highaltitude.log.20120621

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[07:22] <gonzo_> Anyone have the correct email for notam applications. The ausops@dap.caa.co.uk one bounces.
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[07:27] <daveake> Try ausops@caa.co.uk
[07:29] <griffonbot> Received email: Neil Baker "Re: [UKHAS] Launch location checks before applying for a NOTAM"
[07:51] <griffonbot> Received email: SP9UOB "[UKHAS] Launch 23.06.2012 Gliwice glider airport / Poland"
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[11:26] <cuddykid> UpuWork: all sorted - I created a CNAME record for a subdomain and then directed it to my free dynamic dns domain :) ssh is working :D
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[11:53] <UpuWork> So I don't have to do anything cuddykid ? result :)
[11:55] <cuddykid> UpuWork: nope :D
[11:55] <cuddykid> works well :)
[11:55] <cuddykid> the usb sound card device thingy has just come, feels rather cheap lol - time to test
[11:57] <cuddykid> has a rather annoying red light flash
[11:58] <UpuWork> oh yeah they rock
[11:58] <UpuWork> quality bits of kit
[11:59] <fsphil> they do the job
[11:59] <fsphil> just don't put any weight on them
[11:59] <Upu> or drop a screw driver on them
[11:59] <joph> cuddykid, get a wire cutter :D
[11:59] <cuddykid> doesn't really fit in my usb port properly because it's so fat - goes in at an angle
[11:59] <cuddykid> haha yeah joph
[12:00] <joph> or tape
[12:01] <joph> i hate these manufactors who produce devices with bright blue leds in the front
[12:01] <daveake> Chop it off;save the Earth
[12:01] <cuddykid> http://i.imgur.com/nzLmZ.jpg
[12:02] <daveake> Get some USB extension leads
[12:02] <daveake> Very handy sometimes
[12:02] <cuddykid> good idea
[12:02] <joph> just get 10pcs for a few bugs out of china :D
[12:03] <UpuWork> that looks good coming out of a Mac lol
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[12:05] <cuddykid> hmm, github download running at 2kb/s :S
[12:05] <cuddykid> taking 30mins to download fldigi!
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[12:05] <fsphil> our whole internet is a bit slow today
[12:05] <fsphil> and we've three lines
[12:05] <UpuWork> I blame the chinese
[12:05] <Laurenceb> some tripped over a cable
[12:06] <UpuWork> if they stopped constantly trying to login to my servers as root or accounts it would free up some traffic
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[12:09] <cuddykid> lol
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[12:18] <joph> Upu, portknocking or other port ;)
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[12:22] <WillDuckworth> Upu - can't believe your tutorial on the wiki is a year old
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[12:30] <fsphil> spent all morning thinking it was Wednesday. Weird when that happens
[12:31] <cuddykid> yay, decoding on MAB
[12:31] <cuddykid> *MBA
[12:31] <cuddykid> using the £1 usb sound card :P
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[12:32] <gonzo_> How much. You were overcharged
[12:33] <gonzo_> take care with little USB dongles, they can have some odd potentials on the outputs and the griounds
[12:33] <cuddykid> overcharged by 99p :)
[12:33] <gonzo_> I've seen them with the headphone out ground at +5v
[12:33] <daveake> I touched an odd potential and got over-charged
[12:33] <cuddykid> ouch
[12:33] <UpuWork-> so much hate for the 3D-o-tronic 2000 sound cards
[12:33] <cuddykid> lol
[12:33] <gonzo_> Is that the current topic....
[12:34] <daveake> it won the volt
[12:34] <cuddykid> might get another incase this one decides to pack up during chase
[12:34] <daveake> Get an ezcap; you know it makes sense
[12:35] <cuddykid> daveake: being on mac is my problem though
[12:35] <UpuWork-> yeah they don't work on Mac
[12:36] <cuddykid> haven't really got enough space to install a linux partition either :(
[12:36] <UpuWork-> :)
[12:36] Nick change: UpuWork- -> UpuWork
[12:36] <cuddykid> tempted to get one and set up a permanent base station here using the new server :)
[12:37] <cuddykid> UpuWork-: they work on linux ok?
[12:37] <UpuWork> sure if you like making life hard for yourself
[12:37] <cuddykid> lol
[12:37] <UpuWork> I believe they do
[12:38] <UpuWork> you'll just probably have to compile something somewhere and location 27 missing lib.so.6 to get it working
[12:38] <UpuWork> or is that Eagle ?
