highaltitude.log.20111217

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[00:16] <jcoxon> ping Zuph
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[08:55] <jcoxon> morning
[08:56] <SpeedEvil> Indeed.
[09:16] <nosebleedKT> hi
[09:16] <nosebleedKT> jcoxon remember a thing about chdk ?
[09:16] <nosebleedKT> did you need to use set_aflock(1) ?
[09:20] <jcoxon> nosebleedKT, its been many years since i've used it - sorry
[09:21] <nosebleedKT> haha, ok :)
[09:21] <nosebleedKT> beteran jcoxon :P
[09:22] <fsphil> mornings
[09:22] <jcoxon> hey fsphil
[09:25] <fsphil> how's things over yonder jcoxon?
[09:28] <nosebleedKT> fsphil do u use set_aflock(1) ?
[09:28] <jcoxon> fsphil, good thanks, pleased with my pico payload lasting for 14hrs
[09:28] <jcoxon> sad that i had to upgrade to 2AAAs though
[09:28] <SpeedEvil> Considered exotics?
[09:29] <SpeedEvil> Li-primaries?
[09:29] <SpeedEvil> not 1.5
[09:29] <jcoxon> energizer lithiums with setup
[09:29] <jcoxon> stepup*
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[09:32] <SpeedEvil> http://www.saftbatteries.com/Produit_LS_cell_range_303_6/Language/en-US/Default.aspx say
[09:32] <SpeedEvil> Teh 1/2 AA
[09:33] <SpeedEvil> Double the energy of a AAA lithium, barely heavier
[09:33] <Darkside> check the continuous current rating
[09:33] <SpeedEvil> Oh - I forgot that sucked
[09:34] <Darkside> this is the problem with the saft batteries
[09:34] <Darkside> they are really designed for backup battery systems
[09:34] <fsphil> lol. upgrade
[09:34] <fsphil> nosebleedKT, nope - I keep my chdk scripts very simple
[09:34] <nosebleedKT> kk
[09:34] <Darkside> jcoxon: using the 1402 yet?
[09:34] <nosebleedKT> Darkside and you?
[09:34] <Darkside> and me?
[09:34] <nosebleedKT> did u ever use set
[09:35] <nosebleedKT> set_aflock(1)
[09:35] <Darkside> i havent done CHDK stuff
[09:35] <Darkside> we fly go-pros remember
[09:35] <fsphil> my poor gopro has yet to see any altitude
[09:35] <nosebleedKT> ooo
[09:35] <nosebleedKT> too xpensive for GR
[09:35] <nosebleedKT> :P
[09:36] <fsphil> to expensive for NI unless the prediction has no winds at all ;)
[09:36] <fsphil> +o
[09:36] <nosebleedKT> NI?
[09:36] <fsphil> northern ireland
[09:36] <nosebleedKT> lol
[09:37] <fsphil> it's just sooo tiny
[09:37] <nosebleedKT> thats a picture i just took from my new canon 490 from my balcony.
[09:37] <nosebleedKT> http://a4.sphotos.ak.fbcdn.net/hphotos-ak-ash4/390682_2369202594301_1377549819_2087018_2029155035_n.jpg
[09:37] <jcoxon> Darkside, i haven't
[09:37] <nosebleedKT> this is what i will fly
[09:37] <jcoxon> would need to source some
[09:37] <fsphil> nice nosebleedKT
[09:38] <nosebleedKT> I know im a good photographer
[09:38] <nosebleedKT> :P
[09:39] <fsphil> same sort of weather as here
[09:39] <nosebleedKT> yay!
[09:39] <fsphil> just probably warmer lol
[09:39] <Darkside> jcoxon: the 1402 should supply enough current for the ublox
[09:39] <nosebleedKT> no more zombieland
[09:39] <Darkside> theres also the TPS61000 chips or whatever they are
[09:39] <fsphil> we only get a few hours of daylight this time of year nosebleedKT
[09:39] <nosebleedKT> omg...
