cheap orders of bulk items (e.g. a ton of resistors) CPC are pretty good
[13:49] <fsphil> I'm always late with my projects anyway so that don't bovver me :)
[13:49] <fsphil> yea, cpc for components (or farnell)
[13:49] <nick_> I get impatient when I'm doing something fun.
[13:49] <fsphil> (techincally the same)
[13:49] <fsphil> (sorta)
[13:50] <lloyd_> True, but Farnell don't sell things such as motherboards
[13:50] <lloyd_> apart form that theres not much difference
[13:50] <nick_> "Cool, I'll just add this component as an easy break out board"
[13:50] <fsphil> I ordered about 2000 resistors of cpc once
[13:50] <nick_> Oh, I'll have to wait a couple of weeks
[13:50] <nick_> I buy my components from RS
[13:50] <lloyd_> RS?
[13:51] <fsphil> fast but expensive
[13:51] <nick_> http://uk.rs-online.com/web/
[13:51] <lloyd_> Never heard of them
[13:51] <nick_> How much more expensive are they?
[13:51] <nick_> I get a decent discount there
[13:51] <fsphil> our engineer in the factory orders from RS because he always needs the parts quickly
[13:51] <fsphil> I usually find they're about 10/20% more expensive
[13:51] <cuddykid> had a nice delivery just - lots of lithiums!
[13:51] <nick_> Really?
[13:51] <nick_> That wipes out most of my discount
[13:51] <fsphil> any time I've looked at them anyway
[13:52] <lloyd_> What is the general advice for stopping the systems in the payload freezing up? I saw someone who used a big resistor to warm the insulated box up
[13:52] <fsphil> that sometimes isn't a problem lloyd_, weirdly you might have problems keeping things cool
[13:53] <lloyd_> Oh, from sun heat?
[13:53] <cuddykid> ping WillDuckworth
[13:53] <fsphil> parts that generate heat sometimes rely on convetion to carry the heat away
[13:53] <fsphil> but there's very little air up there
[13:53] <lloyd_> I see
[13:53] <fsphil> so some parts might get very cold, others very hot
[13:53] <lloyd_> I hand't thought about heat, only cold
[13:53] <WillDuckworth> hello cuddykid
[13:54] <cuddykid> WillDuckworth: hiya - DM
[13:54] <lloyd_> fsphil: What do you use for temperature control?
[13:56] <fsphil> a pretty thick polystyrene box, with the compartments being just big enough to hold the boards/parts
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[13:56] <lloyd_> And is that enough to stop the innards getting too cold or hot?
[13:56] <fsphil> this polystyrene is for home insulation
[13:57] <fsphil> it seems to, although I've not measured it directly yet
[13:57] <lloyd_> I imagine that to be expensive?
[13:57] <fsphil> I'm using leftovers from an extension
[13:57] <lloyd_> Good thinking
[13:59] <navrac_> you can buy sheets or boxes or spheres or cones of polysyrene online easily enough
[13:59] <lloyd_> Yeah, I bet ebay has tons of it
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[14:00] <SpeedEvil> I've recently bought a 2m cube of foam.
[14:00] <SpeedEvil> (not admittedly in that form)
[14:01] <cuddykid> http://i.imgur.com/0J6vW.jpg
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[14:01] <lloyd_> Nice batteries
[14:01] <SpeedEvil> Neat
[14:02] <navrac_> i only use AAA's
[14:02] <navrac_> did you get a good price?
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[14:02] <cuddykid> energiser sponsored :)
[14:02] <navrac_> I had to run to waitrose on sunday to get lithium AAA's - £7 for 4]
[14:03] <lloyd_> Oh thats something else I was going to ask. I assume the temperatures up there could really mess up the battery chemistry. Any advice for what types of batteries to use etc?
[14:03] <cuddykid> that's good
[14:03] <SpeedEvil> Lithium AAs are good.
[14:03] <cuddykid> lloyd_: lithiums
[14:03] <navrac_> I normalkly pay 4.50 inc delivery
[14:03] <SpeedEvil> For AA?
