highaltitude.log.20130816

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[00:45] <nbartolomeu> Hi
[00:45] <nbartolomeu> Anybody there?
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[00:46] <nbartolomeu> I´m planning to lunch an HAB and I´m having trouble setting up a GPS module with the arduino
[00:48] <nbartolomeu> The GPS is a ublox Max-6
[00:48] <nbartolomeu> Hello?
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[01:05] <cde> Hello.
[01:06] <SpeedEvil> nbartolomeu: Most here are asleep
[01:06] <SpeedEvil> nbartolomeu: Primarily a UK channel
[01:07] <nbartolomeu> Hi
[01:07] <nbartolomeu> Thanks for your response
[01:09] <nbartolomeu> Does anyone has experience in linking a GPS (ublox Max-6) to an arduino?
[01:10] <nbartolomeu> I followed a tutorial ( http://ava.upuaut.net/store/wiki/doku.php?id=frontpage:levelconvertor ) but I´m receiving no response from de GPS unit
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[07:07] <fsphil> morn'n'stuff
[07:09] <number10> what sot of stuff
[07:09] <number10> sort
[07:10] <fsphil> the usual things that come with a grim bleak morning
[07:10] <fsphil> (not true, actually quite sunny here today!)
[07:11] <number10> raining here :(
[07:14] Nick change: HixGoneHome -> HixWork
[07:15] <HixWork> morn'
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[07:22] <x-f> tgif morning
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[07:33] <ibanezmatt13> Morning
[07:34] <fsphil> we where just discussing that
[07:34] <ibanezmatt13> morning?
[07:35] <fsphil> yep :)
[07:35] <ibanezmatt13> cool :)
[07:35] <ibanezmatt13> I've had a cool thought about a balloon/glider project. We could use the LMT2 transmitter/receiver to send telemetry as normal but receive commands from down here for a flight computer on board to make decisions by
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[07:36] <ibanezmatt13> So, send coordinates to the LMT form here and using some trignometry and stuff like that it can work out what it needs to do to get therer
[07:36] <ibanezmatt13> And then I can have a multichannel servo controller for the control surfaces
[07:37] <ibanezmatt13> :
[07:37] <ibanezmatt13> 2:00 in the morning I awoke with the thought and now I'm biggered
[07:37] <ibanezmatt13> buggered*
[07:39] <ibanezmatt13> I kinda like it
[07:40] <ibanezmatt13> So we could send the glider up to an altitude of say 50000ft, then execute a controlled release of the balloon and then control the flight back to a specific location. And because it's the LMT, say we want some specific info about the aircraft state, we send it a message and it responds with some data we want
[07:41] <ibanezmatt13> We could have a nice 1/4 wave antenna channelled in the the fuselage
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[07:42] <ibanezmatt13> That's my next project :) See you later
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[07:44] <HixWork> who's going to break the ANO news to him?
[07:47] <x-f> heh
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[07:49] <mclane> Hello, someone here to approve a flight doc?
[07:49] <UpuWork> shoot mclane
[07:50] <daveake> harsh
[07:50] <UpuWork> haha
[07:50] <mclane> here is the id: c609975b56febe76b7ea6564c07199bb
[07:50] <UpuWork> PYSY-7 ?
[07:50] <mclane> I am used to it
[07:50] <mclane> Yes PYSY-7
[07:50] <UpuWork> you better have checked it this time or I'm deducting HAB points
[07:50] <UpuWork> approved
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[07:51] <mclane> yea check has been done - working
[07:51] <cde> what is PYSY-7
[07:51] <HixWork> hi Babs
[07:51] <x-f> what time are you launching tomorrow, mclane?
[07:51] <mclane> but I will check again ;-)
[07:51] <Babs> morning hixwork, morning everyone
[07:51] <mclane> Launch time planned for 7:30 UTC
[07:51] <Babs> that sounded like we used to greet our teachers
[07:52] <HixWork> 'ere Miss
[07:52] <daveake> Quiet at the back
[07:52] <HixWork> I was always sat at the front. Not by choice i may add
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[07:53] <Babs> out of my new house I have an awesome 20 degrees out of 360 that doesn't face into a brick wall. I feel my chances of tracking balloons will be limited.
[07:54] <HixWork> you need a very good "TV Aerial" on a high mast, just to make sure that you can receive Masterchef with no interference
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[07:55] <daveake> Tracking doesn't get harder than this
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[07:58] <mclane> daveake: what are you using to develop SW for your raspi-based payloads?
[07:58] <mclane> Python? C? C++?
[07:58] <daveake> C
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[07:59] <mclane> do you cross-compile or develop directly on the raspi?
[07:59] <daveake> Mainly because I already had a work C tracker for Arduino, and just ported it over
[07:59] <daveake> Direectly
[07:59] <mclane> no ide?
[07:59] <daveake> Pah
[07:59] <daveake> :)
[08:00] <daveake> No, just edit with vi on the Pi
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[08:00] <KiwiDean> Old school :-)
[08:00] <mclane> ok, the hardcore-way to do things ;-)
[08:00] <daveake> Well the s/w doesn't need a UI so there's little to be gained
[08:02] <mclane> what about timing?
[08:02] <mclane> I mean timing to be done for the rtty
[08:02] <daveake> I cheat. Just use the serial port.
[08:03] <daveake> DMA PWM is also possible
[08:03] <mclane> with the gps in parallel?
[08:03] <daveake> Then you'd set up memory with the rtty pattern
[08:03] <daveake> i2c GPS
[08:03] <mclane> ah, ok; will try that
[08:03] <daveake> You realise I'm giving away my conference workshop here? :)
[08:04] <eroomde> no ide is hardcore now?
[08:04] <daveake> haha
[08:04] <mclane> I willl not be able to attend ;-)
[08:04] <number10> thats going to be a short one now daveake
[08:04] <mclane> no, vi is hardcore
[08:04] <daveake> You can use nano or something
[08:04] <mclane> used on a pdp10 25 years ago
[08:05] <daveake> Or install SAMBA and edit from your pee cee
[08:05] <daveake> Well, thing with vi is, 25 years later your fingers still remember the commands
[08:05] <mfa298> I thought everyone used vi to code in C/C++
[08:06] <KiwiDean> No mention of emacs here?
[08:06] <daveake> There's always a mention of emacs
[08:06] <mclane> I was waiting for that
[08:06] <mfa298> I think there is someone that's a fan of emacs here, but they may have learnt to be quiet.
[08:08] <number10> not using ed then daveake ?
[08:08] <KiwiDean> I was about to say you could here a pin drop!
[08:09] <eroomde> probably best if the emacs fans stay quiet
[08:09] <daveake> ed can use whatever editor he likes
[08:09] <eroomde> unlike the fans on their cpus
[08:09] <eroomde> i use vi for everything
[08:10] <daveake> good choice
[08:10] <fsphil> I used vi for my callsign
[08:10] <eroomde> shopping lists, all coding, dissertation, drafting emails
[08:10] <eroomde> commit messages
[08:10] <eroomde> it's just the editor
[08:11] <number10> I though that was for the scouring powder fsphil ;)
[08:13] <fsphil> that vim doesn't help you edit C code
[08:14] <eroomde> it helps me
[08:14] <eroomde> ctags are my friends
[08:15] <number10> my code need a good clean up fsphil
[08:15] <number10> +s
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[08:26] <Ugi> Good morning fellow inHABitants
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[08:29] <Steve_2E0VET> Do people really put the ntx2 and ublox in the freezer to test
[08:29] <eroomde> yes
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[08:30] <Steve_2E0VET> Can I do it with normal alkaline batteries
[08:30] <danger89> hi there all
[08:30] <danger89> somebody from holland here?
[08:31] <eroomde> Steve_2E0VET, not sure, but it's best to use the flight system
[08:31] <eroomde> if it's testing the whole system
[08:31] <daveake> Steve_2E0VET If you put a running tracker in a freezer with alkaline batteries, you'd soon find out why we all use Energizer Lithiums
[08:31] <eroomde> otherwise just use an external power supply with wires running out of the freezer door
[08:32] <daveake> As Ed says, best to test the system as a whole
[08:32] <Ugi> Steve_2E0VET: alkaline batteries are close to useless at low temperatures. I'd bet that they will fail in a freezer at -20
[08:32] <HixWork> danger89 costyn is/was
[08:33] <danger89> ah I see nice
[08:34] <HixWork> and Maxell
[08:34] <danger89> thx
[08:35] <HixWork> you could try #revspace too
[08:36] <eroomde> there is a good dutch presence
[08:36] <eroomde> they often get a lot of our payloads
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[08:39] <danger89> oke, but strange I didn't see anything from the netherlands here: http://spacenear.us/tracker/
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[08:40] <x-f> bertrik is from .nl and RevSpace too
[08:40] <eroomde> there usually are ductch listeners
[08:41] <eroomde> dutch*
[08:41] <x-f> danger89, towers on the map are not permanent, they expire in 24 hours
[08:42] <danger89> ow that's kinda short
[08:42] <bertrik> danger89: hi, yes, we have hab tracker setup at our hacker space in the hague, west part of the netherlands
[08:43] <danger89> ja ik ken het ;)
[08:43] <danger89> i'm living in central poart of holland and working in noord-brabant
[08:44] <danger89> but I love to see a launch of a high altitude bolloon :D
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[08:49] <bertrik> costyn was the driving force behind the launches, he also know all of the practical details, but he moved out of the netherlands
[08:50] <bertrik> there are currently no plans to do a next launch from revspace
[08:50] <bertrik> we do still have the electronics for the payload though
[08:50] <HixWork> Can't forget TimZamman
[08:50] <HixWork> and his crazy antics :D
[08:51] <daveake> hah :)
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[08:54] <x-f> bertrik, but.. but.. Maxell said, you will launch a floater! and costyn is available every now and then remotely! and here's the whole #ha to help
[08:54] <PB0NER> I'm interested...
