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[00:08] <dayz> anyone still awake?????????????
[00:10] <dayz> ?
[00:10] <dayz> s
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[00:25] <fsphil> plotting the local sonde as HADIE on spacenear
[00:25] <fsphil> coordinates are not terribly accurate
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[00:26] <Darkside> hehe
[00:27] <Darkside> fsphil: what interface are you using?
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[00:27] <fsphil> rjh's web form :)
[00:27] <Darkside> i mean, to get the data from sondemonitor
[00:27] <fsphil> ah, I'm tailing the log file
[00:28] <Darkside> ahh ok
[00:28] <Darkside> i used the COM/OLE interface
[00:28] <fsphil> that doesn't work so well in wine
[00:28] <Darkside> yeah it wouldn' t:P
[00:29] <Darkside> this was so i could link it into our existing mapping software
[00:29] <fsphil> yea, the oz thing
[00:29] <Darkside> yeah
[00:29] <Darkside> i just impersonated dl-fldigi
[00:29] <fsphil> is it as jittery in that as this is?
[00:29] <fsphil> these coordinates are all over the place
[00:30] <Darkside> lolwat
[00:30] <Darkside> thats screwed
[00:30] <fsphil> possible sondemonitor doesn't do any checks on the log files
[00:30] <r2x0t> try rinex data for GPS
[00:30] <fsphil> it might have some sanity checks on the fake gps output
[00:30] <r2x0t> it helps a lot
[00:30] <r2x0t> usually getting <10m fix with that
[00:31] <r2x0t> also look if there is any way to plot only good CRC packets
[00:31] <Darkside> fsphil: so i take it you're grabbing the almanac from somewhere?
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[00:31] <fsphil> yea I got it from... http://www.navcen.uscg.gov/?pageName=gpsAlmanacs
[00:34] <fsphil> down she comes
[00:36] <r2x0t> ftp://igs.bkg.bund.de/EUREF/obs/2012/166/foyl1660.12n.Z
[00:36] <r2x0t> this is rinex
[00:36] <r2x0t> download, ungzip
[00:37] <fsphil> got it
[00:38] <fsphil> installed
[00:38] <r2x0t> 166 is GPS day, FOYL is some station I found near you, map is here http://www.epncb.oma.be/_networkdata/stationmaps.php
[00:39] <r2x0t> 12N = 2012 + N=ephemerides
[00:39] <r2x0t> Easiest is to make small script that downloads and ungzips correct file before launch
[00:40] <r2x0t> disadvantage is this file is valid for maybe 2 hours
[00:41] <fsphil> sondemonitor moved its log file, tailing the new location
[00:41] <fsphil> so far that's better
[00:42] <r2x0t> looks good on map
[00:43] <r2x0t> or not
[00:43] <fsphil> this is going to land behind some mountains, I'm gonna loose it fairly high up
[00:43] <fsphil> ah, glitch
[00:44] <r2x0t> do you have enabled in menu Options / CRC Check ?
[00:44] <r2x0t> when checked, it saves only good data
[00:45] <fsphil> I had not
[00:45] <fsphil> enabled now
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[00:45] <fsphil> that's better
[00:46] <fsphil> or not
[00:46] <fsphil> it was going so well
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[00:55] <fsphil> put an upper limit on the gps residual value
[00:56] <fsphil> won't upload if greater than 60m
[00:56] <fsphil> I'm about to lose it
[00:57] <fsphil> gone
[00:58] <fsphil> silly mountain
[00:58] <fsphil> well that worked
[00:58] <fsphil> sorta
[00:58] <r2x0t> do you see these wrong positions in SM map ?
[00:59] <fsphil> SM's map kills the program in wine
[00:59] <r2x0t> lol
[00:59] <r2x0t> ok
[00:59] <fsphil> I've a windows vm, will try it on that next time
[00:59] <r2x0t> you can also try using the google earth live data
[00:59] <r2x0t> it's TCP/HTTP
[00:59] <r2x0t> not sure if that is filtered
[00:59] <fsphil> ooh
[01:00] <r2x0t> or just add position filter to your program
[01:00] <fsphil> google earth listens on a port?
[01:00] <r2x0t> elliminate too big jumps
[01:00] <r2x0t> no, GE does HTTP requests to TCP server in SM
[01:00] <fsphil> ah, the other way around
[01:00] <r2x0t> options/google earth/live GE server
[01:00] <r2x0t>
[01:03] <fsphil> I'll try that for tomorrow nights launch
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[01:11] <smrtz> Hey, is Upu here?
[01:15] <smrtz> Or at least someone who can help with a Max 6?
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[01:32] <dayz> hey guys you awake??
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[01:44] <Darkside> nope
[01:50] <dayz> :(
[01:50] <dayz> wake up dammit
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[02:04] <dayz> anyone ever build a trackuino?
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[03:17] <Darkside> dayz: yes
[03:17] <Darkside> well
[03:17] <Darkside> i made my own pcb
[03:17] <Darkside> and forked their code
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[06:16] <eroomde> morning
[06:16] <Darkside> hey eroomde
[06:16] <Darkside> http://i.imgur.com/qVjHc.jpg
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[06:21] <eroomde> nice!
[06:21] <eroomde> and the specan
[06:21] <eroomde> i want
[06:21] <Darkside> network analyzer
[06:22] <Darkside> its a agilent VNA
[06:22] <Darkside> http://i.imgur.com/ZMxjy.jpg
[06:22] <Darkside> i've got a SAW filter to go on one of the boards - about 10MHz BW centered on 434MHz
[06:23] <Darkside> that should make a nice frontend for a rtl-sdr
[06:23] <Darkside> will stop intermod issues and increase the sensitivity a bit
[06:23] <eroomde> cool
[06:23] <eroomde> impressive stuff
[06:24] <Darkside> with a bit of software work, we should be able to produce some pcbs which can be added onto a rtl-sdr board to make a cheap balloon receiver
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[06:24] <Darkside> and given the RTL-SDRs can sample at 2MSPS, we can receiver all balloons in the air using one receiver
[06:25] <eroomde> waaahoooer
[06:25] <eroomde> that sounds a bit not true
[06:25] <Darkside> i mean, if they;re on different frequencies
[06:25] <eroomde> even still
[06:25] <Darkside> 434.075 and 434.650MHz for example - they'll fall within the passband of the receiver
[06:25] <Darkside> its just a demodulation problem then
[06:26] <eroomde> unless theyre all at the same range so the energies reaching the receiver are the same, i dont thik the adc has nearly eniugh dynamic range to capture both a near and a far balloon
[06:26] <eroomde> and 8 bits doesnt give you many db's
[06:26] <Darkside> very true
[06:26] <Darkside> that is a problem
[06:26] <Darkside> its something to play with though
[06:27] <Darkside> and it still makes a very cheap receiver for a single balloon
[06:27] <eroomde> yes agree with you there
[06:27] <Darkside> all up cost would be about AUD$50
[06:27] <Darkside> software side on windows is fairly easy to deal with
[06:27] <Darkside> a bit harder to get going on linux
[06:28] <Darkside> though its just a matter of playing with jack
[06:30] <eroomde> more complexicated than gnuradio?