[14:03] <navrac_> yep energiser lithiums work best at low temps
[14:03] Action: Laurenceb worked out how the skylon frost system works
[14:03] <navrac_> aaa
[14:04] <Laurenceb> eroomde gave out too much info
[14:04] <navrac_> quick lets patent it
[14:04] <Laurenceb> heh
[14:05] <SpeedEvil> Laurenceb: Does it use the power of the Penguin from batman?
[14:05] <Laurenceb> no, the clues are in photos eroomde has posted
[14:06] Action: SpeedEvil hopes that Reaction engines gets something flying 'soon'.
[14:06] <lloyd_> Whats reaction engines?
[14:07] <SpeedEvil> What was skylon.
[14:07] <lloyd_> I dont know
[14:07] <SpeedEvil> A small airbreathing rocket company.
[14:07] <SpeedEvil> Well - rocket/jet type thingy
[14:07] <lloyd_> Oh cool, I'm in wikipedia looking at them now
[14:08] <lloyd_> Horizontal landing? wow
[14:08] <lloyd_> Oh wait dm I got confused
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[14:11] <fsphil> xaben should be down by now, tracked to 3km. not bad
[14:11] <lloyd_> xaben?
[14:11] <fsphil> was a balloon launched this-morning
[14:11] <fsphil> http://spacenear.us/tracker/
[14:12] <fsphil> ooh have you seen the live tracker yet?
[14:12] <lloyd_> Good grief you've got a long drive to pick it up
[14:12] <fsphil> the person who launched it is nearby
[14:13] <fsphil> that long line from england was just a test, it was actually launched in wales
[14:13] <lloyd_> How do yuo predict where they will land?
[14:13] <lloyd_> you*
[14:13] <fsphil> the site can do live predictions, although that wasn't enabled for this flight
[14:14] <lloyd_> How does the site predict where it will land?
[14:14] <SpeedEvil> http://www.youtube.com/watch?v=Slp7NJsWXDg
[14:14] <Randomskk> http://habhub.org/predict
[14:14] <Randomskk> ^ uses that predictor
[14:14] <WillDuckworth> hey lloyd_ it may be worth having a look through the UKHAS wiki site and reading up: http://www.ukhas.org.uk/
[14:14] <fsphil> there is also the predictor at http://habhub.org/predict/
[14:15] <fsphil> oh, echo :)
[14:15] <lloyd_> Yeah I have been thanks, it's how I came across this IRC channel
[14:15] <lloyd_> That predictor looks pretty useful, thanks for the link
[14:15] <fsphil> it uses predicted wind data from the american met office NOAA
[14:16] <lloyd_> Thats good
[14:16] <UpuWork> https://www.dropbox.com/s/m5w21hwi6jkzy3t/2012-07-10%2015.02.02.jpg?m
[14:16] <UpuWork> now with 100% more antistatic protection
[14:17] <fsphil> nice job
[14:17] <navrac_> nicely done
[14:17] <fsphil> does it still work? :)
[14:17] <daveake> :D
[14:17] <UpuWork> I'll tell you tonight
[14:17] <navrac_> still cant get mine to work
[14:17] <UpuWork> you 3 have some diodes in the post
[14:17] <navrac_> thanks!
[14:18] <daveake> Excelltn
[14:18] <daveake> I shall rectify my ezcap forthwith
[14:18] <fsphil> they only stopped putting the diodes in recently
[14:18] <lloyd_> What is the board? One of those USB TV receivers you can use for radio if you do a bit of modification?