[08:54] <x-f> ^^
[08:54] <PB0NER> I was looking for a way to receive announces of launches
[08:55] <eroomde> you don't need costyn's knoweledge. you can definitely put a hab together
[08:55] <eroomde> you're a hackerspace!
[08:55] <x-f> PB0NER, join the mailing list - http://groups.google.com/group/ukhas
[08:55] <PB0NER> thx...
[08:56] <danger89> :P
[08:58] <danger89> well we will see..
[08:59] <bertrik> x-f: oh, maybe I'm just sounding a bit too negative. People at the hackerspace are sympathetic to the idea of launching another hab, but there's nothing concrete yet as far as I know.
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[08:59] <PB0NER> have trouble with google... created a test gmail addres... and now suddenly all my mail(inglist subscriptions) end up there. never told gmail to do so and do not seem to be able to change it back
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[09:25] <Babs> reaction wheel fail http://www.bbc.co.uk/news/science-environment-23724344 - I am going to make a frequency graph of trending concepts in HAB. I remember this one in May 2013.
[09:26] <Babs> hyperloop will be excluded from the analysis
[09:27] <eroomde> i thought they had already done that
[09:29] <eroomde> ah
[09:30] <eroomde> reaction wheels are stupid things
[09:31] <eroomde> they need to make ones that don't wear out
[09:35] <PB0NER> hell, I had to remove the gmail. Google starts acting like Microsoft
[09:38] <Joel_re> did Elon explain his idea of Hyperloop as yet?
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[09:40] <nbartolomeu> Hi
[09:41] <UpuWork> morning nbartolomeu
[09:41] <UpuWork> https://dl.dropboxusercontent.com/u/63720513/PDFS/BO-M6ALC%20Instructions.pdf
[09:41] <UpuWork> try follow those intructions and see if you get anything
[09:42] <UpuWork> if not switch RX & TX round
[09:42] <G0TDJ_Steve> Morning Anthony
[09:42] <UpuWork> Morning Steve
[09:42] <G0TDJ_Steve> Quick question for my friend Lee:
[09:42] <G0TDJ_Steve> What size are the SMD resistors and LEDs on that board please?
[09:42] <PB0NER> Can anyone explain the fuzz about hyperloop? seems a reinvented '50s idea to me....
[09:42] <UpuWork> 0805
[09:43] <G0TDJ_Steve> Thanks :-)
[09:43] <PB0NER> ... or I miss something
[09:43] <G0TDJ_Steve> Any launches in EU coming up guys?
[09:43] <UpuWork> When Elon Musk speaks people listen...
[09:43] <PB0NER> just saw something about tomorrow
[09:44] <nbartolomeu> Tks
[09:44] <PB0NER> announces are made here:http://groups.google.com/group/ukhas
[09:44] <PB0NER> (as I just found out :-P
[09:44] <bertrik> would be nice if there were some sort of calendar
[09:45] <PB0NER> there is a not very well updated .ics
[09:45] <G0TDJ_Steve> There is bertrik but it's not kept very up to date ;-)
[09:45] <UpuWork> bertrik http://habitat.habhub.org/calendar/
[09:45] <UpuWork> its driven from habitat so as long as the document is approved it should appear
[09:45] <G0TDJ_Steve> UpuWork: Idea, when the tests come up on Tracker, could they easily contain a field for scheduled launch date?
[09:46] <UpuWork> not really as people test stuff months before deciding on a date
[09:47] <G0TDJ_Steve> OK Well, maybe just a label that shows it's a test rather than a launch
[09:53] <daveake> Well ideally there'd be a separate test version of spacenear
[09:54] <G0TDJ_Steve> Yep, that would be good
[09:54] <daveake> spacenotnear.us
[09:54] <G0TDJ_Steve> LOL
[09:54] <mfa298> I just apply the common sense approach. Has it been seen recently, how many listeners, where is it, has it been announced.
[09:54] <daveake> quite
[09:54] <mfa298> it's surprisingly easy :D
[09:55] <daveake> It is :)
[09:56] <daveake> I've lost count of how many times someone has asked for a frequency for a flight, and a 10 second peek at spacenear reveals it's just a test
[09:56] <number10> best way to see if there is a flight is to look to see if documents approved at http://habitat.habhub.org/ept/
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[09:56] <G0TDJ_Steve> S'Pose you're right mfa298 but it would be nice to isolate tests from flights
[09:57] <daveake> It would. It's annoying when tests pop up just before or during a flight
[09:57] <daveake> That's a slapping offence
[09:58] <number10> that really is not good form to test during someone elses flight
[09:58] <mfa298> I think seperating tests from real flights has been talked about a few times but I suspect it's low on someones list of things to do.
[09:58] <Joel_re> what interval do you guys normally send gps data at?
[09:59] <Joel_re> from the onboard gps
[09:59] <x-f> none, if possible :)
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[10:00] <daveake> You mean telemetry over the radio? That's a result of the sentence length and baud rate, and any gaps between sentences. Typically for 50 baud it's about 15 seconds
[10:00] <mfa298> most people continually send data unless there's a good reason not to (trying to conserve power on really long flights)
[10:00] <x-f> charolastra, there'a flight tomorrow morning in South Germany, you'll be in its range for some time
[10:00] <Joel_re> ok
[10:01] <mfa298> remember it's processed gps data not just raw nmea/ubx strings
[10:01] <Joel_re> I just realized the uart on my Uc is reading from the module at 9600 baud and will need send at 50 baud
[10:01] <Joel_re> yep
[10:02] <daveake> Yeah, that's partly why you have a micro in there. The other big reason is that you need to add the payload ID otherwise there's nothing to distinguish between separate flights
[10:04] <astrobiologist> I bid for a Kenwood TH_F7E on eBay... I see the 817 is over £300 now! These things really hold their value
[10:04] <astrobiologist> I would also be interested in making a patch antenna. I used a commercial one before to good effect. Any ideas as to how to DIY one, especially keeping it pretty light?
[10:04] <daveake> I've said this before ... for anyone only doing a flight or two, don't worry about the price as you can put it back on ebay after and get your money back
[10:05] <daveake> I'm on my 3rd scanner and II made a profit on both of the first two :p
[10:06] <Joel_re> cool
[10:06] <Joel_re> thanks
[10:06] <charolastra> x-f: great, got a time estimate?
[10:06] <gonzo__> patch antenna, fopr what band?
[10:06] <astrobiologist> I am really getting into doing some ham too, and space is confined (windowsills etc), hence after weighing things up a handheld seemed better, and it can receive ssb. Windowsill also lends itself to patch antenna I thought, really no space for a yagi
[10:07] <astrobiologist> gonozo, if the patch is fairly lightweight, the sky would be pretty much the limit, no? It's basically just two seperated planes, each of 1/2 wavelength per side, or have I got that wrong?
[10:07] <gonzo__> for receive, a small yagi ot hb9cv on the windowsill is fine. Or go out in the car with a magmount and find a bit if clear space
[10:08] <x-f> charolastra, details - https://groups.google.com/forum/#!topic/ukhas/aAjQ54ZBWBE
[10:09] <gonzo__> the actual dinension are probably a bit more complicated that that. So you would bneed to get a proven design to build from. But at 70cm, a patch is going to be quite big
[10:10] <mfa298> astrobiologist: there was an 817 that someone spotted in ebay last night that went for £311.
[10:10] <gonzo__> 3-4ele yagi pointed out of the window or a 5/8 over 5/8 coliniear magmount on the car would be fine for hab
[10:10] <astrobiologist> thanks gonzo. Where would be a good place to look for small yagis? I've got to keep things fairly discrete, I'm smuggling all this into work ;-)
[10:11] <gonzo__> moonraker, or ebay
[10:11] <astrobiologist> mfa298 I think it's the same one I'm monitoring, which is £311 right now but still two days to go! Anyway I didn't agonise too much ,I don't have £300 right now :-)
[10:11] <gonzo__> the hb9cv is a useful litytle antenna
[10:11] <astrobiologist> gonzo yes, looking at it now. But where does it get its name?
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[10:13] <HixWork> astrobiologist http://stratosvision.com/docs/Mountain_Yagi_434_4Element.pdf
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[10:20] <astrobiologist> I have some morse questions for the foundation exam, perhaps could someone who is arranging it come over to #ukhasconfexams?
[10:21] <eroomde> deliberate typo?
[10:23] <mfa298> looks like craag is in there so he'll probably reply to questions when he's around otherwise you probably need Upu/Upuwork for the organisation side of things.
[10:24] <G0TDJ_Steve> astrobiologist: Morse questions?
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[10:26] <astrobiologist> mfa298, G0TDJ_Steve, it was basically about morse trees and if that is "cheating"
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[10:27] <G0TDJ_Steve> I don't believe so, it's not a real-time decode, just an awareness thing.
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[10:27] <G0TDJ_Steve> You should just learn it :-)
[10:27] <daveake> When I did mine earlier this year, all I had to do was listen and write down the dots/dashes, then convert using a handy lookup table.
[10:28] <daveake> Unless you're deaf you'll pass
[10:28] <mfa298> As G0TDJ_Steve said (and I said in the other chan) I don't think there's an issue
[10:28] <mfa298> I think the morse being sent can also be repeated if you miss bits and sent at any speed.
[10:29] <mfa298> although for the bits of morse I know I think I'd struggle at slow speeds.
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[10:32] <charolastra> x-f: lol, you have to be kidding me: "Launch time planned for 7:30 UTC", which would be 5:30 local time ;)
[10:33] <x-f> local time would be 9:30 CEST :)
[10:33] <astrobiologist> thanks daveake, mfa298. I think you can ask for a particular speed, I just don't want to make myself look silly by asking for 1 character per 5 seconds or something, so I wondered what a non-p*** take speed to ask would be. And of course if I can learn a bit beforehand
[10:33] <astrobiologist> then it can be more of a real "test".