[09:39] <Darkside> http://www.sparkfun.com/products/10255
[09:40] <Darkside> jcoxon: ^
[09:40] <Darkside> thats the board we use on our aprs payload
[09:40] <Darkside> to run it off 2xAAs
[09:40] <jcoxon> Darkside, oh cool
[09:41] <Darkside> we're workin on a dual-rail PSU board
[09:41] <Darkside> which will have one of those for 5V and a separarte 3.3v supply
[09:41] <nosebleedKT> fsphil: the good thing about this balcony is that the wind comes straight from those mountains on the background. That air is so fresh.
[09:41] <fsphil> aaah
[09:42] <jcoxon> Darkside, i'll try that
[09:42] <Darkside> jcoxon: with that board you need to change the resistors to change the UVLO voltage
[09:42] <Darkside> 2.6v is too high
[09:42] <fsphil> Darkside, what's weird about that board is the 3.3V @ 200mA bit. it can provide less current at 3.3v than 5v
[09:43] <Darkside> something to do with how the switchmode supply works i guess
[09:43] <fsphil> yea
[09:44] <fsphil> ooh, sunrise/set calculator says the day here is about 7h 15m at the moment
[09:44] <jcoxon> Darkside, ooo found a guide to do that
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[10:00] <jcoxon> morning RocketBoy
[10:01] <RocketBoy> hey jcoxon - I just woke up - mmm good sleep
[10:02] <jcoxon> hehe
[10:03] <RocketBoy> Some balloon orders to post off today - where is the WillDuckworth - he isn't respondig to emails
[10:05] <RocketBoy> yeah that didn't work for me either
[10:05] <jcoxon> strange
[10:05] <RocketBoy> tiss
[10:05] <RocketBoy> name length?
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[10:06] <fsphil> Dec 15 17:16:24 * WillDuckworth has quit (Quit: Page closed)
[10:06] <fsphil> I'll stand in for the bot ;)
[10:06] <jcoxon> good good
[10:06] <RocketBoy> !thas a good memory fsphil
[10:07] <fsphil> lol
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[10:23] <DanielRichman> RocketBoy: yo
[10:23] <RocketBoy> Sorry DanielRichman - i was just trying your name in !seen - because its nice and long
[10:24] <DanielRichman> ah, no problem ;-)
[10:24] <RocketBoy> and it haddent worked for WillDuckworth
[10:24] Nick change: DanielRichman -> Daniel_Richman
[10:24] Nick change: Daniel_Richman -> DanielRichman
[10:25] <DanielRichman> ^^
[10:25] <RocketBoy> hum
[10:26] <DanielRichman> #bs(nicksize) is the maximum nickname length (9 on Undernet)
[10:26] <DanielRichman> set bs(nicksize) 9
[10:26] <DanielRichman> in bseen1.4.2.tcl
[10:34] <DanielRichman> so maximum nick length on freenode is 16. Shall I change that config for zeusbot?
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[10:40] Nick change: DanielRichman -> Daniel_Richman
[10:40] <Daniel_Richman> win.
[10:40] Nick change: Daniel_Richman -> DanielRichman
[10:41] <DanielRichman> great success
[10:41] <DanielRichman> RocketBoy: ^^
[10:41] <RocketBoy> still confused bcause WillDuckworth is shorter
[10:41] <RocketBoy> ah
[10:41] <DanielRichman> len("WillDuckworth") > 9
[10:42] <RocketBoy> oh yes
[10:43] <RocketBoy> so yes we need 16
[10:52] <RocketBoy> DanielRichman: thanks for investigating that
[10:53] <RocketBoy> I still need that WillDuckworth though
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[11:02] <RocketBoy> afk
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[12:00] <fsphil> http://www.southgatearc.org/news/december2011/southampton_university_hab.htm
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[12:11] <fsphil> snow! ... ish
[12:12] <NigelMoby> snow, where?
[12:13] <fsphil> here
[12:13] <fsphil> sorta
[12:13] <fsphil> it's raining, but every so often its snow
[12:14] <joph> <<< also snow
[12:14] <joph> hope i can receive the signal from this balloon with my brand new funcube dongle
[12:14] <fsphil> oooh good luck
[12:15] <fsphil> I tracked mine after launch with the funcube dongle, worked well
[12:15] <fsphil> although our launch site has no strong signals nearby
[12:15] <NigelMoby> send me some snow dude.