[06:30] <Darkside> well gnuradio would be doing the demodulation part
[06:30] <Darkside> the demodulated audio gets piped out into jack, then into fldigi
[06:30] <Darkside> what would be cool is a dedicated input source for fldigi
[06:31] <Darkside> an option to receive from one of these rtl-sdrs
[06:31] <Darkside> just need to do SSB demodulation
[06:31] <eroomde> ah yes i see
[06:32] <eroomde> hail and thunder today says the radio
[06:32] <eroomde> whopie
[06:32] <Darkside> hehe
[06:32] <Darkside> hope its nicer when i get there
[06:32] <Darkside> flying over mid august
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[06:35] <eroomde> ah cool
[06:35] <eroomde> for how long?
[06:35] <Darkside> until teh end of september
[06:36] <eroomde> nice
[06:36] <eroomde> well i live in ox now should u want to visit it
[06:37] <Darkside> cool
[06:37] <Darkside> yeah i've seen your new place
[06:38] <Darkside> or have you moved since then
[06:38] <eroomde> oh gosh yes it was just as i moved wasnt it
[06:38] <eroomde> yeah still there
[06:38] <Darkside> yup
[06:38] <Darkside> ok
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[07:13] Nick change: UpuWork- -> UpuWork
[07:13] <UpuWork> morning
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[07:29] <UpuWork> interesting Cosycave will only allow you to purchase on dongle at once
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[07:40] <daveake> UpuWork This one - https://www.cosycave.co.uk/product.php?id_product=220 ?
[07:41] <UpuWork> That one should do it
[07:41] <UpuWork> https://www.cosycave.co.uk/product.php?id_product=104
[07:41] <UpuWork> I'm using this one
[07:42] <Darkside> hey UpuWork
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[07:42] <Darkside> i've got my filter board done
[07:42] <UpuWork> does it work ?
[07:42] <Darkside> http://i.imgur.com/qVjHc.jpg
[07:42] <daveake> Well on the one I listed you can select 2 but 10 says "not enough stock"
[07:42] <Darkside> i haven't tried it with the SAW filtere yer
[07:42] <Darkside> will put one of those on now
[07:42] <Darkside> but without it i'm getting 21dB gain at 70cm
[07:43] <UpuWork> impressive :)
[07:43] <Darkside> just tryin gto find my saw filters now
[07:44] <bambi> hello everyone
[07:44] <UpuWork> morning/evening bambi
[07:44] <UpuWork> braving IRC again ?
[07:44] <Darkside> hi bambi
[07:44] <bambi> *smiles*
[07:44] <bambi> yes trying to get used to it
[07:45] <UpuWork> you can change the font in most clients if its annoying you :)
[07:45] <bambi> Thank you I have
[07:45] <UpuWork> :)
[07:45] <UpuWork> let me know how it goes Darkside but thats impressive
[07:45] <bambi> 2ne used receiver arrived yesterday via ebay - for back up
[07:45] <UpuWork> which one did you get ?
[07:46] <bambi> backup is a 1996 Icom IC-R10
[07:46] <Darkside> hah
[07:46] <Darkside> use that as your primary
[07:46] <UpuWork> lol
[07:46] <Darkside> its what i use
[07:46] <UpuWork> can be no greater recommendation
[07:47] <bambi> also I purchased some extruded polystryne for the capsule construction
[07:47] <bambi> oh the Icom is better than the Yaesu VR-500?
[07:47] <Darkside> dunno about better
[07:47] <Darkside> but its what i've been using for all my ballooning stuff
[07:47] <Darkside> they work very well
[07:47] <bambi> well I have both - great to know
[07:48] <bambi> I am building a 4 el yagi from pdf online
[07:48] <Darkside> good
[07:48] <Darkside> the R10 is good for DFing too
[07:49] <Darkside> that is, where you swing the yagi around and listen for the signal increasing and decreasing
[07:50] <bambi> oh great to know - it came in a boc and all the plastic is unopened loosk like never used
[07:50] <bambi> box*
[07:50] <Darkside> how much did you pay?
[07:51] <bambi> oh woth swinging the yagi you listem for the weakest signal is that right?
[07:51] <Darkside> nah
[07:51] <Darkside> the signal will be strongest when you have the yagi pointing at the transmitter
[07:52] <bambi> $198.01 USD
[07:52] <Darkside> so as you dwing it, you should hear the signal get stronger as you swing towards it, then weaker as you mvoe away
[07:52] <Darkside> shit
[07:52] <Darkside> thats a good deal
[07:52] <Darkside> i paid $280 for mine
[07:52] <bambi> oh lucky me
[07:52] <bambi> well I have no transmitter at the moment so ...
[07:53] <fsphil> that amp board looks good Darkside
[07:55] <UpuWork> I just noticed the picture
[07:55] <UpuWork> HABAmp :)
[07:55] <bambi> the antenna I build is this one http://www.antentop.org/004/files/434.004.pdf
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[07:58] <Darkside> ugh, these SAW filterd are a pain to solder
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[07:59] <Darkside> awesome, max 0V DC voltage rating
[07:59] <Darkside> that means i can't beep it out with a multimeter
[07:59] <bambi> are there any launches planned for this weekend?