[12:38] <eroomde> i thought ezcap did work on a mac
[12:38] <UpuWork> I'm being facetious sorry
[12:38] <eroomde> you're lucky we're so nice to you
[12:38] <Darkside> they work on a mac
[12:39] <Darkside> just there isnt much software out there that compiles nicely on a mac
[12:39] <UpuWork> I think it was the SDR software that wouldn't compile
[12:39] <Darkside> you can use gnyradio itself just fine
[12:39] <UpuWork> if you work it out please do add it to the Wiki article
[12:39] <Darkside> i'm waiting for gqrx to be fixed
[12:39] <cuddykid> ooo, I might get one then :)
[12:39] <Darkside> they need to remove the pulseaudio dependency
[12:39] <UpuWork> I would get one as I've noticed the price is slowly going up
[12:40] <cuddykid> is it a necessity to get the pre-amp or would it work okish without?
[12:40] <Darkside> cuddykid: it may work without
[12:40] <cuddykid> thanks
[12:40] <Darkside> we haven't fully tested one with yet
[12:40] <UpuWork> People are now selling the dongles as SDR's :
[12:40] <Darkside> but you're not going to get it working on OSX easily
[12:40] <UpuWork> http://www.ebay.co.uk/itm/EZCAP-668-DVB-T-USB-stick-SMA-Pigtail-Elonics-E4000-RTL2832U-for-RTL-SDR-/130693419391?pt=UK_Computing_Video_Capture_TV_Tuner_Cards&hash=item1e6def517f
[12:40] <eroomde> Darkside: is there a guide on replacing the coaxial connector with something more sensible or do you just do it?
[12:40] <Darkside> i just do it
[12:40] <eroomde> ok fine
[12:40] <eroomde> will do same
[12:40] <Darkside> desolder the PAL connector, solder on an edgemount SMA
[12:40] <Darkside> a looooong edgemount SMA
[12:41] <eroomde> can you open the case up non-destructively?
[12:41] <UpuWork> I have some long edge mounts
[12:41] <Darkside> yes
[12:41] <UpuWork> yeah
[12:41] <UpuWork> it pops open
[12:41] <eroomde> UpuWork: cool, can a purchase a ongie off you?
[12:41] <eroomde> infact longie*
[12:41] <eroomde> woah hang on
[12:41] <eroomde> ignore that
[12:41] <UpuWork> I'll let you know when they turn up if they fit
[12:41] <eroomde> i have a farnell account
[12:41] <UpuWork> http://imgur.com/a/mHpwP
[12:41] <eroomde> i must rmember that P&P is not as issue in my life now
[12:41] <Darkside> you want one with a wide footprint
[12:41] <eroomde> it's a whole new way of thinking and i still haven't adjusted
[12:41] <UpuWork> someone did that
[12:42] <Darkside> thats the other way of doing it :P put it in a box
[12:42] <UpuWork> not sure why they didn't put the connectors in the ends but hey ho
[12:42] <eroomde> i might box mine
[12:42] <eroomde> for outside use
[12:42] <UpuWork> I think I'm going to box mine, I have a plastic Hammond enclosure lying about
[12:43] <Darkside> plastic won't do
[12:43] <Darkside> unless its conductive plastic
[12:43] <UpuWork> As opposed to what its in at the moment ?
[12:43] <eroomde> yeah, metal will give a lot of advantages
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[12:43] <UpuWork> ok
[12:43] <UpuWork> I'll find a metal one
[12:43] <Darkside> you want the shielding
[12:44] <eroomde> sure but the criteria for its design at the moment was 'how do we save 5c' not 'how do we make it work better'
[12:44] <UpuWork> just need to find a USB connetor
[12:44] <eroomde> the bulgin ones are nice
[12:44] <eroomde> i think that's what's in that photo
[12:44] <eroomde> panel mount with a screw housing that is ip-67
[12:44] <eroomde> means you could put it on a car roof in the rain
[12:44] <UpuWork> yes it is
[12:44] <UpuWork> http://uk.farnell.com/bulgin/px0443/usb-type-b-receptacle-panel/dp/1229685
[12:45] <UpuWork> than an SMA with a pigtail
[12:46] <UpuWork> think the metal case will make a big difference then ?
[12:46] <Darkside> maybe
[12:46] <Darkside> problem is noise will get into the radio via usb
[12:47] <cuddykid> anyone interested in buying one of those EZCAP dongles? 3 or more and get a discount, I think I'll place an order for one
[12:47] <Darkside> and well, you can't isolate the USB and radio sides, since they;re on teh same chip
[12:48] <eroomde> better than its only usb noise
[12:48] <eroomde> that*
[12:48] <Darkside> mm
[12:48] <Darkside> anyway
[12:48] <Darkside> eroomde: if you can strip out the pulseaudio dependencies from gqrx i will love you long time
[12:48] <eroomde> i don't think i want to?
[12:49] <eroomde> ?
