highaltitude.log.20121017

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[00:02] <hyte> hello
[00:04] <Lunar_Lander> hello
[00:06] <hyte> was about to buy a radio module and the shop said ask here first
[00:09] <hyte> do you know which one i should go for as I though either 434 mhz would be fine?
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[00:21] <hyte> was about to buy a radio module and the shop said ask here first, do you know which one i should go for as I though either 434 mhz would be fine?
[00:22] <craag> hyte: Doesn't matter really, just pick the frequency that has least interference around you.
[00:23] <hyte> cheers
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[00:27] <hyte> ordered
[00:28] <craag> :)
[00:29] <Lunar_Lander> good night!
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[00:33] <MLow> what would be some cool sensors on a payload
[00:33] <MLow> that arent too heavy on the budget
[00:34] <MLow> temps for stuff, humidity might be cool
[00:34] <MLow> pressure?
[00:38] <BrainDamage> squirrels
[00:39] <SpeedEvil> frozen chicken.
[00:39] <SpeedEvil> go for the first chicken to break the speed of sound.
[00:40] <MLow> im already putting in acc and gyro
[00:41] <MLow> maybe i could add a servo connected to a glove with a rig in it that flips off god
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[07:22] <hibby> ooooh
[07:22] <hibby> new gopro http://gopro.com/cameras/hd-hero3-black-edition
[07:22] <hibby> they've got rid of the stupid fisheye lens
[07:30] <Randomskk> oh wow
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[07:31] <Randomskk> it can do 4K?!
[07:35] <eroomde> it's not black
[07:36] <fsphil> useless then
[07:36] <Upu> waiting for the pink version
[07:36] <fsphil> 240fps though
[07:36] <fsphil> mmm
[07:37] <fsphil> it only does 4K at 12.5fps
[07:37] <fsphil> or 15fps
[07:37] <eroomde> bit od a swizz
[07:37] <eroomde> of*
[07:39] <Upu> good lord TinyGPS makes it rather easy doesn't it
[07:39] <fsphil> yep, so long as you don't look at tinygps.cpp
[07:40] <fsphil> "Optional accessories sold separately"
[07:41] <costyn> Upu: well as long as it works :(
[07:41] <fsphil> why do they even list "operating system" in specs for something that doesn't care about the OS
[07:41] <costyn> Upu: do you have a working version which works with Arduino v1?
[07:41] <costyn> (with PUBX)
[07:42] <Upu> oh no I'm using it to parse NMEA
[07:43] <costyn> ah
[07:44] <costyn> Upu: your module is working just fine, it's the tinygps library which doesn't parse the pubx sentences which is where I'm stuck at the moment :)
[07:44] <Upu> ok
[07:44] <Upu> just trying to work out how to tell TinyGPS to give me the altitude
[07:45] <Upu> ah got it
[07:50] <costyn> Upu: do you usually use the PUBX method or always just parse nmea sentences as sent by the module?
[07:50] <Upu> I use polling
[07:51] <Upu> however I'm testing an Adafruit module at the moment
[07:51] <Upu> hence using NMEA
[07:51] <costyn> I see
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[08:57] <m0psi> hi all, as far as any preference in use, is there any difference between NTX2 modules 434.075 and 434.650 MHz?
[08:57] <Upu> none really
[08:57] <Upu> 650 tends to be slightly quieter for QRM
[08:58] <m0psi> ok, thanks upu
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[09:21] <mfa298> where the QRM is can depend on location. I found on one flight .650 is the input to a local(ish) repeater.
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[09:51] <griffonbot> Received email: Ali al-Azzawi "Re: [UKHAS] Re: Launch annoucement SP9UOB-2"
[09:51] <griffonbot> Received email: Ali al-Azzawi "[UKHAS] web-based PCB builder tool"
[09:51] <griffonbot> Received email: Neil Baker "Re: [UKHAS] Remote tracking of payloads"
[10:01] <Lucasbuck> morning
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[10:02] <eroomde> morning Lucasbuck
[10:02] <fsphil> morning
[10:06] <Laurenceb> eroomde: can you help me find a force sensor/ strain guage thingy?
[10:06] <Laurenceb> im looking for something to measure +-2Kg or so
[10:06] <Laurenceb> with M3 threaded attachment points in either end
[10:06] <Laurenceb> dues such a device exist?
[10:07] <eroomde> lemme have a looksie
[10:07] <Laurenceb> some kind of mini load cell?
[10:07] <griffonbot> Received email: SP9UOB "Re: [UKHAS] Re: Launch annoucement SP9UOB-2"
[10:08] <Laurenceb> im using a honeywell sensor off electronic scales atm
[10:08] <Laurenceb> but its not very mechanically stable
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[10:14] <eroomde> Laurenceb: do you want a sort of lab quality load cell or something tiny force sensor u can embed in a product?
[10:14] <Laurenceb> lab quality
[10:15] <Laurenceb> but without any interface
[10:15] <Laurenceb> - i have that built already
[10:15] <Laurenceb> http://uk.farnell.com/tedea-huntleigh/1022m-3m-f-106/load-cell-3kg/dp/7256139
[10:15] <eroomde> http://uk.rs-online.com/web/p/load-cells/0632736/
[10:15] <Laurenceb> ^ that might be feasible
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[10:16] <Laurenceb> interesting
[10:16] <Laurenceb> similar to what i found
[10:16] <Laurenceb> ill look for something cheaper :P
[10:17] <Laurenceb> actually they are all too larger
[10:17] <Laurenceb> *too big
[10:18] <Laurenceb> i should probably just ring up some specialist suppliers
[10:19] <Laurenceb> i could glue a tekscan thin film sensor between two lumps of alu
[10:19] <Laurenceb> i wouldnt trust it to be accurate over temperature and ageing
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[10:26] <Laurenceb> http://www.meas-spec.com/product/tm_product.aspx?id=7425
[10:26] <Laurenceb> looks like what i want
[10:26] <Laurenceb> measurement specialities make some good kit - im using some of their pressure sensors
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[12:24] <Elwell> afternoon all - figured the folks here may know who to contact.... Radiometrix say their NRX1 is avail in special frequencies to order. I'd like to get some 144.800 ones for APRS i-gates. 1) anyone know min qty / price 2) if non-huge qties, anyone want to piggy-back on an order?
[12:25] <Upu> hey Elwell
[12:25] <Upu> what about the HX1 ?
[12:25] <fsphil> NRX1 is a receiver
[12:26] <Upu> oh yeah sorry
[12:26] <fsphil> this time last year, they told me: NRX1-144.800 @ £20.80 + carriage and VAT
[12:26] <Upu> if they carry it as a std frequency
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[12:26] <Upu> if not min order is 100
[12:26] <fsphil> they do
[12:27] <fsphil> I've got one at the above price
[12:27] <Upu> shame you just told me about that I ordered 10 HX1's
[12:27] <fsphil> well they're receivers only
[12:28] <fsphil> I had originally asked about them on 144.700, and they quoted silly numbers
[12:28] <fsphil> cheaper to get a baofeng :)
[12:29] <Elwell> OK - I'll also try the incantation 'you were recommended by upu' to see if the magic happens :-)
[12:29] <Upu> lol
[12:29] <Upu> don't :)
[12:30] <fsphil> hah
[12:30] <fsphil> I can't see the price changing that much since last year
[12:30] <Elwell> Upu: you got a HX1 in stock still?