[12:15] <fsphil> it's rain again :(
[12:16] <NigelMoby> Meh :(
[12:17] <joph> first i have to build a directional antenna and a xy control via stepper
[12:17] <fsphil> oooh you should document that as you do it joph
[12:17] <fsphil> more than a few people here would be interested
[12:18] <joph> yeah
[12:18] <joph> the antenna will be one which is already calculated by someone other, i have no experience with HF, but thats no problem, there're a lot oft 70cm diy manuals
[12:19] <fsphil> I'm using two diamond yagis
[12:19] <fsphil> not sure I could ever build one
[12:19] <Darkside> ahh they're not hard to build
[12:19] <Darkside> i'm putting up some phased yagis when i'm up in whyalla, so my dad can track our balloons better
[12:19] <joph> hehe
[12:19] <Darkside> he's been a great RX station for our last launches
[12:19] <Darkside> then again his current beams are on a 30 ft tower
[12:20] <joph> nice
[12:20] <fsphil> yea height is the key
[12:20] <Darkside> dual beams, 18 elements each
[12:20] <Darkside> but they are tuned too high
[12:21] <Darkside> so i'm replacing them with some better beams tuned for 434MHz
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[12:26] <joph> i'll place my antenna in the garret
[12:26] <joph> maybe in the future direct on the roof
[12:26] <NigelMoby> if my cat don't shut up ill be placing mine firmly up his ass!
[12:28] <Randomskk> I don't think that will make the cat quieter exactly
[12:29] <NigelMoby> lol , hey Randomskk
[12:30] <Randomskk> hiya :P
[12:30] <Randomskk> how's it going?
[12:31] <NigelMoby> all good dude, and u?
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[12:32] <Randomskk> ntb, weekend at last :D
[12:32] <NigelMoby> Yush, and almost Xmas !!
[12:32] <Randomskk> :D
[12:33] <NigelMoby> have the unis finished yet ?
[12:37] <Randomskk> I went home two weeks ago
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[12:37] <Randomskk> then started work >_>
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[12:37] <Randomskk> so I haven't actually had any holiday yet, but yes
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[12:49] <NigelMoby> Ohh, nice n busy then.
[12:57] <Randomskk> hah, for sure
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[14:03] <SpeedEvil> Interesting - http://pubs.acs.org/doi/abs/10.1021/nl2023433
[14:03] <NickB1> anyone that can help me with a question about the ntx2?
[14:03] Action: SpeedEvil finds paywalls annoying.
[14:03] <SpeedEvil> Shoot.
[14:03] <NickB1> I'm drawing a shield for the arduino mega which contains the ntx2
[14:03] <NickB1> its a 2 layer board
[14:04] <NickB1> the bottom layer is the groundplane
[14:04] <NickB1> does the RFGND need to be tied to this plane ?
[14:05] <NickB1> now it hes a seperate small plane to the SMA connector
[14:05] <NickB1> *has
[14:07] <SpeedEvil> Sorry - unsure.
[14:07] <SpeedEvil> I've never actually used one.
[14:07] <SpeedEvil> Just heard random stuff from snippets.
[14:07] <SpeedEvil> Maybe later on people will wake up.
[14:08] <NickB1> ok thanks anyway
[14:08] <NickB1> i found the design for the micronut
[14:08] <NickB1> there it is all tied together
[14:08] <NickB1> going to go with that apprauch i think
[14:19] <SpeedEvil> :)
[14:22] <Darkside> eh?
[14:22] <Darkside> micronut designs arent open
[14:22] <Darkside> mininut are
[14:26] <Zuph> Darkside: Just the guy I wanted to talk to!
[14:26] <jcoxon_> oh hey Zuph
[14:26] <Zuph> hey jcoxon_, sorry for ignoring you last night
[14:26] <NickB1> yes i mean mininut :D
[14:27] <NickB1> also designing in altium
[14:27] <Darkside> heh
[14:27] <Darkside> yes, i did those designs
[14:27] <Darkside> yay altium
[14:29] <NickB1> yeah i figured it was you :)
[14:29] <NickB1> great design you made
[14:29] <Darkside> mininut isnt that good
[14:29] <Darkside> micronut is way better
[14:30] <Darkside> does lack certain features however, like the microSD and the pressure sensor
[14:30] <NickB1> is the RF side better or ?