[07:59] <fsphil> so it *might* be soldered ok
[08:00] <fsphil> there may be a launch this sunday in england
[08:00] <fsphil> weather's not looking too hot though
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[08:00] <UpuWork> Ithink there might be a launch this weekend but its jcoxon you'll need to speak too
[08:00] <UpuWork> who conveniently just joined
[08:00] <jcoxon> hello
[08:00] <UpuWork> :)
[08:00] <UpuWork> morning
[08:01] <fsphil> morn jcoxon
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[08:02] <jcoxon> if we are launching it'll be sunday morning
[08:02] <bambi> cool I will follow here in Australia via spacenear.us
[08:03] <jcoxon> but its going to be pretty windy here so there is a chance it'll be cancelled
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[08:03] <fsphil> we finally got the windy weather last night
[08:04] <bambi> ococon> I hope all goes well for you
[08:05] <fsphil> launching in gales is no fun :)
[08:05] <bambi> yes i bet
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[08:06] <fsphil> my last launch was windy, and at one point I think the balloon was wrapped around me while I was filling it
[08:06] <jcoxon> we can fill inside the barn which hels
[08:06] <jcoxon> helps*
[08:06] <fsphil> I got covered in the powder
[08:06] <fsphil> that balloons seem to have
[08:07] <jcoxon> yeh i wouldn't inhale that
[08:07] <fsphil> it was raining so it didn't get spread around much
[08:10] <bambi> I am looking at ballons for my first launch - may I ask for any reccommendations on type etc? The Japan produced one seems to be popular?
[08:11] <UpuWork> The Totex/Kaymont balloons are more consistant
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[08:11] <UpuWork> if you like to live on the edge try a Hwoyee
[08:11] <bambi> < is conservative :)
[08:11] <bambi> yes Totex
[08:12] <bambi> it is interestesting that the Totex spec page has most burst size diameter less than 2m - or am I reading them incorrectly?
[08:12] <UpuWork> I suspect thats not correct
[08:13] <Darkside> ok i *think* the filter is working
[08:13] <Darkside> having troubles getting my tuner to play nicely with windows atm
[08:13] <Darkside> so i can't test it properly
[08:13] <Darkside> ill head into the city early before hackerspace tomorrow and put the amp on a network analyser
[08:14] <Darkside> well, if i can get to one
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[08:18] <Darkside> ok its definitely having a bandpass effect
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[08:35] <Darkside> UpuWork: http://i.imgur.com/hmsFu.jpg
[08:35] <Darkside> theres the promo shot :P
[08:36] <jcoxon> very smart
[08:36] <jcoxon> when can we buy one...
[08:36] <Darkside> well let me test it properly first
[08:36] <Darkside> need to stick it on a network analyzer
[08:36] <Darkside> and check the SAW filter is doing whats its meant to be
[08:37] <Darkside> UpuWork can handle the UK distribution :P
[08:37] <jcoxon> useful for a FCD as well?
[08:38] <Darkside> yep
[08:38] <Darkside> the configuration you see there can be powered from the funcube dongles bias tee
[08:38] <Darkside> with other configurations, you can power it off a higher voltage either on the power socket, or up the coax
[08:41] <jcoxon> cool
[08:42] <UpuWork> looks good Darkside
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[08:42] <UpuWork> just let me know if your happy with it we'll come to some arrangement
[08:43] <UpuWork> I wonder if we could just case the lot dongle and all
[08:44] <Darkside> perhaps
[08:44] <Darkside> the board is designed to fit inside a Hammond 1590H enclosude
[08:44] <Darkside> enclosure*
[08:45] <UpuWork> I see what you've done with the power, could just have a short patch internally
[08:45] <eroomde> with flanges
[08:45] <eroomde> for screwing to a brick wall?
[08:45] <Darkside> eroomde: eh?
[08:45] <eroomde> the hammonf case
[08:45] <Darkside> probably not
[08:45] <fsphil> external power's fine? my fcd doesn't have the tee
[08:45] <Darkside> but i'm sure you could sort something out
[08:45] <Darkside> fsphil: yes
[08:45] <Darkside> fuck i'm going to need to do a full writeup on this aren't i
[08:46] <fsphil> nice. you've definitely sold at least two UpuWork :)
[08:46] <UpuWork> 4 I want one and daveake's just bought 2 dongles
[08:46] <Darkside> haha
[08:46] <UpuWork> have you not sent me the gerbers yet Darkside ? :)
[08:46] <Darkside> nope
[08:46] <Darkside> get altium designer installed already
[08:47] <fsphil> lol
[08:47] <eroomde> make it open source and we can transmogirfy the layout into eagle :)
[08:47] <fsphil> ooh nice shiny board
[08:48] <Darkside> eroomde: bugger off
[08:48] <Darkside> i avoid eagle likt the plague
[08:48] <UpuWork> <3 Eagle
[08:48] <Darkside> only professional design tools for me >_>
[08:48] <eroomde> for me, eagle is like an arranged marriage
[08:48] <eroomde> not so much lust at first sight as an appreciation or at least an acceptance that comes with time
[08:49] <Darkside> haha
[08:49] <UpuWork> lol
[08:49] <UpuWork> second that
[08:49] <fsphil> so it's like loosing a limb, you adapt
[08:50] <fsphil> but it hurts at first
[08:50] <fsphil> and the first go is always a bloody mess
[08:51] <fsphil> (i'm at that stage)
[08:52] <number10> I am at the stage where I dont really want to loose an arm
[08:52] <number10> when are you coming to uk Darkside ?
[08:52] <fsphil> the full version of eagle costs and arm *and* a leg
[08:53] <jonsowman> morning all
[08:53] <UpuWork> morning
[08:53] <number10> morning
[08:53] <fsphil> hiya jonsowman
[08:53] <jonsowman> anything exciting going on?
[08:53] <fsphil> Darkside made a cool thing
[08:54] <UpuWork> http://i.imgur.com/hmsFu.jpg <-
[08:54] <UpuWork> shiny
[08:54] <jonsowman> oh nice
[08:54] <eroomde> ah the classic hako 888 iron
[08:54] <eroomde> nearly got one myself
[08:54] <eroomde> but holding out for the same weller i have at work cos it's lovely
[08:54] <eroomde> oh yeah and the pcb is alright too
[08:54] <fsphil> I'm beginning to think my iron is very very low end
[08:55] <eroomde> it's amazing how useful a good iron is
[08:55] <jonsowman> agreed
[08:55] <eroomde> things that make you think 'oh god f*ck that* when you see a package on farnell that is otherwise useful suddenly become quite doable
[08:56] <Darkside> ok i gottsa go
[08:56] <Darkside> back later guys
[08:56] <jonsowman> i need to put an SMA on my rtl dongle
[08:56] <eroomde> likewise a hot air gun is a realy useful purchase for reworking boards, especially desoldering large packages. highly recommend
[08:56] <jonsowman> eroomde: yeah it was so useful for reworking joey yesterday
[08:56] <jonsowman> the cusf one
[08:56] <eroomde> the cusf one = eroomde's one
[08:57] <eroomde> :)
[08:57] <jonsowman> haha didn't know that
[08:57] <jonsowman> do you want it back?