[12:31] <Upu> yes lots
[12:31] <Upu> http://ava.upuaut.net/store/index.php?route=product/product&path=71_63&product_id=69
[12:31] <Upu> well 9
[12:31] <Upu> I should fix that image
[12:36] <hibby> lol
[12:36] <fsphil> close enough
[12:37] <Upu> its going to confuse someone
[12:38] <fsphil> might be worth mentioning to check local amateur radio rules
[12:38] <hibby> well, someone shouldn't be habbing.
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[12:39] <hibby> says the chap who spend an hour looking dumbly at sockets and plugs last night
[12:39] <hibby> i work in telecomms... i should know the difference between pl-259, so-259, N-male and N-female.but no.
[12:40] <Elwell> hibby: it's simple - whichever variant you need is the one that's the empty box in stores..
[12:41] <hibby> thanks, six sigma, JIT ordering and low inventory!
[12:42] <Elwell> Q - for aprs rx would I be better with nrx1 or rx1 ?
[12:42] <Darkside> er
[12:42] <Darkside> hm
[12:42] <Darkside> theres a transceiver module
[12:42] <hibby> nope, er and/or hm weren't an option
[12:43] <Darkside> not cheap though
[12:43] <Darkside> Elwell: i'd be inclined to strip down a cheap handheld
[12:43] <Darkside> perhaps a UV-3R
[12:43] Action: hibby returns to his box.
[12:43] <Elwell> Darkside: for rx only at this stage (will use the handheld if I want to tx)
[12:44] <Darkside> where is this?
[12:44] <Darkside> on the ground?
[12:44] <Elwell> yeah
[12:44] <Darkside> jeez, don't use a radionetrix module
[12:44] <Elwell> (I know, its OT)
[12:44] <Darkside> radiometrix*
[12:44] <Darkside> use something with a decent frontend
[12:44] <hibby> but where's the challenge?!
[12:44] <Darkside> like, a handheld
[12:44] <Darkside> or something else like that
[12:44] <Elwell> OK, back to fleabay :-)
[12:44] <Darkside> tbh a UV-3R is pretty cheap
[12:45] <oh7lzb> At least the cheap puxing handheld I set up for APRS has quite awful tx/rx turnaround times... takes a while to get the TX on and off
[12:45] <Darkside> like $30
[12:45] <Darkside> oh7lzb: yeah
[12:45] <oh7lzb> I wonder how the UV-3R is in that department.
[12:45] <Darkside> but for RX only it shoudl be fine
[12:45] <oh7lzb> And I would not say they have decent frontends. :)
[12:45] <Darkside> im setting up my UV-3R to be an APRS beacon in my hand
[12:45] <Darkside> haha yep
[12:45] Action: Elwell has a wouxun that he uses
[12:45] <eroomde> wouxoff
[12:45] <oh7lzb> But yeah, they are good for the money.
[12:45] <Darkside> ack, in my car*
[12:45] <hibby> eroomde: that's hilarious.
[12:45] <eroomde> i know right
[12:46] <hibby> omigod, like, totally!
[12:46] <Elwell> (made the mistake of buying a cloning cable thnking I could cut it in 2 to get 2 decent moulded plug -> bare ends.
[12:47] <Elwell> just HOW thin can the chinese make cables these days?
[12:48] <oh7lzb> It was fun to work MotoTRBO (TDMA digital on 70cm, a bit under 50% duty cycle) in Friedrichshafen in May. All of the ham HT's 5 meters around you (over there, there was always one or two) went "TSA TSA TSA TSA TSA TSA" in concert :)
[12:48] <eroomde> it's amazing isn't it
[12:48] <hibby> hahah
[12:48] <eroomde> cable and connectors are like wine
[12:48] <Elwell> '1.60 in carefour'?
[12:48] <eroomde> there are a few joyful surprises around £5 in a sea of direness
[12:49] <eroomde> but basically, you gotta be prepared to spend for when it matters
[12:49] <oh7lzb> On the other hand, the Motorola handheld was completely immune to other RF
[12:49] <Elwell> 5 quid! thats a vintage one
[12:49] <hibby> I'm just back from the Motorola factory in Berlin - the things they've got in there are spectacular.
[12:49] <Elwell> (the joys of french supermarkets)
[12:49] <eroomde> lol
[12:49] <eroomde> i have an expensive habit but i feel a happier person for indulging it
[12:49] <eroomde> rachem spec 55 wire by default
[12:50] <hibby> oh7lzb: it's more likely that the mototrbo kit had authentication built into the control channel of the tdma stream and would reject anything else.
[12:50] <eroomde> PTFE wire for low current internal wiring
[12:50] <eroomde> and amphenol GB62 connectors
[12:50] <eroomde> raychem*
[12:50] <eroomde> the double-walled stuff which shows you a different colour when you abraid through the outer layer
[12:50] Action: hibby bought $100k worth of fibre recently... I'd get the specs, but becuase it's for the arabs, I'd have to kill you after.
[12:50] <eroomde> makes spotting wiring timebombs much easierr
[12:50] <oh7lzb> hibby: That, too, but it was the same if you used it on analog. It's just much more selective than the yaesus, icoms, etc.
[12:51] <hibby> interesting. not had much experience with mototrbo - only the tetra kit, where even the simplex 'direct' comms are tdma/AMBE
[12:52] <oh7lzb> I've got two MotoTRBO handhelds, and a mobile rig in the car. Fun stuff. Proper SMS-like text messages, GPS reporting, USB on the radio.
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[12:52] <hibby> yeah. on the Dimetra Tetra system from Moto, any short messaging over 1000 characters costs somethign insane like 5000eur for a 'zone' licence
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[12:53] <oh7lzb> Plug one in the computer, it offers a standard ethernet over USB interface (no driver installation needed for Linux/Windows), the radio has a DHCP server and gives your computer an IP address. All comms happen over UDP from there on.
[12:57] <hibby> nice. the dimetra stuff it's effectively a gprs session... but that feature costs the monies!
[13:01] <Elwell> wonder what features $dayjob are getting for their install
[13:01] <oh7lzb> It's certainly not as fancy as tetra, but easier and cheaper to set up in an amateur environment.
[13:04] <hibby> oh7lzb: definately.
[13:04] <Darkside> oh man
[13:04] <Darkside> haha
[13:04] <Darkside> "If Red Bull gives you wings, then why did Felix need a parachute?"
[13:04] <fsphil> he was smart enough not to drink it
[13:04] <WillDuckworth> hey - anyone tried one of these hd cams at all? bit cheaper than a go pro:
[13:04] <WillDuckworth> http://www.ebay.co.uk/itm/NEW-SONY-HDR-AS10-HD-ACTION-CAMCORDER-FULL-HD-1080p-/330809231682?pt=UK_AudioTVElectronics_Video_Camcorders&hash=item4d05c44942
[13:05] <hibby> Elwell: probably the good ones - doubt y'all would have gone for the extra stuff like motolocator or, potentially, voice logging
[13:07] <cuddykid> hiya WillDuckworth - thanks for the tracking on Sat :)
[13:07] <cuddykid> WillDuckworth: never seen that sony one before, a lot cheaper than gopro
[13:07] <WillDuckworth> hey no prob - i managed to see it with the binos at approx 20k alt
[13:08] <cuddykid> no way! awesome!