[14:30] <Darkside> rf side hasnt changed
[14:30] <Darkside> its still the NTX2 form factor modules
[14:30] <Darkside> but the micronut has an onboard GPS
[14:31] <Darkside> http://rfhead.net/wp-content/uploads/2011/09/MicroAPRS.jpg
[14:31] <Darkside> thats the micronut board
[14:31] <NickB1> oh ok didnt look at the gps side :)
[14:31] <NickB1> yeah I saw it on hackaday a while back
[14:32] <Darkside> oh with the music thing?
[14:32] <NickB1> yes :)
[14:32] <Darkside> heh
[14:32] <Darkside> that was a haaaack
[14:32] <Darkside> but anyway, micronut works nicely
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[14:33] <Darkside> next version will put the microSD card socket back in again
[14:33] <Darkside> and probably have the pads there for the presure sensor
[14:33] <NickB1> yes it looks like you have a little room left
[14:34] <Darkside> not on the micronut board
[14:34] <Darkside> i guess i do have some space on the other side
[14:34] <Darkside> but i wanted to keep everything away from the radio module
[14:35] <NickB1> yeah thats a good idea
[14:35] <NickB1> did you do a calculation for the trace impedance to the antenna
[14:35] <NickB1> ?
[14:35] <Darkside> nope
[14:35] <Darkside> its not correct, thats for sure
[14:35] <Darkside> but its such a short distance it doesnt matter
[14:36] <NickB1> true
[14:36] <Darkside> its less than 1/8th wavelength, so it doesn't really matter
[14:36] <NickB1> i came out on a width of 2.1mm
[14:36] <Darkside> that soudns right
[14:36] <Darkside> that trace you see there isnt 2.1mm
[14:36] <Darkside> its just whatever i could fit
[14:37] <Zuph> Darkside: During the K6RPT flight, you mentioned there were two ways to do AFSK with the ADF7012. I'm curious what those are.
[14:37] <NickB1> going to send it over to seeedstudio now :)
[14:37] <NickB1> thanks Darkside
[14:37] <Darkside> np
[14:37] <Darkside> Zuph: one is using the ADF7012 to generatr carrier and modulating the crystal
[14:38] <Darkside> using a varicap diode
[14:38] <Darkside> the other is sending 10101010 continuously in FSK mode and playing around with the data rate
[14:38] <Darkside> so its basically sending a AFSK square wave
[14:38] <Darkside> which is pretty dirty
[14:39] <Zuph> Yeah, version two is the one I was going to try. I think that's what the Big Red Bee tracker does.
[14:39] <Darkside> yeah its dodgy though
[14:39] <Darkside> i'd do the first one
[14:39] <Darkside> much cleaner
[14:39] <Darkside> http://www.silcom.com/~pelican2/PicoDopp/MB_SCH.jpg
[14:40] <Darkside> theres even a reference design there
[14:40] <Zuph> Hey, neat
[14:43] <Zuph> I'll probably fiddle around with the square wave, since the circuit I just built could do that without modification.
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[14:57] <Zuph> Morn', Dan
[14:59] <jcoxon_> ping SpeedEvil
[14:59] <jcoxon_> or fsphil
[15:02] <daveake> I think my new DMM is faulty http://28.media.tumblr.com/tumblr_lqbtuahN9J1qzxfy9o1_500.jpg :)
[15:03] <fsphil> lol
[15:03] <jcoxon_> fsphil, you've got experience with osm?
[15:05] <Laurenceb_> jcoxon_: get my email?
[15:05] <jcoxon_> Laurenceb yup
[15:05] <Laurenceb_> cool, thanks
[15:05] <Laurenceb_> id be hanging about with nothing to do on this project for 6 weeks otherwise :P
[15:06] <Laurenceb_> ill send you one of my new valves back as soon as they get here :D
[15:06] <jcoxon_> what you making?