[14:18] <UpuWork> yeah its just an EZCAP
[14:18] <fsphil> indeed, infact they don't even need to be modified
[14:18] <daveake> Unless you want them to stay working
[14:18] <UpuWork> i modded a new one too
[14:18] <fsphil> true, some of them are missing a safety component
[14:18] <UpuWork> https://www.dropbox.com/s/scyju0hnmvtzeh8/2012-07-10%2015.12.08.jpg
[14:19] <lloyd_> I was looking at GNURadio a few days ago actualy
[14:20] <fsphil> I find gnuradio both confusing and amazing at the same time
[14:21] <lloyd_> Haven't tried it yet
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[14:22] <lloyd_> What sort of devices do you normally send up then? I've mostly seen GPS, Radios, and cameras used
[14:22] <jcoxon> afternoon all
[14:23] <fsphil> hullo jcoxon
[14:23] <lloyd_> Hi
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[14:28] <navrac_> hi jcoxon
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[14:32] <jcoxon> hey
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[14:43] Action: jcoxon needs a project for the next 2 days
[14:43] <kokey> wow I wish I could say that
[14:44] <craag> me too
[14:44] <fsphil> solar power :)
[14:44] <SpeedEvil> jcoxon: Solving the halting problem?
[14:45] <jcoxon> solar panel with this cloud...
[14:45] <fsphil> I'm gonna be building my pico payload, although I don't expect it to launch this week
[14:46] <fsphil> perfect testing conditions :)
[14:46] <navrac_> ok you can fix the weather for me so i can launch
[14:46] Action: nick_ should ask about stealing some small solar panels my supervisor used by mistake
[14:47] <navrac_> dont forget to right it up in the wiki under 'how to change the weather for good flying conditions'
[14:47] <navrac_> write it up even
[14:48] <jcoxon> hehe
[14:48] <SpeedEvil> I have a design for that.
[14:48] <SpeedEvil> It involves three lenses, and an addressible array of mirrors.
[14:48] <SpeedEvil> The primary lens is about 8000km across IIRC
[14:50] <fsphil> did they do that on Futurama? :)
[14:51] <fsphil> didn't*
[14:53] <jcoxon> okayi
[14:54] <jcoxon> i'm going to build a dedicated rtl-sdr pc
[14:54] <SpeedEvil> jcoxon: Pi!
[14:54] <navrac_> funnily enough thats what im doing at the moment
[14:54] <jcoxon> SpeedEvil, need more speed
[14:54] <daveake> more speed less evil
[14:54] <navrac_> as soon as i can stop the audio coming back over the remote desktop connection
[14:55] <kokey> jcoxon: ah that's a good plan, I'm curious as to what minimum spec to get away with
[14:55] <jcoxon> navrac_, what code are you using?
[14:55] <kokey> I'm actually planning to buy a second hand desktop for that same purpose
[14:55] <jcoxon> as in which remote desktop server software?
[14:56] <fsphil> the rpi can probably *just* run dl-fldigi
[14:57] <fsphil> I doubt it could do sdr at the same time
[14:57] <navrac_> just the built in windows rdp
[14:57] <fsphil> you have to tell it to leave sound at the remote pc
[14:57] <fsphil> it's under "Local Resources"
[14:57] <kokey> I've been pondering writing my own rtty receiver with rtl-sdr
[14:58] <navrac_> I know - quite handy though at the moment for testing it works
[14:58] <fsphil> ooh
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[14:58] <jcoxon> i'm trying to decide whether to go for mini-itx
[14:58] <fsphil> I'm working on an rtty demodulator, although it's proving to be tricky
[14:58] <jcoxon> or to actually go big and use my empty apple G5 case
[14:58] <navrac_> seems a bit unsensitive though - must be the rubbish aerial that comes with it
[14:59] <navrac_> struggles on fm
[14:59] <kokey> fsphil: I suppose you've investigated ways to plug audio into fl-digi?