[13:08] <WillDuckworth> yeah - similar performance to a gopro.... I tried to find it again - but it popped early if i remember correctly
[13:09] <cuddykid> yep, popped around 23km annoyingly - balloon was a pawan 1200g (grubby when I got it out of box) - they've sent another to me foc to try out again
[13:09] <WillDuckworth> jammy bugger. i've still not heard back from energizer re those batteries
[13:10] <cuddykid> hmm - that's odd, I do remember them initially taking forever to get back to me
[13:10] <hibby> WillDuckworth: similar performance to the new gopro?
[13:10] <cuddykid> what email did you try them on?
[13:10] <hibby> they've just launched a lovely new product refresh today
[13:10] <WillDuckworth> hibby - maybe not the 3
[13:10] <WillDuckworth> hopefully the v2 might get cheaper
[13:11] <cuddykid> oh, typical
[13:11] <fsphil> the new gopro is sweet
[13:11] <cuddykid> wow - looks pretty good
[13:11] <fsphil> love the high frame rate stuff
[13:12] <cuddykid> yep
[13:12] <WillDuckworth> cuddy - just info@buy.energizer.co.uk - they replied but was with 'another department'
[13:12] <hibby> I like the lack of a stupid fisheye lens.
[13:13] <cuddykid> WillDuckworth: yep, that's the one I contacted then they forwarded the email to cust services who took a while to get back
[13:14] <Laurenceb> http://images.memegenerator.net/instances/400x/9879027.jpg
[13:14] <cuddykid> 1440p - madness!
[13:15] <cuddykid> 1080 @ 60fps will be good
[13:16] <kokey> 1080 @ 60fps over rtty on 434mhz
[13:16] <hibby> 4k at 15fps, not so good.
[13:17] <cuddykid> but still - 4k, that's ridiculous :P
[13:17] <fsphil> easy kokey, although it might not be quite real-time
[13:18] <zyp> hibby, to be fair, it's the same amount of data
[13:18] <kokey> yeah most packets gets sent after landing when you plug the payload into a broadband connection
[13:18] <zyp> four times the pixels at one fourth of the framerate
[13:18] <fsphil> I wonder if you can download the video over the built-in wifi
[13:19] <fsphil> would make it tree-proof :)
[13:19] <hibby> fsphil: i'd love if you could stream over wifi, chances are slim, though
[13:19] <fsphil> it mentions a preview option
[13:19] <fsphil> over wifi
[13:19] <hibby> so I'll need to stick with foscam for "project streaming mark 2"
[13:19] <hibby> yeah, but not continuous, HD goodness.
[13:19] <fsphil> hmm... giant 2.4ghz antenna
[13:20] <hibby> buy one of those "hack wifi like a real computer hacker and be 1337" antennas
[13:20] <fsphil> I would love a gopro that just had an ethernet port
[13:20] <hibby> omigod it amplified by 9dBi! That's,like, soooo good.
[13:21] <fsphil> wonder how many pringles cans you'd need
[13:21] <hibby> pringles array!
[13:21] <hibby> did I ever share my 22dBi helical array design for 2.4g?
[13:22] <hibby> 2x2 array made from toilet pipe and mdf.
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[13:23] <fsphil> I don't believe so
[13:24] <hibby> i'll have to dig it out. Was a nice idea. never bothered my arse to acutally put it into practise because :reasons:, but, y'know.
[13:24] <hibby> things and stuff.
[13:24] Action: hibby waves hands to emphasise point.
[13:24] <fsphil> I know exactly
[13:28] <kokey> my demanding girlfriend is usually my reason
[13:28] <kokey> though I had to laugh, she came up with the idea of having a birthday list, and I agreed, it's a good idea
[13:29] <kokey> I make a long list of things and then she can pick a thing or two from that list so at least if she buys me a £100 item she knows it's at least something I want
[13:29] <kokey> somehow she forgot the details of the conversation and yesterday started ordering everything on that list
[13:30] <kokey> I can't remember how I managed to say something last night that made her realise it's not _everything_, but more like one thing
[13:30] <SamSilver> kokey: is this on the list hab vehicle http://www.gizmag.com/gibbs-quadski-soon-available/24585/?utm_source=Gizmag+Subscribers&utm_campaign=71d6884cb4-UA-2235360-4&utm_medium=email
[13:31] <kokey> well, I almost accidentally ended up with a quadcopter, microscope, kindle and microkorg, plus more stuff
[13:32] <kokey> and a girlfriend who had no cash left whatsoever until the end of the month
[13:32] <kokey> I would probably have had to buy her oyster travelcards to get to work
[13:37] <SpeedEvil> oops. :-)
[13:45] <Upu> ping Lucasbuck
[13:46] <hibby> kokey: fair traide...
[13:46] <hibby> that appears to be a new kind of trade agreement I've come up with
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[14:02] <John__> to send commands to payload, do i need a receiver in the payload
[14:03] <x-f> yes
[14:03] <zyp> how else would the payload receive the commands?
[14:06] <Laurenceb> http://www.stevebate.net/chibios-rpi/GettingStarted.html
[14:07] <eroomde> now *that* is interesting
[14:09] <John__> because i as going to use an ntx2 and radio, so does that mean i need an nrx2 plus receiver(on payload)
[14:09] <eroomde> the nrx2 is a receiver
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[14:11] <John__> i basically wanted to add the function of controlling the tilt of camera, so wanted to use a servo. So i thought it would be a small addition
[14:12] <John__> but just realised i need a receiver on the payload
[14:12] <eroomde> look at darkside's talk from the ukhas 2012 conference
[14:12] <eroomde> he demos uplinking
[14:12] <eroomde> that should help you out
[14:12] <Darkside> that system could easily be used to contro something like tilt
[14:13] <Darkside> though i'd be worried about the servos freezing up
[14:13] <Darkside> i was thinking about flying a gopro on a servo mount, so we can tilt it up when we get towards burst
[14:14] <Darkside> anyway, i'm off
[14:14] <Darkside> 0044 here
[14:15] <fsphil> nite!
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[14:26] <costyn> have accellerometers been flown on ukhas hab flights?
[14:27] <eroomde> yep
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[14:27] <costyn> anything interesting?
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[14:28] <John__> what if i have both ntx2 & nrx2 connected to one antenna and then have a radio transceiver
[14:28] <eroomde> used them for a couple of things
[14:28] <eroomde> burst detection
[14:28] <eroomde> John__: i don't think you're understanding a lot of this
[14:29] <eroomde> costyn: the more inetesting thing was for the parachute test flkight
[14:29] <eroomde> flight*
[14:29] <eroomde> using a pretty high accuracy accelerometer (+- 100G 3 axis with 5khz bandwidth) to measure the way the parachute inflated over a few 10s of ms
[14:30] <eroomde> John__: alsom question asking etiquette here suggests that you first try and provide what you think is the answer, to show that you've thought about it yourself first and also to help us see where you might be going wrong
[14:30] <eroomde> also*
[14:31] <eroomde> at the moment you're just flinging questions at the channel and it doesn't give the impression that you're putting the effort in to understand yourself. you will have difficulties pulling off a hab if this is the case
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[14:34] <fsphil> that underscores the problem
[14:34] <eroomde> brain timed out rather than irc client i suspect
[14:35] <jonsowman> lol
[14:36] <costyn> eroomde: that does sound interesting
[14:36] <eroomde> costyn: it's in our paper if u want more info
[14:37] <costyn> eroomde: sure, have a link?