[12:49] <Darkside> its kind of weird, it really should be using the gnuradio audio sink
[12:49] <Darkside> if it used that, then it'd be crossplatform
[12:50] <cuddykid> Darkside: is it getting the EZCAP working with gnu radio that is the hard part?
[12:50] <fsphil> the odler versions of gqrx used alsa dirctly, so it's going the right way
[12:50] <Darkside> cuddykid: well theres that
[12:50] <Darkside> then you have to make a SSB demodulator chain
[12:50] <Darkside> its not plug and play
[12:51] <Darkside> not by any means
[12:51] <cuddykid> okies
[12:51] <fsphil> how difficult is mac audio out?
[12:51] <fsphil> I mean, can we fix gqrx ourselves, get it pushed upstream?
[12:51] <Darkside> i dont think it will
[12:52] <Darkside> he has plans
[12:52] <Darkside> the guy that devs is is going to add gr-audio support back in, he just hasn't done it yet
[12:52] <fsphil> ah
[12:53] <Darkside> apparently HDSDR can run on mac within wine
[12:53] <Darkside> using balint seebers network server thing
[12:53] <Darkside> BorIP i think it is
[12:54] <fsphil> hdsdr runs on linu/wine
[12:54] <fsphil> now at least, it didn't used to
[12:54] <fsphil> use*
[12:54] <Darkside> yeah
[12:54] <Darkside> i need to get that working at some point
[12:55] <Darkside> as that would be far easier than booting up a windows VM..
[12:55] <fsphil> wine's pulseaudio drivers are pretty awful, which made it very difficult to use any windows sdr software on my machine
[12:56] <fsphil> hence my love of gqrx:)
[12:56] <Darkside> its interesting, wines audio support on OSX is brilliant
[12:56] <Darkside> everything works
[12:56] <fsphil> wine with alsa works well, but that locks the sound card
[12:56] <fsphil> can't use dl-fldigi to record the output
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[13:41] <Laurenceb> http://kernelhacks.blogspot.co.uk/2012/06/arch-linux-on-wm8650-netbook.html
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[13:43] <fsphil> just reading that
[13:43] <fsphil> they're dirt cheap
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[13:51] <WillDuckworth> how is arch linux?
[13:51] <WillDuckworth> never tried that one
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[13:51] <BrainDamage> it's rather manual installation
[13:51] <BrainDamage> but unlike gentoo, it has binary packages
[13:52] <fsphil> gentoo has binary packages too
[14:06] <BrainDamage> they are a tiny fraction
[14:06] <BrainDamage> all the core and most of the packages in arch are binary
[14:06] <BrainDamage> and you use automated compile for niche programs / bleeding edge
[14:07] <fsphil> gentoo on an arm machine does seem a bit .. drastic
[14:07] <Elwell> s/ on an arm machine//
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[14:26] <fsphil> hah
[14:27] <fsphil> I did Linux From Scratch once, at least that's educational
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[14:48] <eroomde> i just recompiled the kernel for pi
[14:48] <eroomde> well, i did it yesterday
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[14:48] <eroomde> the way they have set up the iso image file in the sd is rather nice
[14:48] <eroomde> you can kinda just splice it in to replace an existing one
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[15:02] <cuddykid> daveake: what PC do you have currently in for your "car PC"?
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[15:03] <daveake> It's home made, using a mini-ITX motherboard with a case and PSU designed for car use
[15:03] <cuddykid> nice :) thanks
[15:04] <cuddykid> it's a great piece of kit
[15:04] <daveake> Have a look at http://linitx.com/ and http://www.mini-itx.com/default.asp
[15:04] <cuddykid> cheers :)
[15:04] <daveake> Has a touchscreen monitor which is vital
[15:05] <cuddykid> yep
[15:05] <cuddykid> I was thinking about getting one of those cheap android tabs
[15:05] <daveake> Well you need something that runs dl-fldigi
[15:06] <daveake> We have a Samsung Tab 10.1 which Julie uses to watch the map
[15:06] <cuddykid> good point
[15:06] <daveake> That's handy thought spacenear isn't great on it
[15:06] <daveake> -t
[15:37] <gonzo_> I have a 12v ruggedised display with an itx board in, did think of doing a car PC, but really a laptop is generally more flexible and compact
[15:39] <daveake> Cheaper too probably. The car pc does have some advantages. It's built-in (ish) so it's there all the time; the power supply is designed for car use so it auto starts up with the ignition and shuts down a set period after (settable by jumpers on the PSU)
[15:40] <daveake> Audio out goes into the car stereo so it doubles as an expensive mp3 player. Or I suppose I could listen to rtty as I drive ...
[15:40] <daveake> Now my second pi has arrived, I supposed I'd better fire up the first one :p
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[15:46] <WillDuckworth> where's my pi!?!?