[15:06] <fsphil> jcoxon_, a little through the osm-gps-map control
[15:06] <Laurenceb_> automated blood pressure cuff
[15:07] <jcoxon_> fsphil, i'm trying to make maps (SVG or PNG) of europe
[15:07] <jcoxon_> i only really need the borders + plotting a track
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[15:08] <fsphil> there used to be a website that generated that exact kind of map
[15:09] <fsphil> I used it to get a plot of the british isles for a possible cut down
[15:09] <fsphil> typically no bookmark, will have a google
[15:11] <fsphil> http://www.ngdc.noaa.gov/mgg/coast/ -- not the one I used, but similar idea
[15:11] <Dan-K2VOL> gpsvisualizer.com perhaps
[15:11] <Dan-K2VOL> gtg
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[15:13] <fsphil> there's an option to return a list of coordinates in a text file
[15:17] <SpeedEvil> jcoxon_: ?
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[15:22] <jcoxon_> SpeedEvil, was going to ask the same question
[15:23] <SpeedEvil> jcoxon_: Ah - missed that
[15:24] <SpeedEvil> You mean you want to generate a high res png of an area, onto which you can project your track?
[15:24] <jcoxon_> i want to gen a low res image but yeah
[15:24] <SpeedEvil> http://www.openstreetmap.org/
[15:24] <jcoxon_> as in so just the vector borders of europe
[15:24] <SpeedEvil> Zoom around
[15:25] <SpeedEvil> then go to export
[15:25] <SpeedEvil> Ah
[15:25] <SpeedEvil> Why are you wanting vector borders?
[15:25] <jcoxon_> well i just want wire-frame borders
[15:25] <jcoxon_> don't need anymore detail
[15:25] <SpeedEvil> ah
[15:26] <SpeedEvil> irc.oftc.net #openstreetmap
[15:27] <SpeedEvil> Sorry - due to my screwed up sleep schedule, I'm mostly asleep
[15:27] <SpeedEvil> yes, it canbe done, no, it's not quite standard.
[15:28] <jcoxon_> okay
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[15:33] <fsphil-laptop> aah you need an image, not the coordinates
[15:33] <jcoxon_> i need an image but i guess i need to be able to overlay coords
[15:33] <jcoxon_> so there'll have to be more infor then just a simple png
[15:33] <jcoxon_> a bit like hte xastir map
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[15:38] <fsphil-laptop> https://commons.wikimedia.org/wiki/File:BlankMap-Europe.svg
[15:38] <fsphil-laptop> any good?
[15:39] <fsphil-laptop> not terribly accurate
[15:39] <jcoxon_> yeah but i'd struggle to overly a gps track on it
[15:39] <jcoxon_> as in if i've got raw numbers
[15:39] <russss> that map is missing bits of Scotland!
[15:40] <fsphil-laptop> http://en.wikipedia.org/wiki/File:Blank_map_of_Europe.svg
[15:40] <fsphil-laptop> much better
[15:40] <fsphil-laptop> the noaa link is your best bet then
[15:41] <jcoxon_> i think i'll go with google earth and kml
[15:41] <fsphil-laptop> this for a website or a program?
[15:41] <jcoxon_> program
[15:41] <jcoxon_> well scripting
[15:42] <fsphil-laptop> can you use osm-gps-map?
[15:42] <fsphil-laptop> it's really handy if you can
[15:42] <fsphil-laptop> ah right, only coastlines though
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[15:43] <Raul_> did anyone here ever use a SPOT GPS?
[15:43] <jcoxon_> i have
[15:43] <Raul_> how did it perform?
[15:43] <jcoxon_> okay
[15:43] <jcoxon_> but doesn't work above 18km
[15:43] <Raul_> yes, like all GPS systems, meybe with Galileo it will be different
[15:43] <jcoxon_> oh no not like all gps systems
[15:44] <jcoxon_> the restriction is implemented in the gps module itself
[15:44] <jcoxon_> there are some modules that work much higher
[15:44] <Raul_> so you don't build an ICBM :(
[15:44] <jcoxon_> check out lasseniq or ublox gps modules
[15:44] <jcoxon_> they work fine above 18km
[15:45] <Raul_> did you pay 150$ for the 1 year subscription + track service?
[15:45] <jcoxon_> i think its $100 but yeah
[15:45] <jcoxon_> its not a cheap option
[15:45] <Raul_> I bought both a SPOT and a TK102 as a backup
[15:46] <jcoxon_> fair enough
[15:46] <jcoxon_> SPOT is a good backup
[15:46] <Raul_> Dose the syrofoam box have to be significantly strong?