[14:59] <fsphil> from the sdr kokey? pulseaudio does that
[14:59] <kokey> I've had a quick look at the fl-digi code, and it might not be that hard to write a dummy interface for it
[14:59] <fsphil> at the moment I'm trying to replace the fldigi rtty modem
[15:00] <kokey> ah, yeah, that's also what I would have liked to look into
[15:00] <fsphil> but it's new territory for me, slow going
[15:01] <kokey> actually doing it directly on the rtl outpout instead of using 'sound' should in theory allow you to make it more efficient with rtty
[15:01] <fsphil> indeed
[15:01] <fsphil> adding it to gqrx would be fun
[15:02] <fsphil> it uses gnuradio in the background so there's a load of functions available
[15:02] <kokey> ah ok
[15:02] <kokey> personally I would like to make something fast and portable to multiple OSes
[15:02] <fsphil> something that could be run headerless too, so it might just work on the rpi
[15:02] <fsphil> gnuradio is portable
[15:03] <kokey> yeah, but something small that can run on the rpi for example
[15:03] <fsphil> yea
[15:03] <fsphil> I've got gnuradio compiled for the pi, but I'm unable to run it yet
[15:03] <kokey> I should look into gqrx
[15:03] <fsphil> having power problems with the USB sockets
[15:03] <fsphil> everytime i plug something in, the keyboard and mouse stop working
[15:04] <kokey> i've had pain with gnuradio on my macbook, mainly speed
[15:04] <daveake> Fuses
[15:04] <fsphil> yep, those fuses are probably going to go
[15:04] <fsphil> weirdly this happens even with a powered usb hub
[15:04] <daveake> I removed one of them, for the webcam (50-250mA)
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[15:08] <Randomskk> fsphil: how are you trying to do rtty demod?
[15:09] <fsphil> I calculate the correlation between the signal and what a change from 1>0 would look like
[15:10] <fsphil> or it remaining at the same value, 1>1
[15:10] <fsphil> that's the plan anyway
[15:10] <Randomskk> rather than correlating the signal with what a 1 or a 0 would look like?
[15:10] <fsphil> yea
[15:10] <Randomskk> why?
[15:10] <Randomskk> (incidentally have you read eroomde's thing?)
[15:10] <fsphil> I read eroomde's thing but there was this annoying wooshy sound
[15:10] <Randomskk> a traditional optimal decoder for this kind of thing would generally correlate with a 1 or a 0 rather than the change
[15:11] <Randomskk> ed's thing does look at changes but does so from a slightly different perspective iirc
[15:11] <Randomskk> aiui really*
[15:11] <fsphil> I'm looking for the change as I can sycronise on that
[15:11] <Randomskk> that's reasonable
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[15:11] <Randomskk> though otherwise you could try using a PLL to extract the clock
[15:11] <fsphil> I've been reading up on PLLs
[15:11] <fsphil> I'm not sure I follow it yet
[15:12] <Randomskk> the jist is
[15:12] <Randomskk> you have a local oscillator that you can tune a little bit
[15:12] <Randomskk> and you have some source that you want to lock the local oscillator to
[15:12] <Randomskk> and you change the tuning signal to the local oscillator based on the difference between the local oscillator and the source to lock to
[15:13] <Randomskk> the details are incredibly hairy, the actual analytical maths is really awful
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[15:13] <Randomskk> but drawing one on a block diagram or saying "you could try using a PLL to extract the clock" is very easy
[15:13] <fsphil> that seems to be the theme to what I've been reading into lately :)
[15:14] <fsphil> my idea at the moment is to store the output from the correlation calculation for the last samplerate*2 samples
[15:15] <Randomskk> and then look for peaks that should indicate changes?
[15:15] <fsphil> exactly
[15:15] <Randomskk> I'll be very interested in seeing how it performs
[15:15] <fsphil> perhaps averaging it with the previous samplerate*2 samples
[15:15] <Randomskk> I once sat down with a python interpreter intending to try making a very basic rtty decoder
[15:15] <fsphil> so it doesn't go wild in noise
[15:16] <Randomskk> expecting it to be quite easy
[15:16] <Randomskk> but, well, no
[15:16] <fsphil> hehe, I expected this to be easy too
[15:16] <Randomskk> the devil is very much in the many, many details
[15:16] <Randomskk> there's a reason the one that comes with fldigi isn't very good
[15:16] <fsphil> yea
[15:16] <Randomskk> making very good ones that work in real time is very hard
[15:17] <Randomskk> and a lot of the clever ways of doing things actually require a significant amount of computation
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[15:17] <Randomskk> e.g. for yours, are you going to be blocking the input audio into sections like some number of samples long and correlating each
[15:17] <Randomskk> or doing a running correlation?