[15:48] <r2x0t> exactly my thoughts... second pi?! still waiting for a first one! ordered it 2 months ago ffs
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[15:51] <fsphil> I can't even order a second one
[15:52] <daveake> Well I ordered one from RS and one from Farnell :)
[15:52] <eroomde> daveake: those renaults (i have since found out0 infact have 2 terminals under the bonnet for battery
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[15:52] <eroomde> even if the battery is not physically located there
[15:52] <daveake> How does that help us with Julie's Citroen? :p
[15:52] <eroomde> so no need o faff with the passenger seat
[15:52] <eroomde> oh citroen then
[15:52] <daveake> :)
[15:52] <eroomde> whatever they're called
[15:53] <daveake> I shall take a look, tvm
[15:55] <daveake> Well according to the interweb it does have such terminals. Who'd have thunk it?
[15:56] <jonsowman> i avoid wiring stuff directly to the battery
[15:56] <daveake> Silly Win32DiskImager (as needed for getting the pi image onto the SD card) doesn't understand UNC paths. Remind me, it is 2012 now isn't it?
[15:56] <jonsowman> engine bay fusebox tends to be better
[15:58] <daveake> Oh, I've not wired anything direct to it ... I had to jumpstart the car after one launch
[15:58] <daveake> Drained the battery with all the connected kit
[15:58] <jonsowman> hehe
[15:58] <daveake> (I left it all running for a few hours)
[15:59] <daveake> Those cheap sealed LA batteries are going in the back of the Pug to run the car PC
[15:59] <jonsowman> are you charging them from the car?
[16:00] <daveake> That's the intention
[16:00] <jonsowman> the 406 has an "engine running" relay that you could use to make sure the charger only runs when the engine is running
[16:00] <jonsowman> stuff like heated seats, heated rear window etc all goes through that
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[16:01] <daveake> Oh, is that different to the normal ignition line? i.e. is it only on with engine running and not with key in ign position?
[16:01] <jonsowman> yes
[16:02] <daveake> Ah, useful
[16:02] <daveake> I have the ignition line in the boot already - that was added when I had the stereo replaced and a small subwoofer put in the boot
[16:02] <daveake> And I use that line to tell the car Pc when to start up and shutdonw
[16:03] <jonsowman> yeah that's a good idea
[16:03] <jonsowman> i've been wiring in heated electric seats into mine for the last couple of days, so i'm now far too familiar with the 406's wiring :P
[16:04] <daveake> :)
[16:04] <daveake> just in time for summer then :)
[16:04] <jonsowman> lol
[16:04] <jonsowman> quite
[16:05] <jonsowman> still got temp sensor and cruise control to do
[16:06] <daveake> You know about the trick to get the car computer (that you didn't know you had) working?
[16:06] <daveake> Or perhaps yours had it anyway
[16:06] <jonsowman> the trip computer thing with mpg and average speed etc?
[16:07] <daveake> yep
[16:07] <jonsowman> yeah i had to do the entire thing from scratch
[16:07] <daveake> !!!
[16:07] <jonsowman> on the coupe it's "turn the dial to '4' and fit the stalk with a button"
[16:07] <daveake> On mine it was a- replace the stalk with one that has the button on the end
[16:07] <daveake> and .... oh, you got it :)
[16:07] <jonsowman> hehe
[16:08] <jonsowman> i had to do all the wiring for it up to the injection ECU and vehicle speed interface
[16:08] <jonsowman> and fit the stalk
[16:08] <jonsowman> lol
[16:08] <daveake> <impressed>
[16:08] <jonsowman> http://www.406oc.co.uk/viewtopic.php?f=10&t=16864
[16:08] <jonsowman> if you feel like laughing at my pain
[16:08] <jonsowman> :D
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[16:10] <daveake> Nice job!
[16:10] <jonsowman> yeah definitely worth it
[16:10] <jonsowman> the 2.1 diesel was never fitted with them
[16:10] <jonsowman> so mine's now unique in that sense
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[16:11] Nick change: cuddykid_ -> cuddykid
[16:12] <eroomde> when doing cruise control, is it pre-existing but disabled functionality or do you have to do it all yourself?
[16:12] <eroomde> (just wondering about how much you might trust your own control system design :) )
[16:13] <daveake> "I'm sorry officer - obviously my control loop has a slight bug"
[16:13] <SpeedEvil> 'My car was infected by stuxnet'
[16:14] <number10> I set it to -32.768 mph to get round a little bugette
[16:14] <Laurenceb> jonsowman: the ublox6 i2c eeprom, does it sit on the same bus as the data interfasce?
[16:14] <daveake> lol number-10
[16:19] Action: Laurenceb has some samples from 3M
[16:19] <Laurenceb> they sent entire rolls
[16:19] <BrainDamage> trolls*
[16:19] <Laurenceb> list price of my samples is $26000
[16:20] <nick_> Rolls of what?