[15:47] <Raul_> reenforced with pine rods and things like that
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[15:48] <jcoxon_> no
[15:48] <jcoxon_> most people just use a poly box
[15:48] <jcoxon_> no re-enforcement
[15:51] <Raul_> Ok, I will have a 250g lego shuttle hanging from the box and a GoPro videotaping it
[15:53] <Raul_> I'm trying to reach user Hiena, anyone have contact details?
[15:54] <fsphil-laptop> don't think so, other than the channel
[15:55] <jcoxon_> bbl
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[16:08] <navrac> is there any reason why I can't put my payload in the neck of a 1600g Hwoyee? - I want to measure the differential pressure and it seems the easiest way of getting a sensor in there
[16:13] <fsphil-laptop> it might spin about a bit
[16:13] <fsphil-laptop> with the centre of gravity being inside the balloon
[16:14] <fsphil-laptop> tumble might be a better term
[16:15] <fsphil-laptop> it's been talked about a few times before
[16:15] <navrac> well there would be a chute - but that will be a small one
[16:15] <fsphil-laptop> a differential pressure sensor would get some pretty useful data
[16:15] <fsphil-laptop> you could even put the chute inside the balloon
[16:15] <navrac> I hadnt thought of chutre in the balloon
[16:16] <navrac> but might make it tricky to fill.
[16:16] <fsphil-laptop> yea
[16:16] <fsphil-laptop> unless you had a filling tube going through the payload
[16:16] <fsphil-laptop> although you could pinch the neck near the top (carefully) to keep the helium in
[16:17] <fsphil-laptop> the neck on those balloons is pretty big
[16:17] <navrac> I've got my payload down to under 50g now - but I think a filling tube through the payload would add too much weight
[16:17] <navrac> yep 8.3cm
[16:18] <fsphil-laptop> have it so the tube could be removed just before launch
[16:18] <fsphil-laptop> you'd loose a tiny bit of gas but not much if you do it quickly
[16:19] <navrac> I think it might be good to do it that way as theres less chance of damaging the baloon while sticking the payload in
[16:19] <navrac> whilst its flopping around inflated
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[16:25] <fsphil-laptop> that's always fun!
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[16:34] <number10> anyone launcheng over christmas holidays?
[16:35] <number10> launching
[16:35] <danielsaul> Someone should really launch on Christmas Eve with a superbright red LED... Rudolph payload :)
[16:36] <fsphil-laptop> ooooh
[16:36] <number10> :)
[16:37] <number10> daveake would likely do something like that
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[16:41] <number10> weshould do treasure a treasure hunt, on the weekend of the next conference - a balloon with two payloads and seperate cutdowns - the person who tracks and finds the payload wins a prize
[16:41] <number10> boy I have double vision or typing :(
[16:42] <Darkside> heh we've wanted to do that at a foxhunting comp
[16:43] <Darkside> as something special for the hunters to chase
[16:43] <number10> it would be great I think Darkside - but we all live so far apart - are you over here next summer?
[16:44] <Darkside> yeah, but i dont know how long for
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[16:46] <number10> well I am sure when you are here next there will be at least another record attemp - maye we could plan a hunt as well
[16:49] <Laurenceb_> SpeedEvil: your good with optics right?
[16:49] <Laurenceb_> im trying to couple an led to an optic fibre
[16:53] <number10> any good? Laurenceb_ http://uk.farnell.com/avago-technologies/hfbr-0501/fibre-optic-evaluation-kit/dp/327750
[16:54] <Laurenceb_> high power
[16:54] <Laurenceb_> is what im doing
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[18:17] <danielsaul> http://saul.im/bqbd
[18:18] <danielsaul> ignore
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[19:16] <NigeyS> hey Raul
[19:16] <Raul_> Hi
[19:18] <Raul_> I so wish I get a flight clearance this year :(
[19:18] <NigeyS> that link i gave you no good ?
[19:19] <Raul_> I contacted Hungarian and Romanian ATC beforehand, told me to submit an email with info, did so and now I am painfully waiting
[19:19] <NigeyS> heh good luck, especially this close to Christmas
[19:20] <Raul_> yes :( wish there was no christmas this year...