[14:37] <eroomde> http://www.cusf.co.uk/CUSF_AIAA_2011.pdf
[14:37] <costyn> eroomde: I assume you cut away to get a clean deployment?
[14:37] <eroomde> yep
[14:37] <costyn> cool
[14:37] <costyn> ooh... looks like LaTeX
[14:37] <eroomde> so basially if the magnitude of the acceleration is <0.2G for about 200ms, that seemed to be a pretty good indication or burst
[14:38] <eroomde> but i make no promises as to how robuist that is
[14:38] <eroomde> it is latex
[14:38] <eroomde> what else would it be?
[14:38] <eroomde> you will never catch me using word
[14:38] <costyn> wasn't sure it it was still popular in academia :)
[14:39] <fsphil> I've started using latex for documenting the ssdv stuff
[14:39] <eroomde> back off word!
[14:39] <eroomde> http://bit.ly/RB1hYd
[14:40] <fsphil> is that mark on the right?
[14:40] <costyn> eroomde: was the high speed camera 'low cost' too?
[14:40] <costyn> ah ex-f1 I see
[14:41] <eroomde> yep
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[14:41] <eroomde> low cost in a relative sense
[14:49] <eroomde> same price as a new gopro really
[14:49] <eroomde> gopros are madly expensive when you look at it
[14:49] <Randomskk> they really are
[14:49] <Randomskk> but they're also really good
[14:50] <Randomskk> have you seen the new new gopro? (the 3)
[14:50] <eroomde> yes
[14:50] <eroomde> it is like the 2
[14:50] <eroomde> but better in a way that is not useful for the web or my tv
[14:50] <Randomskk> except it can do 4K resolution, or 240 fps at WVGA
[14:50] <Randomskk> 240fps is neat
[14:50] <eroomde> yes
[14:50] <eroomde> my tv and most sites on the web can't do those
[14:50] <eroomde> yeah granted tha's useful
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[14:51] <eroomde> will give it a whirl for slower things
[14:51] <eroomde> balloon burst actually would be a fun one
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[14:52] <costyn> 4K? that's nuts
[14:52] <eroomde> like a bay red
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[14:52] <eroomde> baby*
[14:53] <costyn> yea
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[15:01] <eroomde> arko: ping
[15:03] Action: Laurenceb is raging
[15:04] <Laurenceb> going to kill someone from saint gobain
[15:04] <eroomde> raging bull, hidden bullshit
[15:04] <Laurenceb> lol
[15:04] <Laurenceb> indeed
[15:04] <Laurenceb> they just bullshitted me massively
[15:04] <Laurenceb> then put the phone down on me
[15:05] <Laurenceb> maybe ill just report them to the FDA
[15:06] <Laurenceb> i rang up and asked some questions about if their licenses were actually valid
[15:06] <eroomde> licenses for what?
[15:06] <Laurenceb> medical cabling
[15:07] <Laurenceb> just got a query regarding some of their cabling ive got going through licensing at the moment
[15:07] <Laurenceb> looks like their sales guy bullshitted me about compliance
[15:07] <Laurenceb> and now they are just taking the piss
[15:07] <Laurenceb> funtimes
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[15:19] <SpeedEvil> https://www.youtube.com/watch?v=zd7c5tQCs1I&feature=youtube_gdata_player
[15:19] <SpeedEvil> on hard landings
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[15:20] <SpeedEvil> I suppose you have reasons to think they're invalid?
[15:20] <mromet> hello
[15:20] <SpeedEvil> hey
[15:21] <mromet> does anyone know a temp sensor best for high altitude
[15:21] <SpeedEvil> ds18b20 is common
[15:22] <mromet> ok cheers
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[15:57] <Laurenceb> http://uk.farnell.com/texas-instruments/ek-lm4f120xl/eval-stellaris-launchpad/dp/2192061?Ntt=stellaris+launchpad
[15:57] <Laurenceb> so cheap
[16:00] <hibby> it looks real good, eh?
[16:00] <Randomskk> eroomde: around?
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[16:24] <kokey> what clock speed does it run at?
[16:25] <Willdude123> Why are DVB-T dongles not very good for payload tracking?
[16:25] <Randomskk> low sensitivity
[16:25] <Randomskk> high noise
[16:25] <Randomskk> wideband agc is wiped out by nearby strong signals
[16:25] <Randomskk> other issues
[16:26] <kokey> All LM4F devices include the ARM Cortex-M4F core with the single precision floating-point capability at 80 MHz
[16:27] <Laurenceb> yep
[16:28] <Willdude123> Are there any cheap second hand radio recievers you can buy? Could I find them on Freegle/Freecycle?
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[16:49] <Willdude123> What does the 2m bit mean in here, http://www.ebay.co.uk/itm/HAM-RADIO-2MTR-70CM-HANDHELD-/200832861229?pt=UK_Mobile_Phones_Communication_Ham_Radio_Receivers_Transceivers&hash=item2ec292442d ?
[16:51] <Randomskk> 144MHz
[16:51] <Randomskk> 2m is the wavelength
[16:53] <cuddykid> Willdude123: try ebay
[16:53] <cuddykid> either FT-817 or 790
[16:54] <Willdude123> oh, it means 2.7m ?
[16:55] <cuddykid> what Randomskk said
[16:55] <LazyLeopard> Willdude123: hances are that's an FM-only radio, too.
[16:56] <LazyLeopard> Chances, even.
[16:56] <LazyLeopard> You need SSB to do any useful HAB tracking.
[16:56] <cuddykid> need something like this http://www.ebay.co.uk/itm/Ham-Amateur-Radio-Yaesu-FT817-Transceiver-/370667531229?pt=UK_Mobile_Phones_Communication_Ham_Radio_Receivers_Transceivers&hash=item564d81abdd&_uhb=1
[16:57] <Willdude123> £220 used? Is that as cheap as they go, with reasonable quality?
[16:58] <number10> or something slightly cheaper http://www.ebay.co.uk/itm/AOR-scanner-AR8000-/261113528698?pt=UK_ConsumerElectronics_SpecialistRadioEquipment_SM&hash=item3ccb94417a
[17:01] <cuddykid> Willdude123: that's v cheap for an 817
[17:01] <Willdude123> OK.
[17:02] <eroomde> Randomskk: yes now
[17:02] <eroomde> http://i.imgur.com/gbD92.jpg
[17:02] <Willdude123> How much might the auction end at?
[17:02] <Randomskk> eroomde: too late, it's fine :P
[17:02] <cuddykid> Willdude123: probably > £300
[17:02] <cuddykid> Willdude123: email the guy and see if you can close it early for cheaper
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[17:03] <Willdude123> I am just pricing the costs up.
[17:03] <cuddykid> ah ok
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[17:03] <cuddykid> I picked up my (poor condition) 817 for around £285 and that was a good buy
[17:04] <LazyLeopard> Willdude123: Well, new they're a bit under 600...
[17:04] <Willdude123> This is way more expensive than I thought it might be. Perhaps I could skip the whole radio bit and just use a cheap Android phone /GPS over GPRS tracker.
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[17:05] <cuddykid> Willdude123: it was probably the biggest hurdle for me too - took me around a year just to buy all the bits and bobs in the end due to cost
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[17:05] <BrainDamage> that won't work well
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[17:05] <BrainDamage> gsm antennas aren't pointed up the sky, it'd be a waste
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[17:06] <BrainDamage> so as you gain altitude, the signal will eventually disappear
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[17:06] <Willdude123> So? I'm not really bothered about tracking it in the sky.