[16:20] <Laurenceb> maybe i should make a superpressure balloon
[16:20] <Laurenceb> pressure sensitive adhesives
[16:21] <nick_> What will you use them for?
[16:21] <r2x0t> $26000? that's some seriously expensive stuff... or really big roll
[16:26] <cuddykid> looks like twitters down
[16:26] <jonsowman> Laurenceb: i'm not sure actually
[16:26] <jonsowman> i think probably yes
[16:26] <jonsowman> eroomde: it's factory OEM kit, but not installed
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[16:27] <jonsowman> the control system is in the main car ECU which is already there
[16:27] <cuddykid> their website is always atrociously slow
[16:27] <Laurenceb> r2x0t: its about £100/meter
[16:28] <Laurenceb> im using it to assemble sensors
[16:28] <Laurenceb> but silicone trasnfer adhesive is perfect for superpressure balloons
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[16:31] Action: Laurenceb is pouring black epoxy on his pcbs
[16:31] <Laurenceb> apple style :P
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[16:43] <eroomde> i don't think they actually go as far as potting their circuits
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[18:14] <WillDuckworth> has anyone got the ublox gps going with i2c instead of serial?
[18:14] <WillDuckworth> worth doing?
[18:15] <jonsowman> use serial but with the binary protocol and polling
[18:15] <r2x0t> i2c may be interesting choice
[18:15] <jonsowman> orders of magnitude better and easier than parsing NMEA
[18:15] <number10> jonsowman: launch plans tomorrow?
[18:16] <r2x0t> because it's clocked by your CPU
[18:16] <jonsowman> number10: it's off for tomorrow i'm afraid
[18:16] <jonsowman> raining (heavily) all day in cambridge
[18:16] <number10> thought so - too windy and rain
[18:16] <jonsowman> yep :(
[18:16] <number10> best another day
[18:16] <r2x0t> would choose it instead of software serial, but if you can use hardware serial, it's easier as there is already good code for it
[18:16] <jonsowman> bit of a shame really but it's an expensive payload and launching in the rain is no fun
[18:17] <WillDuckworth> is that UBX instead of nmea?
[18:17] <nick_> What's the payload?
[18:17] <jonsowman> WillDuckworth: yep
[18:17] <WillDuckworth> ta
[18:17] <jonsowman> WillDuckworth: NB: _not_ PUBX
[18:17] <jonsowman> which is ubloxes proprietary (but still ASCII) protocol
[18:17] <jonsowman> nick_: 4 gopros
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[18:18] <number10> I must help with recovery jonsowman ;)
[18:18] <jonsowman> number10: of course, the more people we have the better
[18:18] <jonsowman> WillDuckworth: https://github.com/cuspaceflight/joey-m/blob/master/firmware/gps.c
[18:18] <jonsowman> mgiht be useful
[18:21] <WillDuckworth> cheers jonsowman
[18:21] <WillDuckworth> v helpful
[18:22] <zamabe> me
[18:23] <number10> WillDuckworth: apologies for interrupting your conversation with jonsowman `
[18:24] <jonsowman> don't worry about it :)
[18:25] <jonsowman> WillDuckworth: give me a shout if you want a hand with the UBX stuff. the datasheet makes it seem a lot more complex than it is
[18:25] <jonsowman> and you'll soon see the advantages
[18:26] <WillDuckworth> all good fun :)
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[18:47] <eroomde> eve
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[21:27] <Laurenceb_> who was giving the talk on tetroons at the last conference?
[21:27] <Laurenceb_> ive forgotten
[21:28] Action: Upu points at Dan-K2VOL I think
[21:28] <Upu> maybe not
[21:28] <Upu> afk
[21:30] <Laurenceb_> i have a load of 3M 91022 tape
[21:30] <Laurenceb_> perfect for making envelopes
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[21:32] <Laurenceb_> silicone pressure sensitive transfer adhesive, perfect for HAB
[21:33] <Laurenceb_> bond down to -70C or lower
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[21:37] <Laurenceb_> it bonds to polythene extremely well
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[21:43] Nick change: nick_ -> Guest45757
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[21:54] <SpeedEvil> neat
[21:54] <SpeedEvil> 'a load' ?
[21:58] <Laurenceb_> 12"*about 45 feet
[21:58] <SpeedEvil> ...
[21:58] <SpeedEvil> that is quite a lot :)
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[21:59] <Lunar_Lander_> hello
[21:59] <SpeedEvil> Especially as you need maybe 5mm strips
[22:01] <Laurenceb_> yeah i think they sent me an entire roll
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[22:02] <SpeedEvil> I tried that for mirror film.
[22:02] <SpeedEvil> But it's only available in 50m*1.2m rolls.