[10:34] <charolastra> x-f: oh yeah, right ... but it's still too far away :/
[10:36] <mfa298> I think most people just go for writing down the dots and dashes and then convert using a lookup table.
[10:37] <mfa298> if you're going to try learning morse you need to learn the sounds not the dots and dashes.
[10:38] <astrobiologist> Here is a more general ham question - in the amateur radio band plans given in the foundation exam, for instance 2m, where can you actually talk? Everything seems dedicated to data, RTTY etc. I see repeaters but not anything you can just call and talk on.
[10:39] <charolastra> depends where you are; europe is 430-440
[10:39] <charolastra> uhm, 144-146 ;)
[10:39] <astrobiologist> Thanks mfa298, I will just try listening to some and using the tree. If I pick it up, fine, if not then I will ask for a low speed during the test and just write it down to decode later!
[10:39] <astrobiologist> Charolastra I've got the 144Mhz band plan in front of me, it looks totally chocca
[10:40] <mfa298> astrobiologist: the software i mentioned on the other channel is good for helping you pick it up, it starts off with a couple of characters and builds up the letters (a bit like a typing tutor)
[10:40] <Randomskk> astrobiologist: you can talk on most of it. anything that says phone is usually specific for talking.
[10:40] <Randomskk> or SSB
[10:40] <x-f> charolastra, at 30km altitude it will be above your horizon - http://i.imgur.com/BoNc9Zz.png - not much, but still above the horizon, besides they expect it to go way higher than 30km
[10:41] <Randomskk> or voice. the calling frequency will usually be in the middle or at one edge of the voice bits too.
[10:41] <Joel_re> what time in the day do you guys normally launch
[10:42] <mfa298> for the 2m band I've got here it lists 145.200 - 145.5935 as FM Simplex. inside that are certain spot frequencies with particular common uses (such as 145.500 Mobile Calling)
[10:42] Nick change: Bo|2 -> Bo_DK_Working
[10:43] <charolastra> x-f: yes, assuming a good antenna; the one in slovakia was nearer i didn't hear it at all :(
[10:44] <mfa298> you can sometimes get an idea of what modes to use based on the bandwidth 2700Hz -> SSB, 12/20 KHz -> FM
[10:44] <astrobiologist> mfa298, I'll give a breakdown for these frequencies from the 2m band list in the foundation booklet - I'll put it on the #ukhasexams chat to avoid boring people!
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[10:46] <Brew> Morning all, Am i right in thinking with dl-fldigi running on my mac I should be able to receive data locally from my raspberry pi? I'm just banging my head against it at the moment
[10:47] <SpeedEvil> You can in principle connect the audio output of the pi to the audio input of your mac
[10:47] <SpeedEvil> I don't know if it'd work
[10:48] <bertrik> hm, regensburg at 40 km high is right on the edge of reception at the hague, netherlands
[10:48] <Brew> sorry I have a NTX2 on the pi and the EZCap on my mac
[10:48] <charolastra> bertrik: we should tell jarod and willi ;)
[10:49] <bertrik> I think PE2G got some decodes last time, he's more to the east than we are
[10:49] <Brew> Ah comically having just blown my nose I see the waterfall in dl-dlfigi is using my audio input not the ezcap
[10:49] <daveake> good test :)
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[10:56] <SpeedEvil> hah
[11:00] <Joel_re> SpeedEvil \0/
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[11:13] <sharky_> is there a balloon in the air today?
[11:15] <x-f> nope
[11:15] <sharky_> ok tnx
[11:18] <Brew> ok so have gqrx working and can see and hear the tone coming next stop get dl-fldigi to listen to the receiver not the audio i/p
[11:20] <x-f> Brew, on OS X you need Soundflower for that, it will redirect the sound from output to input and let dl-fldigi hear it
[11:20] <Brew> perfect
[11:21] <astrobiologist> Which flavour of OS X x-f, Soundflower installed but never did anything on my Mac. Mind you haven't tried it recently on new Xs
[11:21] <x-f> i'm on 10.6 still..
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[11:23] <x-f> dl-fldigi input is "line-in", soundflower configured to output on "soundflower (2ch)", input on "line in"
[11:24] <x-f> don't think i did anything else
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[11:29] <Willdude123> I had a dream last night that I bpi
[11:30] <Willdude123> bought one of these https://www.sparkfun.com/products/11218
[11:30] <Willdude123> And ended up buying another arduino.
[11:30] <Willdude123> For some reason.
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[11:40] <Ugi> Willdude123: you going to send up a hydrogen balloon & then ignite at altitude? - 3 cubic meters of hydrogen would make quite a fireball!
[11:40] <Willdude123> No probably not.
[11:40] <Ugi> shame.
[11:40] <Willdude123> CAA might have a few qualms about airborne explosions.
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[11:41] <Ugi> killjoys
[11:42] <Brew> looks ace
[11:43] <Babs> Presumably with no air it wouldn't make much of a fireball? Sort of a mild phttttt.
[11:44] <SpeedEvil> If you fill it with stochiometric oxygen or even air, it'd be quite loud.
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[11:44] <SpeedEvil> And very well coupled to the air.
[11:44] <SpeedEvil> (Do not do this)
[11:47] <Babs> I think greater hab points available if you could get one up there and taser Babbage the Bear before he jumps.
[11:47] <Babs> no ground based tracker needed, just buy a bloodhound trained to track down the smell of singed plush fabric
[11:50] <Brew> Cool I now have a waterfall running on dl-flsigi thanks to gqrx now to try and send some data
[11:53] <SpeedEvil> :)
[11:55] <daveake> Babs I get enough hassle from people telling me it's cruel to send him up without oxygen and a pressure suit :p
[11:56] <Darkside> daveake: hav you done the babbage launch yet?
[11:56] <Darkside> well, the teddy baumgartner
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[11:56] <daveake> Sunday 25th
[11:56] <daveake> Hopefully
[11:56] <Darkside> ahh ok
[11:56] <Darkside> cool
[11:56] <daveake> Predictions have been a bit shit
[11:56] <HixWork> Babs you got me all excited with your Bloodhound comment the, until I read it properly :/ http://goo.gl/NY5kdu
[12:00] <Brew> I can use "echo Hello World > /dev/ttyAMA0" to get it to spike how to i transmit some text from the Pi through the NTX2 to dl-dldigi. I'm also asking doing all this in my garage with no antenna I'm not upsetting anyone else?
[12:01] <daveake> That echo command does it. You just need to get the baud rate etc matching between Pi and dl-fldigi
[12:02] <daveake> e.g. stty 300 < /dev/ttyAMA0 will set 300 baud on the Pi
[12:02] <Brew> so i should see "Hello World" in the pale peach section of the dl-fdigi?
[12:03] <daveake> yes
[12:03] <daveake> But you do need both sides set to the same bvaud rate, parity, stop bits, data bits
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[12:07] <Brew> ok just looking how to do all that in the pi I've found the page in lfdigi apologies for being 'new' with this
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[12:15] <mfa298> Brew: don't worry about being new, we were all new once.
[12:16] <Brew> mfa298: thanks I'm really enjoying it and learning a lot it's just turning into a little pandoras box of bits I need to conquer
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[12:27] <Brew> daveake: I've tried that line then done stty -a which I believe should tell me the status of the comm port and it's still at 9600 any ideas?
[12:28] <cardre> Brew: try a 'sudo' before the command
[12:29] <Brew> stil at 960 under stty -a
[12:29] <Brew> sorry still at 9600 under stty -a
[12:29] <mfa298> checkinh the man page you might want
[12:29] <mfa298> sudo stty 300 -F /dev/ttyAMA0
[12:29] <cardre> the first command sudo
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[12:29] <cardre> yes, that's it
[12:30] <daveake> You shouldn't need sudo
[12:30] <Babs> daveake, I think its less about being cruel to send him up without oxygen and a pressure suit and more that you violated him with a length of solid core wire that worries me
[12:30] <Brew> stty -a still says 9600 should i just ignore that?
[12:30] <daveake> nope
[12:31] <daveake> Have you disabled getty on that port?
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[12:32] <daveake> If I do stty -a < /dev/ttyAMA0
[12:32] <daveake> , then stty 300 < /dev/ttyAMA0
[12:32] <daveake> ,, then stty -a < /dev/ttyAMA0
[12:32] <daveake> again, it does change the baud rate
[12:34] <Brew> ah i was just doing 'stty -a' i assume this must be a different comms bus not that the UART one
[12:34] <mfa298> when doing stty -a it looks like you also need to specify the devicename either with "-F" or "<" without that it gives some other device
[12:35] <Brew> indeed stty -a < /dev/ttyAMA0 now returns 300
[12:35] <daveake> cool
[12:36] <daveake> Yes you have to tell it which device, either way shown, or it won't do what you want
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[12:40] <Willdude123> Hi
[12:40] <Joel_re> minicom -b 9600 -D /dev/ttyXXX
[12:41] <Joel_re> if you'd like to use another tool
[12:41] <Willdude123> daveake are you still planning on launching ted bull?
[12:41] <Joel_re> nice thing about minicom is that it is resumes the connection
[12:41] <Joel_re> if the device is re-plugged
[12:41] <Joel_re> not sure if stty does that
[12:42] <daveake> This device is part of the processor it's not going to get unplugged
[12:42] <Babs> ping eroomde
[12:42] <Joel_re> ooh
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[12:46] <Willdude123> daveake : I wonder if Felix Baumgartner knows about your ted bull flight
[12:47] <mattbrejza> UpuWork: any plans to stock the 26MHz TCXO? :P (farnell and their shipping...)
[12:48] <UpuWork> possibly
[12:48] <UpuWork> just mailing list now
[12:48] <UpuWork> how many do you want ?