[17:06] <BrainDamage> then you'll have to hope that the phone locks the gsm signal during the descent before it ends on the ground/in a ditch
[17:06] <cuddykid> tbh, you would probably be fine just getting a cheap DVB dongle provided you flew a backup SMS tracker too - others will listen into your flight and track for majority
[17:07] <BrainDamage> because chances are you won't be able to get a single signal out of it at all
[17:07] <Willdude123> I have a cheap DVB dongle, I'll see.
[17:07] <cuddykid> are there any long duration flights planned soon? They're always good fun
[17:08] <Upu> possibly this weekend
[17:08] <BrainDamage> has habamp been tested more "on the field" ?
[17:08] <cuddykid> excellent Upu :)
[17:09] <Upu> yeah I've used it a number of times BrainDamage
[17:09] <cuddykid> need to get my PCBs sorted asap
[17:09] <cuddykid> whilst you were on hols Upu I went through 2 routes then ripups, nearly there (hopefully) now
[17:09] <BrainDamage> then pair habamp to the dvb stick and you got your low cost tracking solution
[17:09] <Upu> only 2 ? :)
[17:10] <Upu> that is the idea BrainDamage
[17:10] <cuddykid> well, 2 full ones, took me ages :P
[17:10] <BrainDamage> I was talking to Willdude123
[17:10] <cuddykid> so frustrating lol
[17:10] <Upu> oh sorry :)
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[17:13] <cuddykid> Upu: Pawan are sending me another 1200g foc, will give it another shot - see if it's another poor quality one. Was a real surprise on sat when it burst so early - turned on the iPad to have a look where it was then "ahhhhhh, quick, turn around lol"
[17:14] <BrainDamage> Willdude123: http://ava.upuaut.net/store/index.php?route=product/product&path=71_63&product_id=73
[17:15] <Upu> Well see how that goes
[17:15] <SamSilver> ooh tasty
[17:17] <Willdude123> Upu , could you explain what that does?
[17:17] <Upu> sure
[17:17] <Upu> the SDR (the software defined radio's) or USB stick can be overloaded by strong local signals
[17:17] <Willdude123> Oh, does it refine the frequency to reduce noise?
[17:17] <Upu> the HABAmp filters these off and also boosts the signal coming in
[17:18] <Upu> it was designed by Darkside
[17:18] <Upu> I just make and sell them
[17:18] <Upu> http://rfhead.net/?p=484
[17:19] <Upu> right food time
[17:21] <Willdude123> What kind of battery should I power it from?
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[17:29] <craag> Willdude123: If you get it with the regulator, it'll work off anything from ~6V upto 20V.
[17:29] <craag> I run it off 12V.
[17:29] <craag> Without the regulator, it'll work on 5V only.
[17:30] <Willdude123> How much is the regulator? Is it powered from the USB?
[17:32] <craag> I believe Upu will put the regulator on the board for free if you want it.
[17:32] <Willdude123> Cool.
[17:32] <craag> You could make an adaptor to power it from USB, but it might be worth running it from a seperate PSU to reduce RF intereference from the laptop.
[17:33] <craag> or desktop..
[17:34] <craag> Ah, just noticed on the page that without the regulator, it will work from 3V to 5V supply.
[17:34] <craag> And just noticed Upu quotes 13.5V max voltage for the regulator.
[17:35] <craag> (Might explain some thermal issues I've been having with 16V input...)
[17:36] <craag> But they are awesome devices, I used one on saturday and it brought Xaben0 from being barely visible on the waterfall, to nearly 100% decodes.
[17:37] <x-f> craag, how far was it from you and what aerial you used?
[17:39] <craag> x-f: I am in Southampton, so >=100 miles. I was using a 144MHz slim-jim at roof-height and 12m of RG58.
[17:39] <craag> With an RTL-SDR.
[17:40] <x-f> sounds quite impressive for such an affordable little device
[17:43] <craag> It is! Surprised me. I haven't had much luck with it on that antenna in the past, as it's qutie good at picking up pager interference, but the HABamp completely removed that.
[17:44] <craag> I also used it as my sole receiver on the chase of CRAAG1, and it didn't let me down.
[17:47] <Willdude123> What kind of battery do people use for arduinos on HABs?
[17:49] <craag> Willdude123: Energizer Ultimate Lithiums, AA or AAA. You can either use a lot and a normal regulator, or just one or two and a 'boost' regulator to step up the voltage.
[17:50] <SpeedEvil> or just a car battery.
[17:50] <Willdude123> Would a portable USB battery work well?
[17:51] <craag> Willdude123: Depends what type of cell it contains, most don't work well below freezing temperature.
[17:51] <craag> Energizer lithiums work fine down to -40 and below.
[17:52] <Willdude123> What about 9 volts? They are supposed to work with arduino
[17:54] <x-f> Willdude123, their capacity is small - they have the volts, but don't have enough amp hours
[17:56] <craag> They'll work, but unless you use a switching regulator you'll waste about half the power just regulating it down to 5V.
[17:56] <craag> Is it a 5V or 3.3V arduino?
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[18:02] <m0psi> hi all
[18:03] <m0psi> just had our WASP kickoff meeting, and we got 26 children turn up, all excited!!!
[18:03] <m0psi> how cool is that!
[18:03] <m0psi> full of enthusiasm and excitement.
[18:05] <m0psi> The coolest part is that there were 9 girls and 16 boys. So, at least we've got over the gender prejudice
[18:09] <Upu> whats WASP ?
[18:10] <griffonbot> Received email: Postbotenamt "Re: [UKHAS] web-based PCB builder tool"
[18:15] <m0psi> WAS is Weydon Aeronautics & Space Programme. It is a HAB project for a local highschool.
[18:15] <m0psi> WAS == WASP
[18:16] <m0psi> I'm organising it for my local highschool, and trying to make sure the kids do most of the work, to get them interested in these cool things.
[18:16] <m0psi> simple mission first; take photos at 100k ft
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[18:19] <Upu> ok thats cool
[18:21] <SpeedEvil> working up to interferometric synthetic apature uv telescope, I guess
[18:22] <The-Compiler> sorry for the offtopic, anyone here has an iPhone and a minute or two of time to test some things on a website?
[18:22] <SpeedEvil> no
[18:28] <Upu> http://imgur.com/wf6vz
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[18:29] <SpeedEvil> :-)
[18:35] <fsphil> please don't teach the children to measure in feet :)
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[18:36] <BrainDamage> you should troll them instead http://imgur.com/gallery/m3zUE
[18:38] <SP9UOB> fsphil: first thing i remember form Dover : road sign - height limit in feet :-)
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[18:40] <SP9UOB> fsphil: and i said what the hell is it in meters
[18:41] <fsphil> they'll change them eventually
[18:42] <jcoxon> evening all
[18:43] <fsphil> hihi jcoxon
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[18:59] <Elwell> ping the southern hemisphere contingent -- (I know its early still) -- are they from Adelaide or elsewhere?
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[19:01] <fsphil> think it's all based in adelaide and nearby areas
[19:01] <Elwell> cool - in which case - what are the sysadmin job hunting websites :-)
[19:02] <Elwell> (will ask em 1st thing in CEST morning
[19:02] <fsphil> you'll need to wait for a local :)
[19:06] <Upu> cuddykid
[19:06] <Upu> can I clear HABE ?