[08:57] <eroomde> yeah, the old aoyue iron and hot air rework station is mine
[08:57] <eroomde> nah, i've got facilities at work that are good so i'm quite happy for it to be at cusf where it'll be more useful
[08:58] <jonsowman> okay thanks, if you ever want it back give us a week's notice so we can buy another
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[08:58] <eroomde> willdo
[08:58] <jonsowman> we need a new scope
[08:59] <eroomde> i'd probably rather get the weller and a discrete hot air gun after
[08:59] <eroomde> what's wrong with the current scope?
[08:59] <jonsowman> one of the channels died
[08:59] <eroomde> it's an old tektronix one sort of borrowed one night from what was the deployable structures lab i think
[08:59] <jonsowman> heh
[08:59] <eroomde> tektronix stuff is surprisingly fixable though, note
[08:59] <jonsowman> yeah someone tried disassembling
[08:59] <eroomde> the pcb's are labelled really well and the service manuals are thorough
[09:00] <jonsowman> i might give it a go
[09:00] <eroomde> but yeah that scope probably has had a fairly tough life
[09:00] <eroomde> structures people shouldn't be allowed near scopes
[09:00] <jonsowman> haha
[09:00] <eroomde> just give them big adjustable spanners
[09:00] <jonsowman> :D
[09:01] <jonsowman> we agreed that if we got one of the bigger sponsor launches recently we'd get a shiny new one
[09:01] <eroomde> nice
[09:01] <jonsowman> and we did, so we'll get one soon probably
[09:01] <eroomde> the £250 ebay chinese ones or a super mega?
[09:01] <bambi> meal time for me so chat with you all later
[09:02] <eroomde> we have a rhode and schwartz thing at work whose screen is about the size of my dell monitor
[09:02] <jonsowman> eroomde: probably around the £500 mark i imagine
[09:02] <eroomde> and it's like 4ch 5Gsps
[09:02] <jonsowman> that must be.. not cheap
[09:02] <eroomde> and has a logic analyser built in too
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[09:02] <jonsowman> impressive
[09:02] <jonsowman> hate to think what that cost
[09:03] <eroomde> but the coolest thing is that each of the backlights for the translucent rubber buttons is an rgb led and there's a menu that lets you set the #RRGGBB of each button individually
[09:03] <jonsowman> :o
[09:03] <eroomde> yeah it costs about as much as a deposit for a big house
[09:03] <jonsowman> okay that's totally worth the several thousand
[09:03] <eroomde> several tens of thousands
[09:03] <jonsowman> :|
[09:04] <eroomde> and it's a touchscreen too which is nice
[09:05] <eroomde> it's this one i think
[09:05] <eroomde> http://www.testandmeasurementtips.com/test-equipment/rohde-schwarz-introduces-4-ghz-rs-rto1044-oscilloscope/
[09:05] <jonsowman> so pretty
[09:05] <eroomde> it's not actually ours
[09:06] <eroomde> just borrowed it for peering at some advanced piece of foo james had to make that needed 1ns rise times at high voltages for something to do with beam forming
[09:06] <jonsowman> sounds cool
[09:06] <jonsowman> :)
[09:06] <eroomde> there is a little of woo that gets a bit tiresome with that kind of thing
[09:07] <eroomde> looking at signals without completely changing them becomes an artform
[09:07] <jonsowman> yeah
[09:07] <eroomde> trying to characterise the inductance of 0402 passives because a week long task as part of the design challenge
[09:07] <eroomde> etc
[09:07] <jonsowman> i can see how that would get tiresome
[09:08] <eroomde> uhuh
[09:08] <eroomde> easier to stick to RF :)
[09:08] <eroomde> which is saying something
[09:08] <jonsowman> haha
[09:08] <jonsowman> not often that gets said
[09:09] <jcoxon> eek
[09:09] <jcoxon> so the plan is to launch eurus 2 this weekend
[09:10] <jcoxon> with a valve to vent some He to aim for a lower float altitude
[09:10] <jonsowman> good stuff
[09:10] <jonsowman> which day?
[09:10] <jcoxon> well the gales are an issue...
[09:10] <jcoxon> but i'm hoping sunday morning early
[09:11] <jonsowman> cool
[09:11] <jcoxon> once at altitude it'll be a slow float
[09:11] <jonsowman> i won't be able to track i'm afraid, moving home that day
[09:11] <jcoxon> and the path depends greatly on what altitude we'll be at
[09:11] <eroomde> would be fun to get pictures of a big cyclonic storm from above
[09:12] <jcoxon> :-)
[09:12] <jcoxon> stormhab
[09:12] <eroomde> another thing on the list of longness
[09:13] <jonsowman> i've had to make a list of todo lists
[09:13] <eroomde> meta
[09:13] <jonsowman> it's got to that stage
[09:13] <jonsowman> :(
[09:13] <eroomde> yeah i can't keep the balance between work projects and personal projects
[09:13] <eroomde> keeping track of everything is too much
[09:14] <jonsowman> yeah
[09:15] <jcoxon> so if we can get eurus2 to float at 22000m roughly
[09:15] <jcoxon> it'll get to iceland
[09:15] <jcoxon> in 96hrs :-p
[09:16] <eroomde> nice
[09:17] <jcoxon> via the faroes
[09:17] <jcoxon> so in theory we could track all the way
[09:17] <eroomde> they'll probably think it's a witch and sacrifice some goats
[09:17] <jcoxon> its a big IF though
[09:17] <jcoxon> eroomde, send you as our ambassador
[09:17] <eroomde> not that i'm judging the people of the faroes
[09:18] <benoxley> jcoxon: have you got any pictures of your valve mechanism?