[12:48] <Willdude123> hi UpuWork
[12:48] <UpuWork> hi Willdude123
[12:48] <mattbrejza> well i dont, having made my new set of boards before all the TCXO domex stuff was happening
[12:49] <mattbrejza> but for the future i may be interested
[12:49] <UpuWork> I'm going to respond to that
[12:49] <Willdude123> I best do the tin can test for the BBB
[12:49] <Willdude123> See if it interferes then
[12:50] <mattbrejza> that?
[12:50] <UpuWork> Domex on the Si chips
[12:51] <mattbrejza> btw 26MHz is also the cc1101 crystal requirement which is handy
[12:51] <Willdude123> UpuWork i think my final board design is gonna have to have the gps antenna quite far from the board.
[12:53] <mattbrejza> taht crystal doesnt have a Vc pin though...?
[12:53] <Brew> I have ' stty 300 cstopb parodd cs7 < /dev/ttyAMA0' which i believe will set my baud rate to 300, two stop bits, odd parity and character size of 7 which match dl-fldigi https://www.dropbox.com/s/777mlb73qr3azpp/dl-fldigi%20modem%20settings.tiff when i send the echo i just get a read splurge on the waterfall?
[12:54] <UpuWork> no it doesn't
[12:55] <UpuWork> anyone know what the formula is for min step size on the SI4460 ?
[12:55] <mattbrejza> well the series has 'AFC' which is the same, but it doesnt say which ones have that or not :/
[12:55] <UpuWork> something like XtalFreq/2^18 or something
[12:56] <x-f> Brew, screenprint of the dl-fldigi's main window, please?
[12:57] <daveake> Suggest you set 50 baud at both ends, so it lasts longer and its easier to see what's happening
[12:57] <mfa298> Brew: most people run No Parity
[12:57] <mattbrejza> parity is a bit pointless for this
[12:58] <LeoBodnar> Fxtal / 2^21
[12:58] <mfa298> for 300bd you'll also need to increase the Recieve filter bandwidth (at the bottom of the config page) to around 300
[12:59] <daveake> Brew should look like this in dl-fldigi http://imgur.com/F3UZgDx
[12:59] <mattbrejza> im not sure why fldigi lets you set the filter BW below that of the signal :/
[13:01] <Babs> Afternoon UpuWork - long time no speak. Or type as the case may be.
[13:02] <Babs> I remember seeing a vid of you doing some IMU servo action a while back. Did you run a stepper or brushless motor with it at any time by any chance?
[13:03] <UpuWork> me ?
[13:03] <UpuWork> oh that was ages ago
[13:04] <UpuWork> that was whan I had this mad idea about having a automatic roof mounted yagi that compensated for the movement of the car underneth it
[13:04] <Babs> yes, i think it was on a flickr site or some other
[13:04] <Babs> movable yagis are so on trend on here at the moment
[13:08] <Babs> ahh, ok. no worries then. before i buy some stepper motors or brushless motors i just wanted to ask some advice from someone who might have used the former
[13:08] <Babs> thanks
[13:09] <gonzo__> have seen that done with a 2ft dish ant, sticking out of the back of an open top car
[13:09] <UpuWork> right mailed
[13:09] <UpuWork> I just used a model car servo Babs
[13:09] <UpuWork> never took it very far
[13:10] <gonzo__> this was a yaesu az/el mount withe some sw in the controler taking the direction from a gops
[13:10] <gonzo__> gps
[13:10] <HixWork> Babs seen this site? http://goo.gl/lgsDz6
[13:10] <Babs> thats what i am using at the moment. Its working ok but before I design the 3D stuff to go around it I can see its limitations so thought i might go the whole hog to the final drivers
[13:11] <Babs> *drive train and get that working so i know what i am dealing with
[13:12] <Babs> HixWork. there are a couple of these around, there is an open source gimbal that also looks good
[13:12] <Babs> interestingly both use brushless motors so there must be a way of using them
[13:13] <Babs> annoyingly though it will be cheaper and a lot less hassle just to buy one of these and fly it compared with building my own
[13:13] <HixWork> Babs RCgroups.com would be a pretty goos source of info on motors too, there's loads of that kind of action going on with them folks
[13:13] <Babs> but pig headedly (spelling) it now makes me more determined to build my own
[13:13] <Babs> even though it is going to be laughable in the face of someone doing it with pro designers and pro coders
[13:14] <mattbrejza> UpuWork: have you just put the contents of your ukhas talk into an email?
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[13:16] <UpuWork> pretty much :/
[13:16] <UpuWork> people are too keen :)
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[13:17] <mattbrejza> tbh 16bit DAC seems a bit ott, but i guess if its cheap then it doesnt really matter
[13:17] <UpuWork> well
[13:18] <UpuWork> you're correct but I decided to start with the highest resoluton
[13:18] <UpuWork> and the price was good
[13:18] <UpuWork> £0 for 3 samples
[13:18] <mattbrejza> :P indeed
[13:18] <mattbrejza> tbh if you want the simplest solution, just get the raw module and pwm it
[13:19] <UpuWork> http://uk.farnell.com/linear-technology/ltc2606idd-1-pbf/dac-serial-16bit-5-5v-10dfn/dp/2294823
[13:19] <mattbrejza> the DAC means theres enough room for experimentation
[13:19] <UpuWork> well habduino is PWMing
[13:19] <UpuWork> but doesn't have the resolution (from Arduino) to do DomEx
[13:19] <mattbrejza> yea that DAC isnt exactly cheap
[13:19] <UpuWork> though I suppose you could mess with resistors
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[13:19] <mattbrejza> surely with a resistor divider you can get enough resolution?
[13:20] <daveake> That's the way I would go
[13:20] <UpuWork> no tried
[13:20] <mattbrejza> resoltion being the wrong word
[13:20] <mattbrejza> but w/e
[13:20] <UpuWork> it would be fixed though
[13:20] <UpuWork> i.e you can do DomEX16 (or8)
[13:20] <UpuWork> but not 22/4/11
[13:20] <mattbrejza> oh right
[13:20] <UpuWork> and I'm sure there is more to come from these
[13:21] <UpuWork> and other modes may need other steps
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[13:21] <UpuWork> so DAC's are probably the way to go
[13:21] <mattbrejza> for a dev board i guess so
[13:21] <UpuWork> yep
[13:21] <bertrik> about 5 pounds for the DAC isn't that expensive IMO
[13:21] <mattbrejza> http://uk.farnell.com/linear-technology/ltc2611cdd-1-pbf/ic-sm-dac-14-bit/dp/1330946
[13:22] <UpuWork> yep
[13:22] <mattbrejza> well you could get a whole radio and micro for <£5
[13:22] <mattbrejza> so i guess it depends what you compare to
[13:22] <bertrik> cost of a balloon, helium ,etc :)
[13:23] <UpuWork> personally I'd love a pico 1.8v that can do dominoex
[13:23] <UpuWork> which is where I'm going
[13:24] <UpuWork> but there are many other modes to be considered
[13:24] <mattbrejza> you could make a TCXO SI4600 module
[13:24] <UpuWork> especially with Dave sending images
[13:24] <UpuWork> sure we can do something with FEC modes to speed it up
[13:24] <mattbrejza> tbh i think we need to make our own modes
[13:25] <bertrik> UpuWork: if it's just a single frequency at a time, it's still doable with the "standard" radios, right?
[13:25] <mattbrejza> just need someone who wants to do a decent amount of c :P
[13:25] <UpuWork> yes bertrik
[13:27] <bertrik> I like C and I have plenty of time next week
[13:27] <UpuWork> go for it :)
[13:27] <mattbrejza> want to rewrite flidigi?
[13:27] <UpuWork> THOR
[13:27] <mattbrejza> (is what i had in mind)
[13:27] <bertrik> but I don't have hardware to test it on
[13:27] <UpuWork> work out how to do G-TOR for super nerd points
[13:27] <bertrik> I guess I can create a wav by software and play it back to dl-fldigi
[13:28] <UpuWork> (Thats what Voyagers 1&2 use)
[13:28] <mattbrejza> old tech :P
[13:28] <UpuWork> http://www.qsl.net/zl1bpu/MFSK/Technical.htm
[13:28] <UpuWork> I said nerd points :)
[13:28] <bertrik> mattbrejza: not old, "proven" technology :)
[13:28] <UpuWork> Still waiting on fsphil launching the first C-64 based teacker
[13:28] <UpuWork> tracker
[13:29] <UpuWork> I'd like to play with the THOR mode
[13:29] <mattbrejza> thor looks like domex
[13:29] <mattbrejza> whats the actual differences?
[13:29] <UpuWork> full time FEC
[13:29] <mattbrejza> (is it on this page im about to read...)
[13:29] <bertrik> ok, I'll have a go at THOR too
[13:30] <UpuWork> clue bertrik : get the source code for fldigi
[13:30] <mattbrejza> bearing in mind i have a java rtty decoder i guess its not that much effort to make a new mode
[13:30] <UpuWork> well I was talking to fsphil about making a custom modem for DominoEX HAB based round the minimum step size of an SI4060 with a 26Mhz crystal
[13:31] <mattbrejza> most of these ham modes are annoying due to lack of technical infrmation on them
[13:32] <UpuWork> yeah indeed
[13:32] <mattbrejza> dont suppose anyone knows how good the Vc pin of a TXCO is as far as domex shifts goes?
[13:32] <mattbrejza> it would mean that you dont need such a fine PLL
[13:33] <UpuWork> no idea not looked into it
[13:34] <mattbrejza> so you were thinking of doing what leo did and run a SI thing out of spec?
[13:34] <UpuWork> no
[13:34] <UpuWork> VCTCXO probably
[13:35] <mattbrejza> my guess is that the shift you get will vary from unit to unit
[13:35] <mattbrejza> but providing its temperature stable tjats all taht matters
[13:39] <Brew> apologies got called in for lunch with the kids, comedy. here's the screen grab https://www.dropbox.com/s/jlaz8j025sfap3h/dl-fldigi%20window.tiff
[13:41] <x-f> Brew, turn down the volume, it's way too loud, diamond on the right corner should be green
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[13:42] <x-f> do you see the signal on the waterfall, when it is transmitted?