[19:07] <cuddykid> Upu: yep :)
[19:07] <Upu> cheers
[19:07] <fsphil> who's up next?
[19:08] <Upu> PYSY
[19:08] <Upu> McClane
[19:09] <Upu> on Sat
[19:09] <Upu> just waiting to see if James is launching anything
[19:09] <fsphil> oh yea the HF one
[19:09] <Upu> I might make a H2 detector
[19:09] <Upu> looks quite simple
[19:10] <SP9UOB> fsphil: me at Saturday
[19:10] <Upu> oh whats your launch called SP9UOB ?
[19:10] <SP9UOB> Upu: RedBrol stratos LOL ;-) (My surname is Brol) ;-))
[19:11] <Upu> hahah
[19:11] <Upu> nice one
[19:11] <SP9UOB> upu: SP9uob-2
[19:11] <Upu> Have you done a mail to the list ?
[19:11] <SP9UOB> Upu: yes i did
[19:11] <fsphil> ah yes
[19:12] <Upu> oh yeah I'll add that shortly
[19:12] <fsphil> that's the HF one I was thinking about
[19:12] <fsphil> I shall have a listen
[19:12] <SP9UOB> fsphil: yes HF one - 28.493 MHz
[19:13] <Upu> what time are you launching ?
[19:13] <Upu> UTC
[19:13] <fsphil> 10m is either a great band, or empty
[19:13] <SP9UOB> UPU: 10:00
[19:14] <SP9UOB> fsphil: next test im planning - PSK31 at 30m (10.140 MHz)
[19:15] <SP9UOB> Balarus also will be listening: http://qrz.by/
[19:15] <SP9UOB> Belarus
[19:15] <SP9UOB> Slovakia also
[19:15] <x-f> i have informed Latvian radio amateurs too
[19:16] <SP9UOB> x-f: thanks
[19:16] <Upu> ok popped you on http://spacenear.us/tracker/
[19:17] <SP9UOB> Upu: thank You
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[19:24] <Lunar_Lander> hello
[19:25] <DrLuke> hi
[19:25] <DrLuke> jeez I'm never ever eating chili con carne again
[19:25] <DrLuke> I'm like an upside down volcano
[19:26] <jonsowman> that's disgusting and we didn't want to know
[19:27] <Lunar_Lander> ROFL
[19:34] <m0psi> SP9UOB: regarding your launch this weekend, I would like to tell some local radio people about it, so they can track your flight. But I don't have your emailwhat is your email, and they may not run the tracker version of fldigi
[19:34] <SP9UOB> m0psi: sp9uob@kalety.net
[19:34] <m0psi> ok thanks
[19:35] <jcoxon> m0psi, really encourage them to use dl-fldigi!
[19:35] <SP9UOB> m0psi: thanks
[19:35] <m0psi> for sure i will let them know about it
[19:35] <m0psi> for me (on my mac) it crashes after 4-5min
[19:35] <jcoxon> m0psi, we need to track that down
[19:35] <m0psi> so, i'm concerned about that when i get to launch our balloon
[19:36] <SP9UOB> also some HAMS from US will listen
[19:36] <m0psi> jcoxon; happy to provide log data. let me know how to do that
[19:36] <jcoxon> when it crashes you should be able to get the 'report'
[19:36] <jcoxon> when it asks you if you want to relaunch
[19:36] <m0psi> ok, i can do that for sure
[19:37] <m0psi> who shall i send that to?
[19:37] <jcoxon> me
[19:37] <m0psi> ok, will do that now
[19:39] <Lunar_Lander> hi jcoxon
[19:39] <jcoxon> hello Lunar_Lander
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[19:41] <m0psi> jcoxon, what is your email address?
[19:42] <jcoxon> jacoxon at gmail
[19:42] <m0psi> jcoxon, found it
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[19:47] <m0psi> jcoxon, the log i sent you just now was running the app with no input. all i did was start the app, and left it running, with no clicks or nuffing
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[19:49] <jcoxon> m0psi, hmmmm
[19:49] <jcoxon> let me investigate
[19:49] <m0psi> ta
[19:50] <m0psi> i noticed the computer fan running faster during the time it was running
[19:50] <BCVisin> hey guys! I got the high altitude bug recently and I want to go out into the Mojave desert and send up a gopro with a SPOT tracker
[19:50] <m0psi> like it was not cleaning up processes, maybe
[19:51] <BCVisin> I go dirt bike riding out there all the time, and I am thinking me and a few friends can go out there and launch the balloon and then ride/drive and track it
[19:52] <BCVisin> I am also a computer programmer as my day job and I was thinking about getting the Arduino board and some sensors/gps receiver
[19:53] <BCVisin> hooking it all up and seeing what it does
[19:53] <BCVisin> Anyone have any experience with the Arduino boards at high altitudes?
[19:54] <Upu> they work
[19:55] <Upu> just make sure its all tied together well
[19:55] <Upu> you might want to consider a radio tracker too
[19:56] <Upu> don't put the GoPro in its case and don't use the antimist strips either
[19:59] <BCVisin> Why don't put the gopro in the case? Pressure?
[19:59] <x-f> jcoxon, if you need another crash report on a mac, i can send you mine - it also crashed after a few minutes of doing nothing
[20:00] <MLow> anyone in here from the states
[20:01] <BCVisin> How does all the equipment handle the temperatures? I need to insulate it and keep it warm, right? I have seen people using hand warmers. Do I need to insulate and keep the gopro warm?
[20:01] <Upu> you don't need them
[20:01] <MLow> no warmers needed
[20:01] <Upu> just use an insulated box
[20:01] <MLow> im wanting to find out helium costs in the US right now
[20:01] <Lunar_Lander> hello Upu, everything good?
[20:01] <MLow> curious if anyone has done a US launch recently
[20:02] <Upu> mostly yes
[20:02] <Lunar_Lander> that's good to hear
[20:04] <jcoxon> x-f, yes please
[20:05] <fsphil> if you have the gopro in the case, the moisture can condense on the lens cover and freeze BCVisin
[20:05] <fsphil> moisture in the air*
[20:05] <MLow> i have some compiles of my tracking application for aprs if anyone can please test it for me
[20:07] <m0psi> sp9uob, just seen your reply on the group :-)
[20:08] <cuddykid> ah yes - fldigi did keep crashing on my mba too
[20:08] <cuddykid> 10.8.1
[20:08] <cuddykid> *10.8.2
[20:08] <BCVisin> fsphil: so the gopro will be fine with the temps? Or should I make sure to insulate it as well, and just leave the lens exposed?
[20:09] <cuddykid> BCVisin: go pro will be fine
[20:09] <BCVisin> ok, cool
[20:09] <cuddykid> don't even need to insulate it well - it would be fine completely uninsulated
[20:09] <MLow> it will be exposed to -40f for like 20 minutes or so
[20:10] <MLow> the more harsh conditions are probably all the lack of air and changing pressure
[20:10] <BCVisin> so I got my HAM license a long time ago, what would I use for radio tracking? I was planning on relying on the SPOT. I have a few handhelds and a mobile base in my truck.
[20:11] <MLow> BCVisin: aprs?