[15:17] <fsphil> it's a sliding window
[15:17] <Randomskk> computationally exciting
[15:17] <Randomskk> you should investigate doing that with an FFT instead
[15:18] <Randomskk> it's basically a convolution
[15:18] <Randomskk> maybe get a proof of concept working first and worry about optimisation later
[15:18] <fsphil> yea, I'm going to try a very simplictic form of sycronising, just to see if I get valid bits out of it
[15:19] Action: nick_ has a question for people
[15:19] <nick_> If you were going to get a data logging board what kinds of sensors would you like on board?
[15:20] <nick_> (the point of the board being to easily configure the data you're logging and optionall storing on a remote server)
[15:27] <Randomskk> temperature humidity pressure UV light radiation acceleration rate-gyro magneto GPS GPS-time
[15:27] <fsphil> I've never really had a need for a data logging board
[15:27] <Randomskk> at the least
[15:27] <Randomskk> ;P
[15:27] <nick_> It's really designed for lab use, but it could be useful for HABing too
[15:27] <fsphil> voltage, current
[15:28] <fsphil> for logging output from a PV array
[15:28] <nick_> The idea being you get the board and just write a simple text config file to tell it which pins have which kinds of inputs/outputs
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[15:29] <nick_> But I think I might put some common/tricksy sensors on board.
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[15:46] <navrac_> this weather is a joke - the only day it looks clear enough to launch is Thursday - which by coincidence is the day the electricity board are turning off the power all day for street maintenance.
[15:49] <LazyLeopard> Oh joy...
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[17:16] <mclane> hi
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[18:59] <Dan-K2VOL> hi all
[18:59] <fsphil> evening Dan-K2VOL
[18:59] <fsphil> how's things over yonder?
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[19:02] <Upu> evening Dan-K2VOL
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[19:09] <Dan-K2VOL> going well fsphil, upu
[19:09] <Dan-K2VOL> do you guys know of any code handy for burst detection?
[19:09] <Upu> sure
[19:09] <Upu> if ascent rate > -1 {
[19:10] <Upu> well
[19:10] <mattbrejza> if (altitude < max_altitude -500) {
[19:11] <Upu> obviously not that but in what mattbrejza says or if the ascent rate has gone negative
[19:11] <Laurenceb_> if(ascent rate == sqrt(-1))
[19:12] <Laurenceb_> ill just leave this here
[19:12] <Laurenceb_> https://netfiles.uiuc.edu/a-jacobi/www/Frost/FrostControl.pdf
[19:12] <daveake> n consecutive descent rates > some number
[19:12] Action: Laurenceb_ looks at eroomde
[19:12] <Laurenceb_> GOOGLE KNOWS
[19:13] <Dan-K2VOL> hehe
[19:18] <Laurenceb_> http://en.wikipedia.org/wiki/Dubstep#Brostep_and_American_developments
[19:18] <Laurenceb_> ^rofl
[19:21] <simrun> Cheap SDR recommendations guys?
[19:21] <Upu> hardware or software ?
[19:21] <simrun> Upu, hardware
[19:21] <Upu> EZCAP's are good and cheap, no longer have the E4000 tuner in them but they are buttons from dealextreme.com
[19:21] <MrScienceMan> ezcap if you are looking for something cheap
[19:22] <Upu> however when you get it fit the ESP diode that they forgot
[19:22] <simrun> well, value is more important than cheapness
[19:22] <Upu> https://www.dropbox.com/s/m5w21hwi6jkzy3t/2012-07-10%2015.02.02.jpg?m
[19:23] <fsphil> oh yea, meant to cheack the other rtl-sdr for the diode
[19:23] <Upu> Thats one I modded earlier note the diode next to the SMA RF feed
[19:23] <Upu> its likely missing
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[19:23] <MrScienceMan> that one has it :)
[19:23] <Upu> it has one now I fitted it
[19:24] <MrScienceMan> "no longer have the E4000 tuner"
[19:24] <MrScienceMan> good or bad thing?