[09:18] <jcoxon> benoxley, steve is working on it
[09:18] <jcoxon> its similar to your design
[09:18] <jcoxon> bigger vent hole though
[09:19] <benoxley> what kind of cross-section?
[09:20] <jcoxon> not sure
[09:20] <jcoxon> haven't actually seen it
[09:20] <benoxley> oh right
[09:21] <benoxley> any pics of the first setup?
[09:21] <benoxley> (sorry for all te questions)
[09:22] <jcoxon> let me look
[09:25] <benoxley> thanks jcoxon
[09:25] <jcoxon> benoxley, nothing
[09:25] <jcoxon> sent steve an email
[09:26] <jcoxon> i mean - send steve an email
[09:26] <benoxley> will do
[09:26] <benoxley> thanks for looking
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[10:07] <thecduck> does anybody know an example PHP script for validating a payload radio sentence using CRC16-CCITT?
[10:11] <jonsowman> http://www.nongnu.org/avr-libc/user-manual/group__util__crc.html#gaca726c22a1900f9bad52594c8846115f
[10:11] <jonsowman> see crc_xmodem_update
[10:11] <jonsowman> that's the C version in avr-libc
[10:12] <jonsowman> you can port that to PHP easily
[10:16] <thecduck> thanks, i'll have a look
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[10:29] <Lunar_LanderU> hello
[10:31] <fsphil> olleh
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[10:35] <nosebleed_> fsphil
[10:35] <eroomde> lihpsf
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[10:36] <fsphil> sounds like a medical condition
[10:36] <Lunar_LanderU> xD
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[10:51] <number10> demo roe
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[11:14] <daveake> So Google send me an email re possible Google+ friends ...
[11:14] <daveake> ... and gmail classes it as spam lol
[11:14] <Darkside> derp
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[11:25] <The-Compiler> daveake: :D
[11:28] <joph> lol
[11:28] <joph> google mail also marks a email as spam if i send it from one mail adress of a domain to the same domain but another adress :D
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[11:49] <Darkside> anyone here know anything about hardware licenses
[11:49] <Darkside> like, what license should i release my HABAmp gerbers and source files under
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[11:50] <joph> i prefer the CC license
[11:51] <joph> CC BY-NC-SA 3.0
[11:51] <Darkside> yeah i was wondering if that applied to this
[11:51] <Darkside> i mean, to hardware
[11:51] <joph> for "lower" stuff something like CC BY 3.0
[11:51] <joph> i think so
[11:51] <joph> i use them for hardware
[11:51] <joph> why not?
[11:51] <Darkside> dunno
[11:51] <Darkside> heh
[11:52] <Darkside> i'm just cleaning up my schematic
[11:54] <UpuWork> http://wiki.openhardware.org/Recommended_Licenses
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[11:56] <nick_> eroomde: did you know there's an raspberry pi meetup near the ringroad next week?
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[12:44] <eroomde> nick_: i didn't!
[12:44] <eroomde> where abouts?
[12:44] <eroomde> do you have a link to some info?
[12:46] <nick_> http://www.meetup.com/Oxon-RaspberryPi/
[12:50] <eroomde> ta
[12:51] <nick_> I didn't know RS has a place here.
[12:51] <nick_> (and the whole design spark thing confuses me a little)
[12:52] <nick_> Such sites really should just communicate with a real social networking site, I think.
[12:52] <eroomde> i think a lot of the 'initiatives' by the components suppliers are a bit more heat than light
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[13:01] <nick_> If only RS could bankroll some hackerspace for me...
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[13:19] <Laurenceb> arg
[13:19] <Laurenceb> too much web 2.0
[13:21] <eroomde> ?
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[13:32] <nick_> I just have too much fragmentation and wonder when google will just take over.
[13:32] <nick_> So I don't have to have 20 different accounts on sites that I occassionally use, with no simple interface between them.
[13:41] <cuddykid> hmm - does anyone here happen to have a HP proliant microserver?
[13:41] <cuddykid> ?
[13:41] <cuddykid> for £130 it seems a fairly decent buy
[13:42] <UpuWork> yeah they are pretty good
[13:42] <cuddykid> I'm guessing it requires a monitor to install linux on it? don't think I can connect this mac monitor to it
[13:44] <eroomde> i've never met anyone who actually bought a mac monitor before
[13:44] <cuddykid> lol
[13:45] <cuddykid> they're decent but highly annoying when it comes to connecting anything but a mac
[13:45] <cuddykid> got a new MBA yesterday - flies with SSD
[13:46] <UpuWork> cuddykid my engineer who has one says for home server fine, for nas box fine, just may annoy you if yuo plan to stick it behind your TV
[13:46] <UpuWork> it hums
[13:47] <cuddykid> UpuWork: thanks for the heads up! :)
[13:47] <cuddykid> think I'll pop it out the way
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[13:47] <cuddykid> just trying to think how I'm going to get software on it setup without spending extra money on monitor
[13:48] <UpuWork> jsut borrow a monitor ?
[13:48] <SpeedEvil> Pop out the disk, image, put back
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[13:49] <cuddykid> guess I could
[13:49] <eroomde> serial port
[13:49] <UpuWork> yeah it will output to serial
[13:49] <UpuWork> but borrow a monitor
[13:49] <cuddykid> ahh ok, thanks :)
[13:49] <cuddykid> once it's all set with linux it should be fine
[13:50] <UpuWork> well I just installed Centos remotely but mine was on a proper server with an iLO :)
[13:51] <fsphil> ooooeeee
[13:53] <daveake> cuddykid - Yes, got one here
[13:53] <daveake> Nice little unit
[13:54] <daveake> Ubuntu / raid NAS box for me
[13:55] <cuddykid> great, will get one this afternoon I thkn
[13:55] <cuddykid> 
[13:55] <daveake> I use the supplied drive toi boot from, and 4 2TB drives for the RAID
[13:58] <fsphil> I've went to a much smaller machine for my server now, saves on electricity
[13:58] <eroomde> +1 for that
[13:59] <eroomde> was gonna try a raspi on our tv for xbmc and random old server
[14:02] <fsphil> I've never tried xbmc
[14:02] <fsphil> heard good things about it
[14:02] <eroomde> mw two
[14:02] <eroomde> me too*
[14:03] <eroomde> especially with smartphone apps to act as a remote over wifi
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[14:10] <number10> UpuWork: I changed your callsign in the members page while I was there
[14:22] <UpuWork> oh thanks, I noticed you'd decided to become a member :)
[14:22] <UpuWork> fair to say you've passed the entrance exam practical number10
[14:23] <number10> wasnt too sure how, untill daveake told me - I thought there was some sort of initiation
[14:23] <UpuWork> lol
[14:23] <number10> cheers UpuWork
[14:24] <WillDuckworth> suppose i should put something on there - been floating in and out for a while now
[14:24] <UpuWork> yeah
[14:26] <eroomde> oh yeah
[14:26] <eroomde> there's that member page
[14:27] <eroomde> teehee HARVe
[14:27] <eroomde> http://ukhas.org.uk/projects:parafoil
[14:27] <Laurenceb> bah i should fly my rogallo
[14:27] <Laurenceb> too much other nonsense to do
[14:28] <eroomde> always the way
[14:28] <Laurenceb> maybe ill just chuck a ublox6 on there and stick it to a baloon some time
[14:28] <Laurenceb> ooh look a ublox6, 5cm left of my keyboard
[14:29] <nick_> eroomde: you booted up your pi yet?