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[13:44] <Brew> yes there is a burst https://www.dropbox.com/s/uu20vl53ckvn9zq/dl-fldigi%20window_burst.tiff
[13:46] <Brew> also now having slowed the baud rate i can here the data bust
[13:46] <x-f> try to get it in the middle of the waterfall, looks like you are not quite tuned to in it
[13:46] <x-f> (adjust the frequency in gqrx)
[13:49] <Brew> sting carrier now nearly in the middle of the water fall still no five :-(
[13:49] <Brew> sorry no dice :-(
[13:50] <x-f> an updated screenprint, please
[13:53] <Brew> https://www.dropbox.com/s/uu20vl53ckvn9zq/dl-fldigi%20window_burst.tiff
[13:53] <Brew> sorry https://www.dropbox.com/s/mku8rlxbztdpqyv/dl-fldigi_window2.tiff
[13:54] <x-f> is the transmission there?
[13:55] <daveake> Is SDR# in USB mode?
[13:56] <Brew> https://www.dropbox.com/s/ylw3kh3vd1gu3yr/dl-fldigi_window3.tiff
[13:57] <x-f> looks like LSB
[13:57] <daveake> Looks more like LSB
[13:58] <x-f> Brew, place the red marker above the red parts of the signal
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[14:00] <Brew> If I try an drag the two red markers they jump back in gqrx i have mode as LSB is that the problem?
[14:00] <daveake> Set to USB
[14:00] <x-f> disable AFC for now
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[14:06] <Brew> https://www.dropbox.com/s/8cimkvknaumyfr8/dl-fldigi_modem_settings.tiff is this all correct?
[14:09] <Brew> the adjust cursor frequency box only lets me get to 500 then drops back down to 425 this can't be correct?
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[14:28] <eroomde> pong Babs
[14:31] <Babs> Ta - I'm making a choice between stepper motors and brushless motors for my gimbal now I've got to the point when I can drive motors from the IMU
[14:32] <eroomde> uhuh
[14:32] <Laurenceb> id go for steppers
[14:32] <eroomde> i'd ignore laurenceb
[14:32] <Laurenceb> look up pancake steppers
[14:32] <Babs> There are examples of both on the market but I seem to remember that you and a couple of others had a dislike of stepper motors. Would that be applicable to my problem
[14:32] <Laurenceb> lol eroomde
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[14:32] <eroomde> yes, def applicable
[14:32] <Laurenceb> brushless is more appealing...
[14:32] <Laurenceb> but i suspect harder to make it work well
[14:33] <eroomde> steppers have discrete steps that they can rotate
[14:33] <Laurenceb> so do brushless
[14:33] <eroomde> e.g 1.8 degrees per pulse
[14:33] <eroomde> not really laurenceb
[14:33] <Laurenceb> not with microstepping
[14:33] <Babs> agreed, but apparently you can step down to 1/8 of a pulse movement
[14:33] <Laurenceb> brushless is just a stepper with huge steps
[14:33] <Laurenceb> and horrible nonlinearity
[14:33] <eroomde> that's a silly way of looking at it
[14:33] <Babs> and i am thinking for my purposes that would probably be ok?
[14:34] <eroomde> brushless make it a lot easier to model the motor as applying a torque
[14:34] <Laurenceb> do you have a stepper and a brushless on your desk right now?
[14:34] <Laurenceb> i do
[14:34] <eroomde> no, i have bits of rocket engine
[14:34] <Laurenceb> lol
[14:34] <Babs> i have a pie
[14:34] <iain_g4sgx> Another UBX/HABITAT question, I seem to be getting 7 decimal places on my GPS longtide and lat, I see most only have 6. Is 7 OK ?
[14:34] <eroomde> but proximity to them is not much to do with understanding them
[14:34] <Laurenceb> anyway
[14:34] <eroomde> i could drop both of them onto a baby
[14:34] <Laurenceb> its not like you cant try both
[14:34] <eroomde> the baby would not understand more than me about them
[14:35] <Laurenceb> pancake stepper wtf
[14:35] <Laurenceb> *ftw
[14:35] <Babs> So. Anyway. Is the only disadvantage of steppers a discrete rather than continuous movement?
[14:35] <Laurenceb> lol
[14:36] <Laurenceb> thats not true
[14:36] <Laurenceb> they are both continuous
[14:36] <Laurenceb> you have small stepping stepper == stepper
[14:36] <Laurenceb> or haxored huge stepping stepper
[14:36] <Laurenceb> == burshless
[14:37] <Laurenceb> one is bound to be less faff...
[14:37] <Laurenceb> only brushless motors have nice neodymium magnets
[14:37] <Laurenceb> so they tend to be lighter
[14:37] <LeoBodnar> stepper motor is massive power hog
[14:37] <Laurenceb> but with a bit of searching you can find good pancake steppers
[14:37] <Babs> ahh, Leobodnar, the voice of reason
[14:37] <Babs> an
[14:37] <Laurenceb> LeoBodnar: so is brushless
[14:37] <Laurenceb> you cant win
[14:38] <Laurenceb> theres no easy way out
[14:38] <LeoBodnar> brushless does not need power when there is no torque stepper always needs it
[14:38] <Babs> Laurenceb, can you come back on at 2300 when I've gone to bed?
[14:38] <Laurenceb> ok i wont offer advice
[14:38] <Laurenceb> byebye
[14:38] <Laurenceb> be back when it fails epically
[14:39] <Babs> I'm joking I'm joking, just looking for some simple words
[14:39] <Babs> ;-)
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[14:40] <Laurenceb> i guess the main issue is you cant use a stepper driver for a brushless motor
[14:40] <Brew> hi guys I'm still having bother getting dl-fldigi to dance if any one has any pointers?
[14:40] <Laurenceb> but then again there are stepper drivers off the shelf
[14:40] <Laurenceb> so easy to experiment
[14:40] <Babs> a) are they just as easy as one another to get to work (both seem to use control boards, although with steppers you can get away without them), I just don't know whether they are similar in terms of power consumption (all things being equal), or whether one is eminently more suitable than the other
[14:41] <Laurenceb> its a bit of a faff finding a suitable pancake stepper
[14:41] <Laurenceb> as they tend to be quite heavy
[14:41] <Babs> brushless seems light, although i am a bit confused why this one does not have a shaft http://quadcopters.co.uk/ld-power-2208-brushless-gimbal-motor-gopro-camera-size-769-p.asp
[14:42] <Babs> does just one part of the case rotate against the other or something?
[14:42] <eroomde> i like brushless ones because you can more of less give a torue to them
[14:42] <eroomde> which is what you naturally want to do from a control system pov
[14:42] <Laurenceb> http://uk.farnell.com/sanyo-denki-sanmotion/ss2421-5041/42mm-slim-pancake-stepper-motor/dp/1708572
[14:42] <Babs> as in define a uniform torque that they operate to?
[14:43] <Laurenceb> eroomde: yeah youd need to run variable current in a stepper
[14:43] <Laurenceb> which makes the driver faffy
[14:43] <Laurenceb> ^that farnell stepper seems suitable
[14:43] <Laurenceb> 70gram mass
[14:43] <Laurenceb> ~1Kgcm
[14:43] <LeoBodnar> On a good servo motor torque = Kt * current which makes PID control loop much easier
[14:43] <eroomde> not a uniform torque but that the control signal is a torque
[14:44] <eroomde> it's easy to map on the ideal mathematical model of a control system
[14:44] <eroomde> with steppers you have to start calculating velocities
[14:44] <eroomde> integration gives you phase lag
[14:44] <Laurenceb> you still need to track position with brushless
[14:44] <Laurenceb> to do the phasing
[14:45] <Laurenceb> http://www.pololu.com/catalog/product/1183
[14:45] <Laurenceb> im using those with my pancake steppers
[14:45] <Laurenceb> and F4discoveyr board
[14:45] <Laurenceb> *F3
[14:45] <Laurenceb> it has an imu
[14:46] <Babs> Laurenceb - do those stepper motors slip much when you are within the load guidelines?
[14:46] <Laurenceb> yes
[14:46] <Laurenceb> by 0.5degree or so
[14:46] <Laurenceb> like 0.01radians
[14:46] <Babs> over what time period. or is that 0.5 degrees full stop.
[14:46] <Laurenceb> erm
[14:46] <LeoBodnar> With brushless you must know the position of course
[14:47] <Laurenceb> thats the slip depending of the torque
[14:47] <Laurenceb> if you torque in one direction it might not be where it should be
[14:47] <HixWork> typical, this conv starts up and I have to leave. Logs it is then. later gents
[14:47] <Babs> as in it is an error that grows (ie continually slipping more and more), or just a limitation based on the teeth that drive it being of a certain width and not meshing perfectly?
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[14:48] <Laurenceb> no
[14:48] <Laurenceb> its a fixed limit
[14:48] <LeoBodnar> Also traditionally brushless motor (PMDC) means trapezoidal commutation and AC servo motor means sinusoidal one
[14:48] <Laurenceb> if you miss a step you can correct with the imu
[14:48] <Babs> ahh ok. so probably ok for my purposes.
[14:48] <Laurenceb> remeber its a closed loop control system
[14:48] <chrisstubbs> Brew, what exactly is the problem?
[14:48] <Laurenceb> im imagine 0.01radians is something you could like with
[14:48] <Laurenceb> *live
[14:48] <Babs> exactly.