[19:24] <Upu> well for what we do makes no difference
[19:24] <Upu> I understandt he E4000 tuner had a better range
[19:25] <MrScienceMan> drivers?
[19:25] <Upu> but Elonics who make it went bust
[19:25] <Upu> drivers don't matter its the RTL chip you are getting drivers for, tuner independent
[19:25] <MrScienceMan> ahh, so you completely bypass the tunner
[19:26] <Upu> I think the E4000 goes higher in frequency but for balloon tracking either should do
[19:26] <simrun> so e4000 is the tuner to look for?
[19:26] <Upu> well yes if you can find one
[19:26] <Upu> but don't pay over the odds
[19:26] <BrainDamage> E4000 has less gaps in frequency
[19:26] <MrScienceMan> ebay then?
[19:26] <BrainDamage> but it's a tiny range that you need for HAB
[19:26] <Upu> http://www.dealextreme.com/p/mini-dvb-t-digital-tv-usb-2-0-dongle-with-fm-dab-remote-controller-92096?item=6
[19:27] <Upu> note comments does have E4000 tuner
[19:27] <Upu> actually it doesn't
[19:27] <Upu> any more
[19:28] <simrun> Upu, how long since its stopped including it?
[19:28] <Upu> not sure but the ones I've bought in the last 2 weeks are all new
[19:28] <Upu> https://dl.dropbox.com/u/63720513/Images/HAB/HAB%20Filter/IMG_0693.JPG
[19:29] <Upu> bottom I bought about 4 weeks ago
[19:29] <Upu> top was 2 weeks ago
[19:29] <Upu> both have same case
[19:29] <Upu> and are called 668
[19:29] <Upu> afk
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[19:29] <fsphil> ah, my newer rtl-sdr has no diode
[19:30] <Laurenceb_> ode to a diode
[19:31] <Upu> yeah if they are missing the diode don't plug them into a big antenna
[19:31] <fsphil> yea, I'll keep it safe
[19:31] <Upu> you can fix yours tomorrow
[19:31] <fsphil> trying to find out what tuner it is
[19:31] <fsphil> ooh, E4000
[19:32] <fsphil> and this one is only a few weeks old
[19:34] <fsphil> that top pin is gonna be pretty tricky to solder
[19:35] <Upu> nah :)
[19:36] <fsphil> there's a good bit of solder on the antenna socket right next to it
[19:41] <simrun> What about the TV301U (http://i00.i.aliimg.com/img/pb/419/949/447/447949419_694.jpg). Anybody have experience with it?
[19:42] <kokey> yay
[19:42] <costyn_> kokey: have a working fone?
[19:43] <kokey> costyn_: almost, yes
[19:43] <mattbrejza> https://www.cosycave.co.uk/category.php?id_category=56
[19:43] <kokey> the one works, though the screen I transplanted is damaged, has a huge dark mark down the one side
[19:44] <mattbrejza> simrun: my tv301u has the diode on the input
[19:44] <kokey> I wonder how much a new screen is
[19:45] <simrun> mattbrejza, you ordered it from cosycave?
[19:45] <simrun> and it definitely has the e4000?
[19:47] <mattbrejza> yep
[19:47] <simrun> mattbrejza, is it all working well?
[19:48] <mattbrejza> yea still works unlike some here, and im not the only one to use cosycave
[19:48] <simrun> mattbrejza, you mean some people's tv301u broke?
[19:49] <mattbrejza> oh i didnt mean some peoples tv301u, i ment some other rtl units
[19:49] <mattbrejza> but that does just seem to be down to the diodes
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[19:50] <simrun> hmmm i dunno which of the two to order now :p
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[20:01] <Lunar_Lander> hello
[20:06] <kokey> I suppose I can buy headers at maplin
[20:11] Nick change: costyn_ -> costyn
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[20:13] <nick_> Can anyone suggest a decent soldering station?