[22:02] <SpeedEvil> And they wouldn't :)
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[22:08] <Lunar_Lander_> hi daveake
[22:10] <Lunar_Lander_> how are you?
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[22:12] <Lunar_Lander_> today I started on my stripboard and got some excess connections, i.e. points where I got solder
[22:12] <Lunar_Lander_> what can I do to desolder?
[22:12] <SpeedEvil> Do you have a soldering iron with a bit with a flat on it?
[22:12] <SpeedEvil> A cone with a flat cut out of it at 30 degrees or so?
[22:13] <SpeedEvil> If so - then you can clean the iron - and then 'wick' the solder up so it blobs on the iron, then clean teh iron, then repeat
[22:15] <Lunar_Lander_> ah I got a sharp tip
[22:15] <SpeedEvil> the same technique sort-of-works, but not so well
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[22:17] <Lunar_Lander_> yea
[22:18] <Lunar_Lander_> isn't there something like having a copper band or so to wipe over the solder to be removed?
[22:19] <SpeedEvil> I just use a slightly damp cloth
[22:19] <SpeedEvil> works well
[22:19] <SpeedEvil> there is desoldering braid too
[22:21] <Lunar_Lander_> yea that I meant
[22:21] <Lunar_Lander_> OK, heat the solder to liquify and then wipe it off?
[22:21] <SpeedEvil> you can do that too
[22:22] <Lunar_Lander_> yeah I mean when the solder is solid it can't be removed
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[22:31] <Lunar_Lander_> btw
[22:31] <Lunar_Lander_> do I need to have the power rail on my stripboard also connected to Arduino's GND?
[22:31] <Lunar_Lander_> i.e. I made a power rail from the battery powered regulator
[22:32] <Lunar_Lander_> but as I know, the GPS needs a GND line to the arduino
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[22:42] <Lunar_Lander_> hi Dan-K2VOL
[22:43] <Dan-K2VOL> hey kevin
[22:44] <Lunar_Lander_> how are you?
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[22:56] <daveake> ping fsphil
[22:57] <daveake> evening LL
[22:57] <Lunar_Lander_> daveake, on my stripboard I started to make a power supply
[22:57] <daveake> Ah good
[22:57] <Lunar_Lander_> do I need to connect that GND rail to the arduino GND?
[22:57] <daveake> Any magic smoke yet?
[22:57] <daveake> YES YES YES YES
[22:57] <Lunar_Lander_> no, but I got a 3.3V rail already :P
[22:57] <daveake> All GNDs go together
[22:57] <Lunar_Lander_> thanks :)
[22:57] <Lunar_Lander_> yea
[22:58] <daveake> http://imgur.com/pClMG
[22:58] <Lunar_Lander_> and that works best via the power rail I think
[22:58] <Lunar_Lander_> cool!
[22:58] <Lunar_Lander_> then I tried to use a carpet knife to cut a track
[22:58] <Lunar_Lander_> but that did not work well, so I thought of what I could use without that special tool
[22:59] <Lunar_Lander_> screwdriver?
[23:00] <daveake> How many fingers do you have left now?
[23:00] <Lunar_Lander_> still all 10
[23:01] <fsphil> pong daveake
[23:01] <daveake> Evening :). http://imgur.com/pClMG
[23:01] <gonzo_> time for a bath then?
[23:01] <daveake> Thought as I have 2 now I should do something useful with at least one of the,
[23:01] <daveake> bath? Is it my birthday already?
[23:01] <fsphil> two? that's just showing off :p
[23:01] <daveake> lol
[23:01] <Lunar_Lander_> xD
[23:02] <daveake> I'm open to offers ... I only wanted 1
[23:02] <fsphil> that looks like it's working well -- what wizardry did you use to connect it all up?
[23:03] <Lunar_Lander_> daveake, cool!
[23:03] <Lunar_Lander_> I mean the double tool
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[23:04] <fsphil> 300 baud, that must be the pi's uart
[23:05] <daveake> You've seen through my cunning plan already
[23:05] <daveake> Yup. UART --> resistors --> NTX2
[23:06] <fsphil> I wasn't sure if it would go down as low as 300 -- not all do
[23:06] <Lunar_Lander_> xD!