[14:49] <LeoBodnar> Trapezoidal ones are difficult to control in torque mode, they are designed for cheap hall-sensor based drivers that commutate only on phase change thus a trapezoidally wound stator that produces trapezoidal back EMF
[14:49] <Laurenceb> with better balancing you can reduce that
[14:49] <Laurenceb> LeoBodnar: dual IMU may work
[14:50] <Babs> the alternative is to track positions with a brushless motor which presumably means something like running a pot alongside it, or a second IMU so you can use the first to measure absolute yaw, pitch and roll, and the second to confirm the relative position of one vs. the other
[14:50] <Laurenceb> so you know camera and mount attitude
[14:50] <Babs> Laurenceb. we got there at the same point.
[14:50] <Laurenceb> heh
[14:50] <Laurenceb> yeah then you would know where the brushless motors are and how to phase them
[14:50] <Laurenceb> but they still cog a lot and things
[14:51] <Laurenceb> i find them nasty, but the rc guys have got fairly good results
[14:51] <Babs> so how does this work with no second IMU present? http://www.rctimer.com/index.php?gOo=goodspic.dwt&goodsid=950
[14:51] <Laurenceb> theres heavy torque ripple too
[14:51] <eroomde> why do you need to track the position of the thing the gimbal is fixed to?
[14:52] <Laurenceb> Babs: its running them as steppers
[14:52] <eroomde> A: you don't
[14:52] <Laurenceb> eroomde: if you want to run them as steppers you dont need to
[14:52] <Laurenceb> your torque idea is cool
[14:52] <Laurenceb> but means you need to know phase well
[14:52] <Laurenceb> otherwise its just a huge ass stepper
[14:53] <eroomde> i was assuming feedback
[14:53] <Laurenceb> a case of open-loop versus closed-loop rotation feedback
[14:53] <Laurenceb> i think
[14:54] <Laurenceb> there is a third way
[14:54] <Laurenceb> build a neodymium stepper...
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[14:54] <Laurenceb> unfortunately not a sane route
[14:54] <Babs> eroomde. You don't if you put the IMU fixed relative to the camera, but then you have a load more faff because you not only have to locate the camera there, but also the electronics
[14:55] Action: Laurenceb heads off to do some work
[14:55] <Babs> If you are looking to pop all the electronics, battery etc. above the camera to be rotated, you need to be sure that what you are calculating to be the angle between the the electronics and the camera is the true angle
[14:56] <Babs> ie if it slips over time you might think you are levelling the camera, but you could actually just be ensuring it is at some unknown angle to the horizontal
[14:56] <Brew> chrisstubbs if you can see back to earlier to today I'm trying to send text from my Raspberry pi to dl-fldifi on my mac I have gprx working baud rate set to 300 on the pi settings in fldigi correspond to my best guess but I can't move the cursor frequency up to the peak on my waterfall
[14:56] <eroomde> yep, i was also assuming the imu is on the camera
[14:56] <eroomde> that's how i have it in mine
[14:56] <eroomde> conceptually*
[14:57] <Brew> it will go up to 501 then jump back to 446
[14:57] <Babs> my engineering hat then says that you have to work out a way of connecting the IMU to the rest of the set up without the potential to break wires by continually twisting as it moves, that kind of thing.
[14:58] <Laurenceb> Babs: most of the RC stuff is two axis
[14:58] <Laurenceb> and sidesteps that issue
[14:58] <Babs> I guess you would put the IMU on the camera and connect up wirelessly, which I've already done.
[14:58] <Laurenceb> aidsfruit sell slip rings
[14:58] <Babs> aidsfruit
[14:58] <Laurenceb> yes
[14:58] <Laurenceb> http://www.adafruit.com/
[14:59] <Babs> Then you've got to somehow put a motor inline with a slip ring, which is also a faff
[14:59] <Babs> (although granted it is a solution)
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[15:00] <eroomde> so on my design
[15:00] <eroomde> the whole platform yaws
[15:01] <eroomde> a subcradle does elevation and roll
[15:01] <eroomde> which are constrained
[15:01] <Babs> what does it yaw against?
[15:01] <eroomde> my latency is a bit high as i'm running sims on aws that need care and feeding
[15:01] <eroomde> a reaction wheel
[15:01] <Laurenceb> there is another way
[15:01] <chrisstubbs> Brew, is this the waterfall in dl-fldigi or gqrx?
[15:02] <Laurenceb> maybe the reaction wheel big enough and its passivly stable
[15:02] <Babs> so thats like my two body thing we discussed a couple of weeks ago.
[15:02] <Laurenceb> *make
[15:02] <Brew> dl-fldigi https://www.dropbox.com/s/ylw3kh3vd1gu3yr/dl-fldigi_window3.tiff
[15:02] <eroomde> i can't remember. there's a lot of rocket that uses up metal buffer in 2 weeks
[15:03] <chrisstubbs> Brew, not heard of that happening before. Do you have another pc you can test it on?
[15:04] <Babs> i have a brain that recalls everything. In terms of capacity, it is second only to my Mom's ability to recall the medical histories of her friends, each of which has to be related every time she mentions one of them.
[15:04] <Babs> "You remember Doreen, she was born with 3 ovaries" etc.
[15:05] <mfa298> Brew: it should be a case of just clicking in the middle of the two bits of red for of the transmission and the two vertical red bars should be close to the actual transmissions
[15:05] <Brew> I've another Mac I could try only have virtual PC's sadly.
[15:05] <mfa298> although it looks like dl-fldigi is set to 50bd
[15:06] <mfa298> You could try turning AFC off (bottom right) in case that's making it move
[15:08] <Brew> mfa298: if i try and drag it I get the same problem as clicking the fast forward or play arrow I get to 500 and it want's to jump back
[15:08] <Brew> afc is off
[15:08] <mfa298> Brew: just click in the waterfall
[15:09] <chrisstubbs> Brew, do you get two red lines centered around your cursor when you mouse over the waterfall?
[15:09] <Brew> stand by let me russle up a video
[15:11] <Willdude123> Hmm I really don't wanna unplug the BBB from the NTX2, took me ages to get that working. But I need to put it in a tin can to stop interference
[15:12] Nick change: Willdude123 -> Willdude123_BF3
[15:12] <mfa298> Willdude123_BF3: do you need to remove the NTX2 to test if shielding reduces gps interference ?
[15:13] <Willdude123_BF3> Yesh, I need to unplug from the BBB
[15:13] <mfa298> any reason why (will it not fit or similar ?)
[15:16] <Willdude123_BF3> Well, it's on a breadboard so might be a bit awkward.
[15:17] <Willdude123_BF3> Maybe I could design a breakout.
[15:17] <Willdude123_BF3> Then it'd be a bit easier to put in different places.
[15:17] <Willdude123_BF3> Anyway, as my nick suggests, I'm playing BF3/
[15:18] <mattbrejza> you must be dying lots if you have enough time to talk here :P
[15:18] <Willdude123_BF3> Haven't got a match yet
[15:18] <mfa298> Initially if I was in your situation I'd just see if I could shield the BBB and Bread board without unplugging stuff (or unplug the Bradboard if it was only a couple of connections
[15:19] <Willdude123_BF3> I wonder Hmm
[15:19] <Willdude123_BF3> I think hmm is my most used phrase
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[15:22] <Willdude123_BF3> man it's taking me ages to get a match
[15:22] <Laurenceb> http://imgur.com/a/VYsgP
[15:24] <Brew> oh re launch of dl-fldigi and now i can move it about still can't get it to say "hello world" though
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[15:34] <Willdude123_BF3> I really don't get BF3
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[15:36] <Brew> right so rebooted my carrier in the centre of the two red lines' not seeing 'Hello world" come out just gibberish
[15:38] <daveake> Did you switch SDR# to USB?
[15:39] <Brew> yes gprx now in USB mode
[15:39] <daveake> Also, you need to align the rightmost red cursor line to be on the carrier
[15:39] <daveake> then when the data appears, you'll have 2 yellow columns one over one red cursor line and the other over the other
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[15:41] <Brew> https://www.dropbox.com/s/u7s9hd2hi8ge813/gqrx.tiff gqrx
[15:42] <daveake> Need to see dl-fldigi
[15:42] <iain_g4sgx> Hi y'all. Another UBX/HABITAT question, I seem to be getting 7 decimal places on my GPS longtide and lat, I see most only have 6. Is 7 gonna be OK ?
[15:42] <daveake> yes
[15:43] <iain_g4sgx> thnaks
[15:43] <Brew> https://www.dropbox.com/s/u7s9hd2hi8ge813/gqrx.tiff
[15:43] <Brew> https://www.dropbox.com/s/64cgz3klrann1xs/dl-fldigi_window4.tiff
[15:45] <Brew> https://www.dropbox.com/s/yeuwzi2lrz9vbw8/pi_stty_settings.tiff
[15:45] <daveake> There's no data on that dl-fldigi screen
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[15:47] <daveake> Can you zoom in on the Gqrx waterfall? I can't tell what you're tuned into there.
[15:47] <eroomde> it's all been sucked up by the tiff
[15:49] <Brew> https://www.dropbox.com/s/13kez9fjmf6f5b8/gqrx2.tiff how's this?
[15:52] <daveake> No, I mean zoom in *in the program*, not zoom in to the screen :)
[15:52] <daveake> That waterfall is showing a huge range
[15:53] <Brew> not sure stand by I can hear a strong tone and when i run the echo command it does sound like dial up internet
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[15:58] <Brew> daveake: i don't believe I can unless any one else knows about gqrx?
[16:00] <iain_g4sgx> Zoom ongqrx is the center mouse wheel
[16:00] <iain_g4sgx> once cursor is over sig
[16:00] <iain_g4sgx> no keyboard equivalent which is a pain
[16:01] <Brew> scrolling up and down on my magic mouse or touch pad just moves the frequency up and down and the audio goes up and down in pitch
[16:02] <Brew> sorry stand by
[16:02] <iain_g4sgx> try when mouse cursor is over the x axis
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[16:06] <craag> yo daveake, check out my cake! http://t.co/jZKhn56EGm
[16:06] <craag> also mfa298 ^
[16:06] <Brew> yes id you scroll whilst above the axis not on the waveform you can scroll vertically and horizontally more detailed picture https://www.dropbox.com/s/50ehih5vt1hkn7q/gqrx3.tiff
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[16:06] <daveake> craag lol nice :)
[16:06] <mfa298> craag: nice :D
[16:07] <craag> Yummy chocolate as well :)
[16:07] <Brew> craag thanks for the email and nice cake!