[20:13] <mattbrejza> depends how much you want to spend
[20:13] <nick_> I realised I'm spoilt at work and can't afford that kind
[20:13] <nick_> But I'm getting married, so... presents!
[20:16] <Lunar_Lander> we got Weller WCTS I think
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[20:17] <Daviey> 20:21 < simrun> Cheap SDR recommendations guys?
[20:17] <Daviey> 20:21 < Upu> hardware or software ?
[20:17] <Daviey> by defintion all SDR's are software, no? :)
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[20:17] <nick_> http://www.amazon.co.uk/Weller-WHS40-Temp-Controlled-Solder/dp/B0009VX22S/ref=sr_1_2?s=diy&ie=UTF8&qid=1341951412&sr=1-2 is good?
[20:18] <nick_> Daviey: you need some hardware to get your signal into a computer...
[20:18] <Daviey> nick_: Yes, but it's a Software Defined Radio.. no?
[20:19] <nick_> Yes
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[20:20] <nick_> And generally the software is free
[20:20] <Daviey> nick_: You are missing my point...
[20:21] <mattbrejza> well the software has to run on something
[20:21] <mattbrejza> and the software is either free or super expensive
[20:23] <Lunar_Lander> hi daveake I determined the voltage divider resistors, unfortunately could not test it today
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[20:28] <kokey> nick_: people have been recommending the hakko fx-888 soldering iron
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[20:50] <Laurenceb_> i use a blackjack bk-6000
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[20:57] <Lunar_Lander> hello Laurenceb_
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[20:59] <Lunar_Lander> hi jdtanner
[21:00] <Lunar_Lander> Laurenceb_, thanks again for the information about making a PCB, I today thought again of nick_ 's suggestion of making a shield for my arduino mega
[21:01] <jdtanner> evening
[21:01] <Lunar_Lander> I was just thinking, if I got Upu's GPS for instance, how do I mount it on a shield, it being a breakout board on its own
[21:06] <mattbrejza> you could buy the one that isnt on a breakout board
[21:06] <mattbrejza> or put the breakout board on a wires, then have thoe wires plug onto your pcb
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[21:06] <mattbrejza> then you can position the gps better
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[21:17] <Lunar_Lander> ah
[21:18] <Lunar_Lander> mattbrejza, i.e. don't have header pins on the breakout but rather wires?
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[21:36] <mattbrejza> yep
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[21:38] <Lunar_Lander> and on the shield I have to define the "ports" where the wires go to
[21:38] <Lunar_Lander> OK the next question might be a bit difficult to understand
[21:38] <Lunar_Lander> suppose I have that place where the GPS goes to
[21:38] <Lunar_Lander> then I have to run the data lines to an Arduino UART
[21:39] <Lunar_Lander> can I have like headers on the shield that plug into the arduino and route the data lines to the correct headers/pins?
[21:40] <nick_> Lunar_Lander: let me get this right
[21:40] <nick_> You are making an arduino shield
[21:40] <nick_> And want a GPS breakout separately
[21:40] <Lunar_Lander> I am thinking about it
[21:40] <Lunar_Lander> well that was just because I have bought the GPS as it is from Upu
[21:41] <nick_> And you want to connect them via some wires connected to header pins?
[21:42] <Lunar_Lander> I want to connect the GPS to the arduino in the best way possible on the shield
[21:42] <nick_> What's the pinout of the GPS board?
[21:42] <Lunar_Lander> wait
[21:43] <Lunar_Lander> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[21:43] <Lunar_Lander> it looks like this
[21:44] <nick_> YOu could quite easily use a ribbon cable, then put headers on your board that correspond to those pins
[21:45] <mattbrejza> either you solder the breakout directly ontop of your pcb, put the breakout on wires that then has a connector to the pcb, or you buy the gps bare and solder it direclty to the board along with the antenna, make your decision :)
[21:45] <Lunar_Lander> yea
[21:46] <Lunar_Lander> so far I only have breakouts of all my things
[21:46] <Lunar_Lander> like this one, and the sensors and the OpenLog and so on
[21:46] <nick_> Personally I'd be tempted to go with the ribbon cable
[21:46] <Lunar_Lander> yea
[21:46] <Lunar_Lander> maybe we first do our stripboard
[21:46] <Lunar_Lander> and then we learn EAGLE and then we make a PCB
[21:46] <Lunar_Lander> :)
[21:46] <nick_> What's OpenLog?