[14:29] <Laurenceb> no
[14:29] <Laurenceb> the power to oxford is still working
[14:29] <eroomde> http://ukhas.org.uk/_detail/projects:parafoil:front.jpeg?id=projects%3Aparafoil%3Atwo
[14:29] <eroomde> so that's jcoxon's laptop
[14:29] <eroomde> showing the cam uni webmail
[14:29] <Laurenceb> heh
[14:29] <eroomde> which means this was taken while james was still an undergrad
[14:30] <Laurenceb> yes
[14:30] <number10> that looks like a largish payload eroomde
[14:30] <eroomde> old skool
[14:30] <eroomde> [crocodile dundee voice]: that's not a large payload
[14:30] <number10> there were larger that you want to talk about?
[14:30] <Laurenceb> http://ukhas.org.uk/_media/projects:ukhas_glider_project:pict7924.jpg?w=750
[14:30] <Laurenceb> ^thats a proper payload
[14:31] <number10> it looks nice Laurenceb
[14:31] <nick_> At what altitude will a glider work, I wander...
[14:31] <Laurenceb> we launched it from 11Km
[14:31] <number10> it was pr - hHAB-Pink
[14:32] <number10> pre
[14:32] <Laurenceb> flew nicely, apart from the knot coming undone on the winch servo
[14:32] <nick_> How far did it fly?
[14:33] <Laurenceb> about 200m
[14:33] <eroomde> number10: this is a large payload http://www.eng.cam.ac.uk/news/stories/2011/CU_Spaceflight/Helicopter_montage.jpg
[14:33] <Laurenceb> further than a chute would have flown :P
[14:33] <Laurenceb> it was flying in a 200m radius circule
[14:34] <number10> that is indeed eroomde
[14:34] <Laurenceb> *james bond theme tune*
[14:35] <Laurenceb> the good news is it was in a stable arc all the way down
[14:36] <Laurenceb> so rogallos work
[14:36] <Laurenceb> if you know how to tie a knot
[14:36] <eroomde> you mean gravity didn't chnage to make it's rate of complete-plummet change unexpectedly
[14:37] <Laurenceb> huh
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[14:37] <Laurenceb> it had an average glide ratio of 3.85
[14:37] <Laurenceb> and i didnt trim it properly
[14:37] <eroomde> i'm teasing
[14:37] <Laurenceb> itd be 4.5 trimmed
[14:38] <Laurenceb> lots of people were saying it wouldnt be stable beyond 5Km altitude or so
[14:38] <Laurenceb> of course it remains to be seen what happens really high up
[14:39] <Laurenceb> you dont really want a good glide
[14:39] <Laurenceb> then it might get stuck in a thermal or head off to the north sea
[14:42] <eroomde> you can always nose down int hat case
[14:42] <Laurenceb> i think the worry is dutch roll
[14:43] <Laurenceb> but ive never seen that at ground level, even trying loads of weird configurations
[14:43] <Laurenceb> the trick is getting a wing with low porosity and then trimming it well
[14:43] <Laurenceb> it also helps to have a tight wing with an apex angle of 110 to 120 degrees
[14:44] <Laurenceb> if you make one following those guidelines and use polythene as the wing, then trim it so it only just pulls out of a dive i got a 5.7glide ratio
[14:45] <Laurenceb> highest ive heard described for rogallos is 5.5, so i was quite pleased
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[14:46] <Laurenceb> good glide makes testing easier, as you dont need such a steep hill
[14:48] <Laurenceb> too tight wing or too high apex angle makes it unstable, but mainly in pitch
[14:48] <Laurenceb> << rogallo guru
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[15:04] <SpeedEvil> Rogallos are specifically three supporting members, and an canopy in tension?
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[15:05] Action: SpeedEvil hits up wikipedia.
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[15:15] <Laurenceb> http://en.wikipedia.org/wiki/File:Rogallo_NASA.jpg
[15:15] <Laurenceb> thats totally flexible versions, but they dont work very well
[15:15] <Laurenceb> *there are
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[15:17] <Laurenceb> nice thing about rogallos is that theres only about 4 parameters to optimise
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[15:17] <Laurenceb> axes angle, fabric tension and CofG position
[15:17] <Laurenceb> *apex
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[15:18] <Laurenceb> if i was sufficiently insane id make a ton of models at different places in parameter space and characterise
[15:19] <eroomde> wouldn't it be nice if you had infinite R&D budgets
[15:20] <SpeedEvil> And minions.
[15:20] <SpeedEvil> Don't forget the minions.
[15:20] <eroomde> yes
[15:20] <eroomde> 'machine this for me, minion'
[15:20] <eroomde> and a whole cave of pcb fabbers
[15:21] <MrScienceMan> fabcave
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[15:51] <Lunar_Lander> hello
[15:52] <eroomde> i wish to propose a new law
[15:52] <eroomde> the unit of pressure is pascals, and nothing else
[15:52] <eroomde> you will loose one family member per infraction of this in your datasheets
[15:53] <WillDuckworth> miss milli bar
[15:53] <cuddykid> oo, some thunder
[15:53] <fsphil> aww, none here
[15:53] <eroomde> looking at you honeywell with your inches of water (like they hired their technical writers from the old testament)
[15:56] <fsphil> all the lightning seems to be over Grimsby
[15:56] <nigelvh> I likes my millibars.