[23:06] <daveake> Unless the Lassen can be turned down to 300, I'll switch to 4800, get the position, select 300, send sentence, repeat
[23:06] <daveake> Yes it does
[23:06] <daveake> 300 is listed
[23:06] <daveake> 50 isn't
[23:06] <daveake> Not that I've tried to find a workaround
[23:06] <fsphil> if we can get a gps at 300, we could skip the flight computer all together :)
[23:06] <daveake> 300 will do fine - I just want to fly it for fun
[23:06] <fsphil> yea, 300 works
[23:07] <fsphil> it's been done lots of times
[23:08] <fsphil> 1200 works too if you're feeling brave :)
[23:08] <daveake> <-- not brave
[23:08] <fsphil> me neither
[23:08] <daveake> http://imgur.com/kq5ZE
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[23:09] <daveake> Had to remove a connector on the pi to leave space for the NTX2
[23:09] <SpeedEvil> Neat
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[23:10] <SpeedEvil> Rather useless connector
[23:10] <fsphil> they're horrible connectors
[23:10] <daveake> I'm not using it and it was in the way, so it went
[23:11] <daveake> No software as such yet - just echoing a test screen in a shell script
[23:11] <SpeedEvil> They are entirely useless at the moment.
[23:11] <daveake> By default Debian runs getty on the serial port, but that's easily sorted
[23:12] <fsphil> nice job removing it
[23:12] <fsphil> the socket that is
[23:12] <daveake> Just pull off the plastic shroud, then heat each "pin" till it falls off
[23:13] <SpeedEvil> I'd just blob along one side
[23:13] <daveake> It's one piece of metal from one side to the other
[23:14] <Lunar_Lander_> daveake, but I am still thinking about how to connect to the arduino
[23:14] <Lunar_Lander_> I now soldered two male headers in for GPS TX and RX
[23:15] <Lunar_Lander_> but I thought maybe it is better to solder in cables?
[23:15] <Lunar_Lander_> what do you think
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[23:17] <daveake> This is on a piece of vero that you're connecting to an Arduino?
[23:17] <daveake> An Arduino with headers?
[23:18] <Lunar_Lander_> yeah I got an arduino pro mega 3.3V and I put headers on it so it looks like the normal mega 2560
[23:18] <fsphil> sonde's away
[23:18] <daveake> Up to you. Headers are OK though you don't want them falling off in the payload.
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[23:19] <fsphil> or breaking when landing
[23:19] <daveake> Strangely, I have to set 2 stop bits (stty 300 cstopb < /dev/ttyAMA0) to get reliable decoding, even though fldigi is set to 1 stop bit. And yes I've got the number of data bits (8) and parity (none) matching.
[23:20] <Lunar_Lander_> daveake, yeah
[23:20] <Lunar_Lander_> I got a styro box now that weighs just 50 g
[23:20] <Lunar_Lander_> I thought of placing the batteries in them and the arduino next to that
[23:20] <fsphil> the stop-bit settings in fldigi makes no difference when decoding
[23:20] <Lunar_Lander_> and then fix the board to the side of the box
[23:20] <Lunar_Lander_> so that like the GPS points up with the sarantel antenna
[23:20] <fsphil> and yea I find it unreliable with 1 stop bit
[23:21] <fsphil> I'd prefer just using the 1 stop bit, having 2 is a bit of a waste
[23:21] <daveake> Yes I know about fldigi not needing/using the setting, but I thought 1 stop bit on the pi would be OK
[23:21] <fsphil> ooh habhub says tonights sonde will land near me
[23:21] <daveake> But no, almost nothing decodes correctly
[23:21] <fsphil> it's the decoder in fldigi that can't handle the 1 stop bit
[23:21] <fsphil> at higher speeds anyway
[23:21] <daveake> fsphil Are you collecint sondes then? :p
[23:21] <fsphil> I'd like one daveake :)
[23:21] <daveake> ok
[23:22] <daveake> :)
[23:22] <Lunar_Lander_> ebay
[23:22] <Lunar_Lander_> xD
[23:22] <fsphil> I'm not going out of my way to get them, but if one lands nearby...
[23:22] <fsphil> nah I want it catch my food
[23:22] <fsphil> :)
[23:22] <fsphil> so far it's following the prediction perfectly
[23:23] <Lunar_Lander_> xD
[23:26] <daveake> I'll say one thing in favour of the pi as a tracker .... it puts out so much heat it won't get cold!
[23:26] <Lunar_Lander_> xD
[23:26] <Lunar_Lander_> i.e.
[23:27] Action: Lunar_Lander_ listens to Katy Perry - Hot and Cold
[23:27] <Lunar_Lander_> ?
[23:27] <Lunar_Lander_> XD
[23:28] <gonzo_> or kate bush - susspended in gaffa ?
[23:28] <fsphil> it gets hot?