[21:47] <Lunar_Lander> wait
[21:47] <Lunar_Lander> https://www.sparkfun.com/products/9530
[21:47] <Lunar_Lander> this is made by sparkfun
[21:47] <nick_> Neat
[21:47] <Lunar_Lander> it carries a atmega328 preprogrammed to write any serial input to the microSD that is inserted
[21:47] <Lunar_Lander> yeah
[21:47] <mattbrejza> is the openlog and ublox the reason you need two uarts?
[21:48] <Lunar_Lander> yes, and I got the mightyohm Geiger Counter which I want to fly some time in the future
[21:48] <Lunar_Lander> that needs another RX
[21:51] <nick_> I guess I should add a serial input to my logger
[21:51] <Lunar_Lander> I got a question on the Geiger
[21:51] <Lunar_Lander> it has a serial output which connects to a FTDI breakout if you connect it to the PC
[21:52] <Lunar_Lander> and NickB1 here flew it and simply wired the TX to RX3 of arduino
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[21:52] <Lunar_Lander> but as you should connect all grounds together, should you also wire the GND of the SERIAL of the GC to the arduino?
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[21:52] <mattbrejza> yea
[21:52] <Lunar_Lander> ah
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[21:54] <Lunar_Lander> mattbrejza, at the moment I programmed the GPS to work on UART1 as I am using the connection to the PC to look at the output and I read that this occupies UART 0
[21:54] <Lunar_Lander> but when I am like done programming, there is no reason not to use UART 0, right?
[21:55] <mattbrejza> well you can share a uart out with say the gps input
[21:56] <mattbrejza> the gps ignores all your debug stuff
[21:56] <Lunar_Lander> yea
[21:57] <Lunar_Lander> but I have to send something to the GPS and also have to send the GPS data to the PC
[21:57] <Lunar_Lander> so my program has Serial and Serial1 statements
[21:57] <Lunar_Lander> (sorry I can't show the program at the moment as it is on the University Laptop)
[21:57] <nick_> If you share your GPS with the USB serial then I think you should make sure it's not connected when you're programming, but otherwise should be fine.
[21:57] <Lunar_Lander> ah
[21:57] <Lunar_Lander> yeah, that is what I read here, thanks for the reminder
[21:58] <Lunar_Lander> and on the balloon there won't be debugging, so that should be OK
[21:58] <mattbrejza> the gps can output to the arduino and the computer
[21:59] <mattbrejza> you could have a little jumper to select whether the gps outputs to the computer or hte ardiuno
[21:59] <Lunar_Lander> good idea
[22:00] <mattbrejza> do you have a schematic of all this drawn yet? its best to get the ideas down while they are fresh
[22:01] <Lunar_Lander> yea
[22:01] <Lunar_Lander> I wanted to do that tomorrow when I meet my teammates
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[22:32] Action: fsphil is having a lazy night
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[22:32] <fsphil> suppose to be payload building
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[22:38] <Lunar_Lander> hey fsphil
[22:41] <fsphil> evening!
[22:41] <Lunar_Lander> how are you?
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[22:43] <fsphil> all good here, yorself?
[22:44] <Lunar_Lander> me too, thanks
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[22:49] <Lunar_Lander> what will your next payload do?
[22:49] <MrScienceMan> make toast
[22:50] <Lunar_Lander> xD
[22:52] <MrScienceMan> my initial reaction as well
[22:52] <MrScienceMan> then i woke up
[22:53] <fsphil> mmm toast
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[00:00] --- Wed Jul 11 2012