[19:20] <Raul_> do commercial jets fly on new year's eve?
[19:21] <NigeyS> yups
[19:21] <Raul_> so much trouble for launching a tiny balloon
[19:22] <NigeyS> yip, but better safe than sorry
[19:23] <Raul_> I don't remember, did you launch one nigeys?
[19:23] <NigeyS> i've only done pico launches so far, i have my first full size latex launch end of january
[19:24] <Raul_> cool, got anything on youtube yet?
[19:24] <NigeyS> should be some videos there of the pico launch from august, let me check
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[19:27] <NigeyS> Raul_ http://youtu.be/gI3AU5nL34U
[19:28] <Raul_> haha, partyballoons?
[19:29] <NigeyS> yups, 36" foils
[19:29] <Raul_> what hight did it reached?
[19:29] <NigeyS> well picochu-1 was 3.5km
[19:29] <NigeyS> picochu-2 we lost contact at 7.5km
[19:30] <NigeyS> and picochu-3 .. heh that 1 failed miserably, and burst at 890metres
[19:30] <NigeyS> http://www.ukhas.org.uk/projects:microballoons:data
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[19:45] <cuddykid> btw (just a side note from HAB) - here's a little notification system that I created over past few days - if any of you use MSE then you'll understand :P http://www.wdw4brits.com/mse/subscribe.php
[19:46] <cuddykid> was thinking - we could employ a similar notification for HAB using notifo
[19:46] <cuddykid> get a push notification alerting us when there is a launch, retrieval etc
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[19:55] <hi_im_tom> hello!
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[21:17] <Laurenceb_> nice - octave has proper multicore support
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[21:22] <hi_im_tom> hello, is anyone here?
[21:23] <hibby> nope
[21:27] <hi_im_tom> haha, he
[21:27] <hi_im_tom> *jus
[21:27] <hi_im_tom> damn i can't type - anyway, can i ask you a question?
[21:31] <NigeyS> sure you can, ask away Tom
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[21:34] <hi_im_tom> well, a friend and i are interested in constructing a hab as a project, and we've researched most of it - the balloon itself, the cambridgeshire launch site, insulated payload -- but the hardest bit to plan seems to be the tracking device. the radio method is out of our budget range, so we've been looking into small trac kers (contd)
[21:35] <Raul_> I have a question
[21:35] <hibby> hmm
[21:35] <hibby> radio method is likely much cheaper than you expect
[21:35] <Raul_> is the balloon burst calculator valid for a scientific sales 1500g balloon?
[21:35] <hi_im_tom> (contd) like this http://www.findmespot.com/ (noit that specifically, but that kinda thing - do you reccomend any specific devices
[21:36] <hi_im_tom> to send a stream of updates to a grounded device - sms to phone, message to server etc?
[21:37] <hi_im_tom> really? i have an arduino, but the recievers cost <£150 at least right?
[21:37] <hi_im_tom> plus soldering and coding!
[21:39] <hibby> you might find that if you launch at cambridge, there'll be people willing to help out on lending an rx unit or receiving for you out of pleasure
[21:39] <danielsaul> hi_im_tom: Don't forget that all of us in UKHAS help to track the radio payloads, so even if you don't have a radio to track it is likely other people will -
[21:39] <daveake> My receiver was less than £100. And you could put it back on ebay after the project.
[21:39] <hibby> and soldering's easy
[21:39] <hibby> and that coding's already been done ;)
[21:41] <hi_im_tom> wow, that'd be amazing - i've joined the ukhas mailing list, so if i sent an email asking for tracking help on the day would that be okay (even if my friend and i didn't have a reciever)
[21:41] <daveake> Yes, you'll get several people helping, sometimes 10 or more
[21:42] <hi_im_tom> and about the coding - i've seen some of it in upu's guide, but iirc it's not complete - is there anywhere i can find could that i could import straight into the arduino program and go (i know that's asking a bit much, but you never know :) )
[21:43] <hi_im_tom> @dave - that's excellent, thanks (in advance haha, i don't plan to launch for a few months ! )
[21:44] <danielsaul> hi_im_tom: The code does all depend on the components that you decide to use - are you up to sorting your own circuit and gps tc. out? How much experience do you have with electronics?