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[23:28] <fsphil> have to admit I've not touched it
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[23:28] <Lunar_Lander_> xD
[23:29] <fsphil> I mean, we've only just met
[23:29] <daveake> The reg is quite warm
[23:29] <SpeedEvil> daveake: reportedly it works OK at 4V
[23:29] <Lunar_Lander_> fsphil, ROFL
[23:29] <Lunar_Lander_> btw regulators and temperature
[23:29] <Lunar_Lander_> I had been the stupidiest champion
[23:29] <SpeedEvil> - if you have SMPS
[23:30] <Lunar_Lander_> wanted to measure the current to the ublox
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[23:30] <Lunar_Lander_> and put the multimeter across the power rail
[23:30] <Lunar_Lander_> and got 1 A
[23:30] <Lunar_Lander_> cause I shorted the regulator of course
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[23:30] <Lunar_Lander_> which got hot
[23:30] <daveake> Oh dear
[23:30] <Lunar_Lander_> but suffered no damage apperently
[23:30] <SpeedEvil> Ssss.
[23:30] <SpeedEvil> I did that once with my mains.
[23:30] <daveake> When you said "across" ..... my jaw dropped
[23:30] <SpeedEvil> It was ... Bright.
[23:30] <daveake> Someone once asked to borrow a meter of mine
[23:30] <Lunar_Lander_> yeah like the one multimeter probe to + and the other one to -
[23:31] <SpeedEvil> The 80A fused diddn't blow, which surprised me.
[23:31] <daveake> Because it had a 10 amp range
[23:31] <SpeedEvil> Bright, and loud
[23:31] <daveake> and he wanted to test his car battery
[23:31] <Lunar_Lander_> ohh
[23:31] <gonzo_> always return the leads to the V soclets directly after taking A readings
[23:31] <fsphil> I can tell where this is going
[23:31] <Lunar_Lander_> gonzo_, well that I did
[23:31] <gonzo_> I've learnt the hard way
[23:31] <daveake> Like the undergrads wanting to measure the impedance of the mains with an AVO set to ohms
[23:31] <Lunar_Lander_> yea
[23:32] <Lunar_Lander_> meter destroyed?
[23:32] <Lunar_Lander_> battery cooked?
[23:32] <daveake> You can't destroy an AVO
[23:32] <fsphil> 12v LA batteries can source quite a bit of current
[23:32] <gonzo_> those avo's have a characteristinbg boing as the trip pops out
[23:32] <daveake> Or flies out
[23:32] <gonzo_> always got a round of aplause in the lab
[23:32] <fsphil> my PV panels can produce enough current to make a nice spark
[23:33] <daveake> :)
[23:33] <Lunar_Lander_> btw the meter I used was a Fluke digital one
[23:33] <Lunar_Lander_> I was so happy I didn't break it
[23:33] <Lunar_Lander_> cause I couldn't afford that
[23:33] <gonzo_> I use the cheepo maplins ones (cross cal against a real meter)
[23:34] <Lunar_Lander_> but then I did it the right way
[23:34] <gonzo_> that are cheap enough to throw away when the batt is flat
[23:34] <Lunar_Lander_> removed the positive lead to the GPS and used the multimeter as a bridge for that
[23:34] <Lunar_Lander_> 60 mA about
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[23:38] <daveake> Yeah I don't have any expensive meters. Several cheapish ones.
[23:45] <fsphil> not sure where mine came from, but it's quite nice
[23:45] <fsphil> it's quite warm up there tonight, only -45c
[23:49] <daveake> Lassen only goes down to 2400
[23:50] <fsphil> a bit much for 10mw
[23:50] <daveake> It's OK, I'll switch to and from
[23:51] <daveake> It'll just mean a gap between transmissions
[23:51] <daveake> It's either that or find a reliable way to get accurate timing in software for rtty
[23:53] <fsphil> I don't see how that would be possible
[23:53] <daveake> The latter? No, neither do I
[23:53] <daveake> It's not an RTOS
[23:54] <daveake> Shame neither of the UARTS support different i/p and o/p baud rates
[23:55] <fsphil> I guess you could just program it like an avr, directly without any kernel
[23:55] <daveake> Or there's the SHARP option lol
[23:56] <gonzo_> an os really seems like overkill for something as simple and critical as a flight computer
[23:56] <fsphil> do it all in mono!!1
[23:56] <daveake> It is. I just want to do it for the hell of it; it's not going to replace my usual trackers :)
[23:56] <fsphil> or better yet, flash
[23:56] <daveake> visual basic in a vm
[23:56] <fsphil> an OS does give you access to drivers
[23:57] <fsphil> lots of USB cameras
[23:57] <daveake> And webcams
[23:58] <daveake> Should the world suddenly start spinning more slowly, I'll use the extra hours to do live image downloads
[23:58] <daveake> s/do/write the code for/
[23:58] <daveake> Anyway once I've got this reading GPS and (probably) a sensor or two, I'll fly it as a spare tracker along with one my others
[23:59] <fsphil> the ssdv code is pretty solid now if you want to go down that route, although that probably wouldn't be as much fun as doing it your own way
[00:00] --- Fri Jun 22 2012