[15:57] cuddykid_ (~acudworth@host-78-145-192-92.as13285.net) joined #highaltitude.
[15:57] <cuddykid_> and there went the power - typical!
[15:57] <nigelvh> YAY
[15:57] <fsphil> hah
[15:58] nosebleedkt (~nosebleed@ppp046177041220.dsl.hol.gr) joined #highaltitude.
[15:58] <fsphil> we've not had a good thunderstorm here in ages
[15:58] <fsphil> well overdue
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[15:58] Nick change: cuddykid_ -> cuddykid
[15:58] <cuddykid> don't think this is going to last - seems to be a temp small one
[15:58] <Lunar_Lander> hey cuddykid nosebleedkt
[15:59] <cuddykid> hi Lunar_Lander
[16:00] <nosebleedkt> yo luna
[16:01] <Lunar_Lander> brb dinner
[16:01] <Lunar_Lander> nosebleedkt, you got the geiger video?
[16:02] <fsphil> some new lightning activity near Birmingham
[16:03] <nosebleedkt> Lunar_Lander: yes and no. Sometimes it appears in the project page, sometimes it does not. very strange.
[16:03] <nosebleedkt> Lunar_LanderL: Now I will test my camera again
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[16:03] <nosebleedkt> one more time
[16:04] <nosebleedkt> but im sure fsphil wants some pictures of my tank.
[16:04] <nosebleedkt> So I head for the pics first
[16:21] <nosebleedkt> Well, people I need your help. I'm looking for a regulator valve for my tank. Those are two pictures of it. http://imagebin.org/216519, http://imagebin.org/216520
[16:21] <Lunar_Lander> nosebleedkt, ohh
[16:21] <Lunar_Lander> that sounds strange!
[16:21] <nosebleedkt> If someone knows what kind of regulator is this, please help cause Im flying next month and still don't know a thing about filling !
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[16:27] Action: nick_ hopes for free stuff from mbed
[16:30] <Lunar_Lander> nosebleedkt, sorry I have no idea about that either yet
[16:30] <Lunar_Lander> :(
[16:30] <nick_> http://mbed.org/blog/entry/Free-Stuff---Seeedstudio-Modules/ probably too late already, but maybe worth a shot.
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[17:08] <fsphil> free things?
[17:08] <fsphil> oh, involves work :)
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[17:13] <fsphil> doesn't look like the one I had nosebleedkt, thinking it might be air products
[17:14] <fsphil> or something else entirely
[17:14] Dan-K2VOL (~Dan-K2VOL@static-108-53-19-16.nwrknj.fios.verizon.net) joined #highaltitude.
[17:17] <Lunar_Lander> hello fsphil daveake Dan-K2VOL
[17:17] <Lunar_Lander> can someone help nosebleedkt with his regulator?
[17:18] <fsphil> hullo Lunar_Lander
[17:18] <daveake> wossup?
[17:19] <daveake> <-- only just joined
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[17:19] <fsphil> trying to identify what kind of regulator is needed for this: http://imagebin.org/index.php?mode=image&id=216519
[17:19] <fsphil> nice M0NSA, IPv666 address :)
[17:20] <daveake> nothing provided then?
[17:20] <daveake> This is helium?
[17:20] <fsphil> yea, He
[17:20] <fsphil> SAPIO is the brand, http://imagebin.org/index.php?mode=image&id=216520
[17:20] <fsphil> which I *think* is air products
[17:20] <daveake> Not balloon gas then, I guess, because then it's built in
[17:20] <fsphil> but I've never seen one of their cylinders before
[17:21] <fsphil> there is a tap on this, similar to the BOC ones
[17:21] <daveake> Well, all the He cylinders I've had you just screw in the supplied valve/filler
[17:21] <daveake> job jobbed
[17:21] <fsphil> I had to buy my filler
[17:21] <daveake> ok, usually they're rented out as part of the deal
[17:21] <fsphil> aaah
[17:22] <fsphil> I've got a spare if anyone needs a BOC filler
[17:22] <daveake> hmmm... might be handy
[17:22] <daveake> which type?
[17:22] <daveake> i.e. the solid plastic type you push back, or the flexi one?
[17:23] <fsphil> http://ecx.images-amazon.com/images/I/31lECWVaEKL._SL500_AA300_.jpg
[17:23] <fsphil> that one
[17:23] <fsphil> I've got another that has a solid filler too
[17:23] <fsphil> the ebay auction was for two
[17:24] <fsphil> but I only need the one
[17:24] <daveake> Not used that type; I shall have a think
[17:26] <fsphil> you have to push it to open it, but we usually just hang a small weight off it
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[17:28] <Lunar_Lander> nosebleedkt, still there?
[17:28] Dan-K2VOL (~Dan-K2VOL@static-108-53-19-16.nwrknj.fios.verizon.net) joined #highaltitude.
[17:28] <daveake> Re that cylinder above, looks to me like that needs a regulator added
[17:29] <daveake> The normal "balloonium" AP ones have it built in
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[17:31] <Lunar_Lander> hm
[17:31] <Lunar_Lander> yea
[17:32] <daveake> fsphil Is that valve a regulator too?
[17:32] <Lunar_Lander> btw daveake I think the EURUS code is awesome!
[17:32] <Lunar_Lander> xD
[17:33] <daveake> eurus code?
[17:33] <Lunar_Lander> yea the code is awesome because I think it is simple, still has some safety features which are good to have
[17:33] <daveake> nothing to do with me
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[17:37] <dayz> hey guys
[17:38] <Lunar_Lander> yea
[17:38] <Lunar_Lander> nosebleedkt, did you read what was said about the regulator?
[17:38] <Dan-K2VOL> hey
[17:38] <Lunar_Lander> hi Dan-K2VOL
[17:38] <Dan-K2VOL> hi kevin
[17:39] <Lunar_Lander> how are you?
[17:40] <dayz> anyone know of any good test exams for the ametuer licence in the USA
[17:40] <dayz> ?