[20:11] <fsphil> yea it generates enough heat to keep itself going
[20:11] <MLow> BCVisin: if you are in the states there are tons of balloons that prove aprs works well for tracking alone
[20:11] <fsphil> yea aprs is very popular over there
[20:12] <MLow> the trackuino is under 100 to make
[20:12] <BCVisin> right, I was meaning more about what small radio module to use
[20:12] <MLow> HX1
[20:12] <Lunar_Lander> BCVisin, welcome aboard
[20:12] <Lunar_Lander> :)
[20:12] <BCVisin> thanks Lunar!
[20:12] <MLow> and trust me, its a bitch to get working right from the US supplier lemosint
[20:12] <BCVisin> :)
[20:12] <fsphil> you ever get that sorted MLow?
[20:12] <MLow> they ship the narrow one, which you need to 'fix' a little
[20:13] <MLow> as for gps what are you looking at?
[20:13] <MLow> i bought one pre-flashed with high altitude firmware
[20:14] <MLow> fsphil: thanks for remembering me :D, yes i did
[20:14] <MLow> it works awesomely, im making the antenna for the payload now
[20:14] <MLow> RG58 connected to a ground plane antenna
[20:14] <fsphil> sweet. yes I remember it well
[20:15] <MLow> the software was all lost with a hard drive failure :(
[20:15] <MLow> so I rewrote it almost all, starting with a git pull of the latest trackuino software, and mixing in my sensors and modifications
[20:15] <MLow> my gps and sensors are different
[20:15] <BCVisin> GPS I was looking at the Garmin GPS 18 LVC
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[20:16] <MLow> BCVisin: if you can get one of those for on the cheap it may be worth the slower refresh rate
[20:16] <MLow> what is that things refresh rate like 2hz?
[20:16] <MLow> i mean 2 seconds*
[20:16] <BCVisin> I am green to all this. I have a few handheld garmin's like the 60CSX, but I don't that's probably too much weight, and they may not work at high altitudes
[20:17] <MLow> the 18 does
[20:17] <BCVisin> * mean I do think it's probably too much weight
[20:17] <SP9UOB> MLow: Real tough guys do not use RAID ;-)
[20:17] <MLow> SP9UOB: i use dropbox now lol
[20:17] <MLow> raid is hard to setup right in a laptop
[20:18] <SP9UOB> MLow: right
[20:18] <fsphil> github is my backup atm
[20:18] <SP9UOB> MLow: 2hz is 0.5 second
[20:19] <MLow> SP9UOB: exactly
[20:19] <SP9UOB> MLow: nod need it for HAB tracking
[20:19] <MLow> i was thinking of my gps being 1hz and spit out 2
[20:19] <fsphil> brb, trifle :)
[20:20] <SP9UOB> ok, good night all
[20:20] <MLow> night SP9UOB
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[20:20] <MLow> BCVisin: personally I would prefer a solid gps and I just have never used the garmin 18
[20:21] <BCVisin> solid as in self contained...like an eTrex?
[20:22] <MLow> no
[20:22] <MLow> like a gps unit module
[20:22] <MLow> not a repurposed civilian device
[20:23] <BCVisin> recommendations?
[20:24] <MLow> depends on your budget
[20:24] <MLow> if you already have the gps and your on a tight budget then go for it
[20:24] <MLow> your first launch might just end up lost anyways
[20:25] <BCVisin> no, I don't have anything yet except the SPOT tracker and a gopro
[20:25] <MLow> spot has proven to work when other things fail so thats good
[20:25] <BCVisin> I am not on an extremely tight budget, but I don't want this to be a crazy expensive project
[20:26] <BCVisin> I was thinking in the 100-300 range...preferably closer to the 100
[20:26] <MLow> 38 buys a gps flashed with high altitude firmware
[20:28] <BCVisin> where from?
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[20:33] <Lunar_Lander> and who is 38?
[20:35] <BCVisin> I think he meant $38
[20:35] <MLow> https://www.argentdata.com/catalog/product_info.php?products_id=144
[20:35] <MLow> 20grams
[20:36] <MLow> hehe, talk about light
[20:36] <MLow> it gets an accurate lock in my house after a minute or so
[20:37] <jcoxon> 20g!
[20:37] <jcoxon> thats loads
[20:38] <BCVisin> ok, but you would recommend using Arduino as the computer?
[20:38] <jcoxon> http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=52
[20:38] <jcoxon> 1.5g
[20:39] <Lunar_Lander> BCVisin, arduino is awesome
[20:39] <Lunar_Lander> !
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[20:39] <MLow> chip ant. vs patch ant.
[20:40] <jcoxon> the ublox6 chipset makes up for that
[20:41] <MLow> i dunno
[20:41] <MLow> but hey whatever floats your boat
[20:41] <jcoxon> okay http://ava.upuaut.net/store/index.php?route=product/product&path=59_60&product_id=51
[20:42] <MLow> is that 5v ttl?
[20:42] <jcoxon> nah 3.3v
[20:42] <MLow> eh
[20:42] <MLow> i do all my stuff at 5v
[20:43] <MLow> need a logic chip to add on
[20:43] <jcoxon> :-) 5v
[20:43] <jonsowman> MLow: the interface to the gps should be easy
[20:44] <jonsowman> 3V3 high from the GPS should be above V_IH for the micro
[20:44] <jonsowman> if you need to talk to the GPS from the micro then use a potential divider
[20:44] <MLow> not really interested in it though
[20:44] <MLow> i got a 5v gps
[20:44] <jonsowman> fair enough, what is it?
[20:45] <MLow> a prolific module with patch antenna
[20:45] <jonsowman> as long as it works at altitude
[20:45] <jonsowman> fair enough
[20:45] <MLow> flashed with high altitude firmware
[20:45] <jonsowman> cool
[20:45] <MLow> basically flashed to use | instead of &
[20:45] <jonsowman> other way round surely?
[20:46] <MLow> if(altitude < X | velocity < X)
[20:47] <jonsowman> oh you're talking about when it _does_ work
[20:47] <MLow> yes
[20:47] <jonsowman> also technically ||
[20:47] <MLow> depends on language *cough*
[20:47] <jonsowman> lol
[20:47] <MLow> its probably C i dunno
[20:47] <MLow> so ya
[20:47] <MLow> whateva
[20:47] <jonsowman> cool
[20:47] <MLow> i do what i want
[20:47] <jonsowman> sounds like you're set
[20:48] <MLow> i hoping eh
[20:48] <MLow> just trying to nail down the costs of helium
[20:48] <MLow> seems theres i a peak in the US
[20:48] <MLow> deciding if I want a 800g or 1000g
[20:48] <MLow> shooting for 1kb payload
[20:49] <jonsowman> 800g will be fine
[20:50] <MLow> yeah i dont want to break any records any time soon
[20:50] <jonsowman> http://cusf.co.uk/calc
[20:50] <MLow> scientific sales has a 800g for $69
[20:50] <jonsowman> shameless advertising
[20:50] <MLow> i have that bookmarked
[20:50] <MLow> :)
[20:50] <MLow> http://www.scientificsales.com/ProductDetails.asp?ProductCode=8242&CartID=1
[20:51] <jonsowman> not too bad
[20:52] <MLow> Burst Altitude:25892m
[20:52] <MLow> from that calc
[20:52] <MLow> 5m/s ascend
[20:52] <jonsowman> you could go for a slightly slower ascent
[20:52] <jonsowman> 4m/s maybe?