[16:07] <craag> ah Brew hello!
[16:07] <craag> Sorry it took me a while to get back to you
[16:08] <Brew> that's cool, i've been getting a bunch of help off these folks in the mean time
[16:08] <craag> good stuff, how far have you got?
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[16:10] <jcoxon> morning
[16:10] <Brew> Raspberry pi, gps, NTX2 making noise and the Piface doing the automation control of the payload. just need to get the link to dl-fldigi to work and trigger my python scrips at set altitude.
[16:11] <Brew> craag: https://www.dropbox.com/s/0r1ig0jcpcljce6/WOW%20JBR%20Raspberry%20Pi%20Schematic.pdf
[16:12] <craag> Ah yes, the split tx/rx way.
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[16:12] <craag> Excellent!
[16:13] <Brew> spent the whole afternoon listening to tone and warbles hoping for "hello world" to appear but no dice so far
[16:15] <jcoxon> ping Upu
[16:15] <craag> You'll get there :)
[16:16] <craag> The sound of RTTY is suddenly very satisfying when it's working!
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[16:16] <Brew> it's driving me insane at the moment
[16:16] <jcoxon> and then you start hearing it in the white noise
[16:17] <craag> yep! Like hearing voices in the wind after VHF field day...
[16:18] <Laurenceb> http://s3-ec.buzzfed.com/static/enhanced/webdr02/2013/8/12/15/enhanced-buzz-32597-1376335518-45.jpg
[16:18] <Laurenceb> http://i.imgur.com/9oqT9J0.jpg
[16:18] <jcoxon> shall i clear the tracker
[16:20] <Brew> does everyone find it this difficult or am I just better off doing something else?
[16:21] <Brew> Right I'm going for some tea then I'll get back to this if anyone has any pearls of wisdom in the mean time to make it work there's chocolate in it for you
[16:22] <mfa298> Brew: it might be worth recording a few bits of audio output from your test transmissions. Then some of us here can try decoding it as well.
[16:22] <bertrik> if you have an SDR stick with an e4000 tuner, don't tune it exactly to the RTTY frequency, but a bit to the side of it. Then, in gqrx, select the signal.
[16:23] <bertrik> also, if USB doesn't work, try LSB mode, or vice versa
[16:24] <bertrik> and don't set the SDR sampling frequency too high, 1 MS/s should be fine for most things
[16:24] <iain_g4sgx> check 8 or 7 bit is set of course. I forget its seven normally
[16:25] <bertrik> and disable squelch in the SDR application and in dl-fldigi
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[16:34] <Steve_2E0VET> ping Upu
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[17:08] <Lunar_Lander> hello
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[17:10] <charolastra> Laurenceb: http://global3.memecdn.com/i-like-you-come-over-to-my-house-and-fuck-my-sister-wait-what-o-o_o_1016722.jpg
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[17:26] <Hiena> Muahahahaha...I got 100 little bodybags. Kid size.
[17:26] <Hiena> Well, just kidding.
[17:27] <Hiena> More seriously, anybody knows a good duck antennae design for a 6 meter HAM band?
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[17:27] Nick change: [1]iain_g4sgx -> iain_g4sgx
[17:27] <Hiena> Or any wide band mobile design?
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[17:35] <Hiena> Never ming, just found a good article:
[17:35] <Hiena> http://users.belgacom.net/hamradio/schemas/on6mu_vhfrubberduck.htm
[17:35] <Hiena> I'll redesign to 6m.
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[17:44] <iain_G4SGX> Sorry for all the dumb questions guys, but how many sats on the MAx6 would constitute a good enough lock to stick on the telemetry string. ?
[17:45] <iain_G4SGX> Or is there a better measure of quality?
[17:49] <SpeedEvil> estimated position error
[17:49] <daveake> 4
[17:51] <iain_G4SGX> ta, think ill go for the 4 option. Easier to code.. Tnx
[17:52] <numebr10> or you can look at the navigation status for 3D
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[18:04] <iain_G4SGX> Looking at the data the gpsFix value on NAV-SOL is a good indication of a fix, as you may have sats but no fix. Think I'Il go for both, why not ? lol
[18:07] <Hiena> Bleh, my FFT math failed again....
[18:11] <Hiena> I need filter two tone in the audio channel to decode the telemetry data, but the video compression kills it.
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[18:12] <mattbrejza> youre trying to filter audio using a fft?
[18:14] <Hiena> Yup. Trying to find the peaks, but the compression inject extra ones and one of them mask the second tone.
[18:15] <mattbrejza> o hright
[18:16] <Hiena> Guess i'll go back the finding the zero crossing points and calculating the distances and counting it.
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[19:18] <jcoxon> evening all
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[20:00] <KT5TK_QRL> Is there anybody in the UK who needs electronic parts or similar from the USA (that might not be available in Europe)?
[20:00] <KT5TK_QRL> I could order some parts at Mouser or at digikey and bring them to the UKHAS conference.
[20:01] <eroomde> nice. you could be the spark fun costoms avoider of choice :)
[20:01] <eroomde> customs*
[20:01] <KT5TK_QRL> Yes, if you need something from Sparkfun, let me know
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[20:08] <Brew> Evening all I'm back with my sorry tale of not been able to get rtty into my mac from my PI here is a sample of the audio http://brewpse.co.uk/raspberrypi/RTTY%2050kps.aif and screen shots http://brewpse.co.uk/raspberrypi/gqrx4.tiff http://brewpse.co.uk/raspberrypi/dl-fldigi_window5.tiff http://brewpse.co.uk/raspberrypi/dl-fldigi_modem_settings1.tiff i'll send chocolate to whoever can make it work for me.
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[20:12] <x-f> Brew, your shift in dl-fldigi is set too narrow
[20:13] <x-f> it was fine in the afternoon screenprints - 600 Hz?
[20:13] <x-f> the red vertical lines need to be place above red parts on the signal
[20:13] <x-f> the thich red continuous line is the carrier
[20:14] <x-f> and then there is another one shorter on the left
[20:14] <x-f> thick*
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[20:14] <mfa298> I can get a decode with 50bd, 400 shift, 7n2
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[20:14] <mfa298> Brew: ^^
[20:15] <mfa298> thats from your aif file
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[20:15] <mfa298> although ideally you want to tune gqrx so that the signal is nearer the middle of the dl-fldigi waterfall
[20:15] <Brew> mfa298 grand so what I sending is good thanks
[20:16] <mfa298> Assuming you're sending "Hello World"
[20:16] <Brew> x-f shift now set to 425 left red line above the carrier still no dice :-(
[20:16] <mfa298> if you're sending something else it's not decoding properly
[20:17] <x-f> set it to 400 as mfa298 says
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[20:19] <Brew> i now have a custom shift of 400 and I'm playing the aiff into fldigi no gqrx and still no text
[20:19] <Brew> mfa298 would you be so kind as to send me a grab of your rtty settings window?
[20:21] <mfa298> will have to set up again. But setting what I gave above shoudl be the key things
[20:21] <x-f> it's decoding here too, "Hello World"
[20:21] <Astrobiologist> I have got Morse on the brain. Dit Dat for iPhone, devilishly addictive
[20:22] <Brew> https://www.dropbox.com/s/5ekskkv0ot6u42e/dl-fldigi_window6_loop.tiff is the window and no text
[20:22] <Brew> it can't be just a mac thing?
[20:22] <Lunar_Lander> Randomskk, are you there?
[20:23] <mfa298> Brew https://dl.dropboxusercontent.com/u/14636926/Brew-dl-fldigi.jpg
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[20:26] <Brew> boys boys boys! dam it i have to put the right hand red marker on the carrier and now it just keeps printing out oh happy days right who wants chocolate?
[20:26] <x-f> Brew, put both thin red lines above both thick red parts of the signal on the waterfall
[20:26] <x-f> good
[20:26] <Brew> how do you control the spacing between the two red marks
[20:26] <Brew> ?
[20:26] <x-f> it's the shift
[20:26] <mfa298> The spacing is the shift value
[20:27] <mfa298> so should be similar to what you worked out for your resistor values.
[20:29] <Brew> ah that's where it comes from brilliant, right then next stop get the gps to out out it's coordinates any one want to make that easy for me?
[20:30] <mfa298> Are you using python ?
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[20:32] <Brew> I'm proper new and python is all i've played with so far all the code on the wiki i've found so far has been for C
[20:33] <mfa298> If you're new to programming then python is probably the way to go, and it should be pretty easy to parse the NMEA strings from a gps
[20:33] <mfa298> The only python I've got experience is helping others debug code so I can't help much with getting started, I tend to use perl/C/C++
[20:34] <Geoff-G8DHE> Your aware of how the NMEA lat and Long numbers are configured ?
[20:35] <Brew> From what I've read so far i need to 'get' the coordinates from the NEMA parse them via a python script to 'send' over the UHF.
[20:35] <Brew> Geoff-G8DHE: not yet but I'm picking this all up fairly quickly
[20:36] <Geoff-G8DHE> Yes, but but the numbers are DDDMM.mmmm from memory (not sure how many digits after the decimal point.
[20:36] <mfa298> that's a pretty good summary.
[20:36] <DrLuke> anybody got an idea how to move a polygon from the top layer to any other non-copper layer in eagle?