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[21:52] <hi_im_tom> i must admit i have limited electronics experience, but i am (at risk of sounding arrogant) a fast learner, and so i should be able to design a simple circuit with (hopefully) a little help. i'm planning on using a radiometrix ntx2 (is that the correct model?) gps unit.
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[21:53] <danielsaul> Great - the ntx2 is actually the radio transmitter
[21:53] <danielsaul> there are various gps units thats various people use
[21:53] <danielsaul> I'd advise you to take a look at other people's circuits etc., many of which can be found floating around on github
[21:54] <Raul_> Can anyone answer my question? is a balloon calculator prediction based on the 1500g Kaymont valid for a 1500 ScientificSales balloon?
[21:55] <danielsaul> hi_im_tom: Take a look at https://github.com/ApexHAB/apex-alpha/raw/master/pcb/rev1.0/schematic.png which is the latest payload of the team that I'm a part of
[21:55] <danielsaul> Have to go now, bbl
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[21:58] <NigeyS> Raul_ i think the SS are just resellers of kaymont .. not 100% sure though
[21:58] <Raul_> Thx NigeyS
[21:59] <Raul_> sorry, dose it also show up for you when I click on someone's name and it shows info about him?
[22:00] <NigeyS> no
[22:04] <Raul_> can you instruct me on how to adress a specific user?
[22:06] <NigeyS> sure type /msg <username>
[22:06] <NigeyS> without the <> :)
[22:07] <hi_im_tom> looking at the schematic now :)
[22:08] <Raul_> a beer to sir NigeyS!
[22:08] <hi_im_tom> from my n00b eyes, it looks like an arduino w/ temp sensor and sd card, with a gps system connected to a radio transmitter?
[22:09] Action: NigeyS takes a bow
[22:10] <danielsaul> hi_im_tom: Yep, thats correct - probably not the best example component-wise since it is primarily surface mount stuff
[22:12] <hi_im_tom> so, which components would you recommend we get? and how would i test the assembly without a radio reciever?
[22:13] <danielsaul> ah... testing... Hmm
[22:14] <danielsaul> I've actually got to go now, but I'm sure someone else here will take over... Bye
[22:15] <hi_im_tom> bye, and thanks
[22:17] <daveake> I was in that position, and test up a test system using an NRX2 to receive the transmissions, feeding a signal generator to create the 2 tones that a receiver would generate. Frankly, it's a lot easier to buy a proper receiver!
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[22:22] <hi_im_tom> fair play, i think i will then - which model you reccomend? all i'm looking for would be cheap and works for the balloon project
[22:23] <hi_im_tom> *recommend
[22:23] <daveake> I just went from the list in the ukhas tracking guide, and watched ebay for a while. Bought an AR8000 which is a handheld scanner. Has served me well.
[22:24] <daveake> I'm not a radio ham but plenty of people here are, and they may have more advice
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[22:26] <hi_im_tom> one of these? http://www.google.co.uk/products/catalog?q=ar8000&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&tbm=shop&cid=8203081724406168572&sa=X&ei=0xbtTq_XCrTP4QTy8rD7CA&ved=0CEMQ8wIwAQ
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[22:26] <daveake> Nooo... one of these - http://www.ebay.co.uk/itm/AOR-AR8000-1000-channel-scanner-/120830321957?pt=UK_ConsumerElectronics_SpecialistRadioEquipment_SM&hash=item1c220c6525#ht_1556wt_1132
[22:27] <daveake> That's not a bad price actually, as it includes batteries, charger, aerials
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[22:32] <hi_im_tom> sure there aren't any cheaper models, or would you recommend that one in particular?
[22:33] <daveake> Like I said, not my area really. That's the only one I've ever used. You might get lucky but I doubt you'll get anything below £80 (which is what I think I paid for mine)
[22:34] <cuddykid> hi_im_tom: Hiya, just a quick note from me. I originally explored a variety of different comm methods - in the end, the ntx2 method is by far the easiest and cheapest :) everyone can track your payload too then
[22:34] <hi_im_tom> ok, thanks for your help :) i've gtg now anyway, bye!
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[00:00] --- Sun Dec 18 2011