[20:52] <MLow> only adds 1km
[20:52] <MLow> but adds 30 mins to ascend
[20:53] <jonsowman> tradeoffs
[20:53] <jonsowman> it makes it a bit easiet to fill
[20:53] <MLow> diminished returns seems to be around 5m/s
[20:53] <jonsowman> *easier
[20:53] <jonsowman> due to lower neck lift
[20:53] <MLow> right
[20:53] <MLow> less helium....*cough*
[20:54] <jonsowman> that too
[20:54] <MLow> more drift :(
[20:54] <jonsowman> yes, indeed
[20:54] <MLow> texas is surprisingly woody
[20:54] <MLow> further downwind
[20:54] <fsphil> that is a surprise
[20:54] <MLow> moreso
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[20:56] <MLow> wed have harder time locating if in a pine
[20:56] <fsphil> trees can actually make it easier to locate, by keeping the antenna up high
[20:56] <fsphil> the trick is getting it out of the tree
[20:57] <MLow> lol
[20:57] <MLow> yes. indeed.
[20:57] <MLow> is there any reason
[20:58] <MLow> when i put a target ascent it doesnt use it
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[21:01] <MLow> i think i want to do a 1/8th wave ground plane
[21:01] <MLow> anyone try that?
[21:03] <MLow> eh worth a shot, ill use SWR meter and see how it transmits with range tests on the ground
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[21:18] <fsphil> yea ground testing is always worth it
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[21:20] <MLow> cant find any good copper wire in my boxes
[21:20] <MLow> all too thin
[21:20] <MLow> off to the STORE
[21:26] <Lucasbuck> evening
[21:26] <Lucasbuck> speaking of copper wire, any good references to radio construction for payloads?
[21:27] <Lucasbuck> for a radio newbie
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[21:50] <MLow> WOO JUST GOT MY HAKKO FX888
[21:50] <MLow> sorry for the caps
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[21:50] <Lunar_Lander> xD is that a receiver?
[21:51] <MLow> temperature controlled soldering station
[21:51] <Lunar_Lander> cool
[21:51] <MLow> it just heated to 350c in like 60 seconds out the box
[21:52] <SpeedEvil> has
[21:52] <SpeedEvil> hawt
[21:54] <MLow> about 660f
[21:54] <MLow> 70w iron heats fast
[21:55] <MLow> i sent my better half to pick up some supplies
[21:55] <MLow> she wanted fast food i gave her a list
[21:57] <Lunar_Lander> yes
[21:57] <Lunar_Lander> so you can try the iron?
[21:59] <MLow> yes :)
[21:59] <MLow> solding wires together atm
[21:59] <MLow> imma make a stick figure man
[21:59] <MLow> :B
[22:00] <Lunar_Lander> XD!
[22:01] Action: SpeedEvil wants a welder.
[22:01] <SpeedEvil> a nice tig one would be nice.
[22:01] <fsphil> I tried welding once, kept getting the thing stuck
[22:01] <SpeedEvil> yeah.
[22:02] <SpeedEvil> tig somewhat avoids that issue
[22:02] <MLow> never tried
[22:02] <MLow> looks neat
[22:03] <Lunar_Lander> electric welding or acetylene?
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[22:05] <fsphil> [ot] anyone with a nexus 7 recommend a case?
[22:06] <SpeedEvil> https://www.youtube.com/watch?v=SrDoqKaAf18&feature=youtube_gdata_player
[22:06] <SpeedEvil> awesome vids, including decent shots of the arc
[22:06] <SpeedEvil> I need a case for mine.
[22:06] <SpeedEvil> but I want something slim. :-\
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[22:07] <fsphil> he's a good ventriloquist
[22:07] <SpeedEvil> I really want a plastic shell 1.5mm or so thick that conforms to the back perfectly, and has at least some porttion transparent
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[22:08] <SpeedEvil> so you pull it off the back, and fit it to the front, and it completely protects the screen
[22:08] <SpeedEvil> but adds minimal volume
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[22:11] <fsphil> plasma cutter is neat
[22:14] <MLow> going to put a buzzer on my box
[22:14] <MLow> 108db, 9v
[22:16] <Lunar_Lander> cool
[22:17] <Lunar_Lander> symphony of science has a balloon launch in the latest song
[22:17] <Lunar_Lander> http://symphonyofscience.com/
[22:17] <Lunar_Lander> at about 2:10
[22:17] <Lunar_Lander> :)
[22:21] <MLow> she brought a 120db one, holy moly
[22:21] <MLow> its louder than a car alarm
[22:23] <Lunar_Lander> XD
[22:24] <MLow> this thing hurts
[22:24] <MLow> and i listened to a lot of live music growing up
[22:25] <Lunar_Lander> yeah
[22:25] <Lunar_Lander> like standing in front of the speakers at a festival?
[22:25] <Lunar_Lander> or so
[22:25] <MLow> indeed
[22:25] <MLow> or just lots of leaning against the woofer in a club
[22:25] <Lunar_Lander> yeah
[22:26] <Lunar_Lander> IIRC a friend told me of a rock festival on which the band recommended the people in the front to wear ear protection xD
[22:26] <MLow> i walked into a woofer once
[22:26] <Lunar_Lander> oh
[22:26] <MLow> i mean like, it had a door on the side of the box and i thought it was a bathroom
[22:26] <MLow> i was like wtf this is the worst shitter ever
[22:26] <Lunar_Lander> XD
[22:27] <Lunar_Lander> ROFL
[22:27] <Lunar_Lander> how much voltage is on these things btw?
[22:27] <MLow> it says 6-16
[22:27] <Lunar_Lander> ah
[22:27] <MLow> i put a 9v on it to test and nearly pooped
[22:27] <Lunar_Lander> talking about speakers, it reminds me of this: https://www.youtube.com/watch?v=eA1jSlx9c30
[22:27] <Lunar_Lander> oh
[22:28] <Lunar_Lander> yeah I mean if there was a shock risk when you opened up that festival speaker
[22:29] <MLow> no clue i was piss drunk
[22:29] <Lunar_Lander> ah
[22:29] <Lunar_Lander> XD I wonder how the non-newtonian fluid thing would look like with one of those big speakers
[22:30] <MLow> that one movie comes to mind
[22:30] <MLow> with the big green goo
[22:30] <MLow> that walks around
[22:30] <Lunar_Lander> xD
[22:30] <fsphil> Titanic?
[22:31] <MLow> have you watched that movie?
[22:32] <fsphil> sadly yes. I don't think it was as interesting as I remember it though
[22:32] <Lunar_Lander> isn't it with Robin Williams or so?
[22:32] <MLow> Lunar_Lander: yeah
[22:32] <fsphil> oh that one
[22:33] <fsphil> flubber
[22:33] <Lunar_Lander> XD
[22:33] <MLow> yeahhhh
[22:33] <MLow> oh good lord that was a horrible movie
[22:33] <fsphil> not seen that one
[22:33] <fsphil> ah, good then
[22:33] <Lunar_Lander> that movie in which he is a robot is cool
[22:33] <MLow> but yea, giant woofer plus green cornstarch = flubber
[22:34] <Lunar_Lander> and where he like makes artificial kidneys and stuff and turns human and lives 200 years
[22:34] <fsphil> bicentennial man
[22:34] <fsphil> yes I liked that
[22:34] <Lunar_Lander> yea
[22:38] <Lunar_Lander> and what do you think of the Symphony of Science?
[22:38] <fsphil> dunno it
[22:39] <Lunar_Lander> http://symphonyofscience.com/
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[00:00] --- Thu Oct 18 2012