[20:37] <mfa298> My standard advice is build up the code slowly, Start reciving NMEA sentences, Then parse out the sentence you need (GPGGA), then get the bits of data out from that sentence that you need
[20:37] <DrLuke> it's one of those things that relaly pisses me off with eagle
[20:37] <DrLuke> the assumption that I wouldn't want to move a copper polygon to another layer
[20:37] <DrLuke> outrageous
[20:37] <mfa298> you might also want one of the other sentences early on to get the date so you can set the system date/time (without internet the pi won't know what time it is)
[20:40] <Brew> mfa298 i've got the uBlox talking to the pi and can get date and time from it, i can also run cgps -s to see the lat and long so i'm probably 30% the way there given how today went :)
[20:42] <craag> Yep you can connect to gpsd quite easily to grab lat, lon, altitude, date, etc
[20:43] <Brew> any recommendations on baud rate for the Pi i read something about having to swap as the GPS is fixed at something and they are sharing the port?
[20:43] <mfa298> ah right, others have opened the gps device in their python program and manually read the data themselves
[20:43] <craag> Ah yeah you can't use gpsd with that method
[20:44] <craag> As you need to stop talking to the GPS (9600 baud), and re-open the port at 50baud to talk to the NTX2.
[20:44] <Brew> i didn't think it would be that easy, I guess gpsd is just a gps-display
[20:44] <mfa298> what others have done is open the serial port at 9600bd, read in some gps data, close the serial port and then open it at 50/300 and sent data via the ntx2
[20:45] <Brew> mfa298: that's what i assumed i would have to do, not quite sure how yet.....
[20:46] <mfa298> you can probably find other peoples code on github
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[20:50] <Brew> cool i'll go have a look thanks for all your help guys, I'll shout some chocolates for the 7th september
[20:50] <daveake> <Brew> boys boys boys! dam it i have to put the right hand red marker on the carrier and now it just keeps printing out oh happy days right who wants chocolate?
[20:50] <daveake> [15:39] <daveake> Also, you need to align the rightmost red cursor line to be on the carrier
[20:51] <daveake> Glad you got there ;)
[20:51] <Lunar_Lander> hi dave
[20:51] <Lunar_Lander> you'll fly this weekend if I read it right?
[20:51] <daveake> wrong LL
[20:51] <daveake> next weekend
[20:51] <daveake> Too much rain and wind this weekend
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[20:52] <mfa298> We're back to a typical English Summer
[20:53] <Brew> daveake sorry i got my left and right the wrong way round! as comedy as me blowing my nose eh?
[20:54] <daveake> :)
[20:55] <Lunar_Lander> ah
[21:02] <cm13g09> mfa298: just read the traceback... your choice of programming languages....
[21:03] <cm13g09> hmm....
[21:03] <Brew> Happy me https://www.dropbox.com/s/610xvrxtxsvdsly/video_16092013_rtty_working_sm.mov thanks guys that's me done for the day
[21:03] <mfa298> Nothing wrong with them. I also use PHP, although I'm not so sure that would be suitable for a tracker
[21:04] <cm13g09> lol yeah
[21:04] <cm13g09> no, for trackers
[21:04] <cm13g09> C/C++ are your friend
[21:04] <cm13g09> (or assembler if you're a PIC fanatic....)
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[21:05] <craag> javascript :)
[21:06] Action: craag has pretty much written a tracker in javascript for work..
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[21:13] <cm13g09> lol, evening craag
[21:13] <craag> evening cm13g09
[21:13] <craag> how are things?
[21:14] <cm13g09> yeah
[21:14] <cm13g09> busy as always
[21:14] <cm13g09> becoming a regular customer of Hackvana.....
[21:14] <Lunar_Lander> hello craag :)
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[21:15] <craag> Evening Lunar_Lander
[21:16] <Lunar_Lander> how's life?
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[21:18] <craag> Not bad, english weather is back, looking forward to the conf :) You?
[21:18] <Lunar_Lander> yea learned KiCAD partially this week
[21:18] <Lunar_Lander> have to get into gear writing the B.Sc. thesis
[21:20] <craag> Cool
[21:20] <craag> What is your thesis on?
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[21:33] <Lunar_Lander> craag, a sample delivery system for an EPR spectrometer
[21:33] <craag> Oh right, interesting stuff!
[21:35] <Lunar_Lander> yeah
[21:35] <Lunar_Lander> :)
[21:36] <Lunar_Lander> just have to write it all down
[21:36] <craag> Always the most painful part of the project..
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[22:02] <Lunar_Lander> craag, yea
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[22:15] <cm13g09> well craag, a productive evening in my camp....
[22:15] <cm13g09> some more software written
[22:15] <Steve_2E0VET> Upu, ping
[22:15] <craag> cm13g09: Good to hear.
[22:16] <Steve_2E0VET> how many AA batteries do people use for the arduino uno
[22:19] <mattbrejza> assuming linear reg, 3 for 3.3V tracker, 4 for 5V tracker
[22:19] <mattbrejza> can get away with AAA though
[22:20] <Steve_2E0VET> i am using 8 but the voltage is down to 8.5v and the gps is unreliable
[22:21] <mattbrejza> :/
[22:21] <Steve_2E0VET> it works for 30secs or so then just produces junk, if i unplug and plug back in its ok for another 30secs
[22:22] <mattbrejza> are your batteries dead?
[22:23] <Steve_2E0VET> well 8 should be 12v, and they are down to 8.5 so i presume its possible
[22:23] <mattbrejza> what are they under load?
[22:23] <Steve_2E0VET> dont really want to put it on my psu as i fried an arduino this afteroon lol
[22:23] <Steve_2E0VET> good question
[22:24] <Steve_2E0VET> 3.5v lol
[22:24] <Steve_2E0VET> cheapo batteries
[22:25] <mattbrejza> dont arduinos run off USB?
[22:27] <Upu> evening
[22:27] <Steve_2E0VET> yes they should
[22:27] <Upu> if you're going from the on board Arduino reg I'd use 5
[22:28] <Upu> 4 is too marginal
[22:28] <Upu> this is why I put a step up on Habduino
[22:28] <Steve_2E0VET> i was using 8
[22:28] <Upu> 8 ?
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[22:28] <Steve_2E0VET> yep
[22:28] <mattbrejza> is the on board reg a bit crappy?
[22:29] <Steve_2E0VET> mines dead now lol
[22:29] <Upu> its not great
[22:29] <Upu> 12v shouldn't fry it
[22:29] <Upu> its 7-20v
[22:29] <Steve_2E0VET> it has been getting hot all day
[22:29] <Upu> you can feed 5V in to VIN
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[22:30] <Steve_2E0VET> think my problem is the batteries only 3.5v under load
[22:30] <Steve_2E0VET> off to buy pizza and more batteries
[22:30] <Upu> ok :)
[22:31] <fsphil> pizza solves many things
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[23:15] <Willdude123_BF3> Hmm just seeing how much cheaper vps's are nowadays this seems to good to be true, and I doubt it is. https://my.iperweb.com/cart/
[23:15] Nick change: Willdude123_BF3 -> Willdude123
[23:16] <Willdude123> Pretty sure I paid more than that for a 1gb one
[23:17] <SpeedEvil> You need to investigate who they are. In some cases it can be literally a guy with a rack of servers in his basement.
[23:19] <SpeedEvil> I kinda want a tiny server somewhere
[23:19] <mfa298> often you get what you pay for. I've got a couple of cheap vpss where the company generally needs prodding a few times a year as things break. I've got another one that costs a bit more but I think I've raised 2 tickets in >5 years
[23:19] <SpeedEvil> But more along the lines of a raspberry Pi.
[23:19] <SpeedEvil> For rather less than that per year
[23:20] <mfa298> SpeedEvil: I came accross one hosting place that you pay a setup fee and send them your pi and that's all the cost there is
[23:20] <Willdude123> Got a pretty good one that I'm admittedly only using as a bnc
[23:21] <Willdude123> 128mb £12 a year
[23:21] <mfa298> also openVZ allows the systems resources to be oversold (working on the principle that noone uses all that they buy), with something like Xen if you ask for 512mb ram you have 512mb of ram and no one else can use it
[23:21] <Willdude123> The irony is the name is actually Overzold
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[23:22] <SpeedEvil> mfa298: They are overcommitted though
[23:22] <SpeedEvil> mfa298: and they've basically stopped doing it
[23:22] <Willdude123> Hmm moving vpses to different nodes.
[23:22] <Willdude123> Doesn't sound a good idea.
[23:23] <Willdude123> Anyway, apart from minecraft, I have no reason to want a powerful vps
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[23:25] <Willdude123> Hmm. Might experiment with tin canning tomorrow
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[23:26] <Willdude123> Seems a bit of a faf though
[23:27] <SpeedEvil> It is.
[23:27] <SpeedEvil> RFI is annoying.
[23:27] <mfa298> you mean trying shielding the BBB to see if it makes the gps work better ?
[23:27] <Willdude123> Yeah
[23:27] <mfa298> simple tests shouldnt be that much faff.
[23:28] <mfa298> I'd probably start off with a bit of tin foil or an old foil tray and an aligator clip on a short bit of wire to ground it
[23:29] <Willdude123> Because I know keeping it at a distance, does make it work so I'm not too sure what there is to test, I'm not excatly gonna fly a payload (well I'm not gonna fly a payload ever but that's not the point) with a tin can in it
[23:30] <Willdude123> I've never really understood grounding properly
[23:31] <mfa298> it helps prove the bbb was causing interference and if it works will provide a basis for setting it up so you can run the gps with the bbb
[23:32] <SpeedEvil> A properly wrapped bit of foil/foam may work - if weight is a concenr.
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[23:36] <mfa298> For testing RFI issues that's how i might start off as it's cheap and easy, and then look at better solutions if it helps.
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[23:39] <Willdude123> After I've done the tests I'll stop working with breadboards and get started on PCB design because I can't stand working with a breadboard for much lomger.
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[00:00] --- Sat Aug 17 2013