[17:40] <Dan-K2VOL> I would ask that in #hamradio
[17:40] <Dan-K2VOL> I don't
[17:40] <fsphil> daveake: yea
[17:41] <fsphil> it doesn't let the gas out that fast-- so not ideal for filling in a hurry
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[17:42] <Lunar_Lander> how are you Dan-K2VOL ?
[17:42] <Dan-K2VOL> doing well Kevin, you?
[17:42] <daveake> fsphil H2 is great for fill speed :D
[17:42] <Dan-K2VOL> eh daveake?
[17:43] <daveake> H2 regulator has a good flow rate
[17:43] <Lunar_Lander> Dan-K2VOL, yeah quite OK, hope to be able to try the GPS code on the GPS on monday
[17:43] <Dan-K2VOL> nice
[17:44] <Dan-K2VOL> cool daveake, yeah I've had slow He regulators and fast ones, they're out there
[17:44] <fsphil> both mine are slow
[17:45] <Dan-K2VOL> most I've had are slow
[17:45] <fsphil> but the one I borrowed for the first launch was fast
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[17:46] <Lunar_Lander> Dan-K2VOL, yeah if jcoxon comes here I have to thank him
[17:46] <Lunar_Lander> I really like what he programmed
[17:46] <Lunar_Lander> because he included safety routines and stuff
[17:47] <Dan-K2VOL> oh neat, for what?
[17:47] <Lunar_Lander> for the Ublox GPS
[17:47] <Lunar_Lander> one routine like asks for navmode
[17:47] <Lunar_Lander> and if it is not in airborne mode, it sends that command again
[17:47] <daveake> sensible stuff
[17:47] <Lunar_Lander> and another routine looks for impossible times, like 25 hours or so
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[17:48] <Lunar_Lander> that gives a certain error code
[17:48] <Lunar_Lander> and causes that string to be rejected
[17:49] <Dan-K2VOL> nice
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[17:49] <Lunar_Lander> yeah I like that one
[17:49] <Lunar_Lander> and I think I got my head around that too!
[17:49] Nick change: number10_ -> number10
[17:54] <daveake> Question - assuming it can be done, what magic spell do I need to cast to have a funcube dongle auto-tune to track the payload frequency?
[17:54] <daveake> I currently use HD-SDR, in case that makes a difference
[17:59] <fsphil> depending on your hamlib version, dl-fldigi can control the dongle
[18:00] <daveake> What's hamlib then?
[18:00] <fsphil> it displays the wrong frequency, but it can adjust the correct amount
[18:00] <daveake> ok
[18:00] <fsphil> it's the library for controlling radios
[18:00] <daveake> OK. This is Windows btw
[18:00] <fsphil> it might be there
[18:00] <fsphil> in rig control, look for "amsat uk funcube dongle"
[18:00] <fsphil> or something similar
[18:01] <daveake> If it's easier I now have the cat lead for the ft817, so I can set that up for autotune instead
[18:01] <daveake> ok ta
[18:01] <fsphil> if the dongle isn't listed in the radio list, then the 817 would be esaier
[18:01] <daveake> ta
[18:01] <fsphil> ideally dl-fldigi could interface with hdsdr directly
[18:02] <daveake> would be nice
[18:02] <daveake> btw I ordered a couple of these DVB dongles
[18:02] <fsphil> nice, they are pretty amazing for the price
[18:02] <daveake> Yep
[18:02] <fsphil> I was tuning around with them last night
[18:03] <daveake> Got the same one Upu's got plus another one (same chips) for £9
[18:03] <fsphil> you can see the DVB-T signals (well not all of them)
[18:04] <fsphil> if eurus gets anywhere near me I'll give it a go
[18:05] <daveake> Do we have any idea where it's going? Guess it depends a lot on the altitude it floats at
[18:06] <fsphil> very much. higher altitude floats go more westerly
[18:06] <fsphil> 23 or 24km goes towards iceland
[18:06] <fsphil> 25km and up heads my way
[18:06] <daveake> that's sensitive
[18:06] <fsphil> surprisingly so
[18:07] <fsphil> I suspect with natural varation in altitude, it'll be somewhere in between
[18:07] <daveake> We had several different directions last weekend depending on altitude
[18:07] <fsphil> it's very mixed up winds at the moment
[18:08] <fsphil> anyone know of a simple notch filter I could make on stripboard?
[18:09] <SpeedEvil> Stripboard is inherently notch filters.
[18:09] <fsphil> hah
[18:09] <SpeedEvil> You cut a track, and it attenuates the signal.
[18:09] <fsphil> I need to filter a particular filter
[18:09] <fsphil> frequency*
[18:09] <SpeedEvil> At 70cm?
[18:09] <fsphil> filtering filters is just madness
[18:10] <nosebleedkt> The sky over my balcony right now: http://imagebin.org/216530
[18:10] <nosebleedkt> Yo SpeedEvil!
[18:10] <fsphil> yea I want to filter out the local TETRA signal
[18:10] <fsphil> you, with your sun
[18:11] <nosebleedkt> lol
[18:11] <SpeedEvil> That's annoying- as stripboard varies in capacitance
[18:11] <fsphil> so I could use the track itself as a small capacitor?
[18:11] <SpeedEvil> http://www.ifwtech.co.uk/g3sek/swxfiltr/swxfiltr.htm i wonder
[18:11] <nosebleedkt> dear sun go to ireland :)
[18:11] <fsphil> nosebleedkt: but not for too long as we burn quickly :)
[18:12] <nosebleedkt> until you get some tan and show off your friends
[18:15] <fsphil> me and the sun don't mix
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[18:17] <smrtz> Hey, is UpuWork here, or AFK?
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[18:19] <jonsowman> joey is running
[18:19] <jonsowman> :)
[18:19] <fsphil> nice. how'd you get it fixed?
[18:19] <jonsowman> heh, i made a stupid
[18:19] <smrtz> jonsowman: What?
[18:20] <jonsowman> fsphil: accidentally sent euroquartz the order code for the oscillator rather than the xtal
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[18:20] <jonsowman> thanks a lot zeusbot
[18:20] <fsphil> <zeusbot> no problem jon!
[18:20] <jonsowman> smrtz: http://www.cusf.co.uk/2012/03/joey-m-hardware-complete/
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[18:21] <smrtz> hmm, you designed the PCB?
[18:22] <Matt_soton> jonsowman: so you have the wrong crystals?
[18:22] <jonsowman> smrtz: yes
[18:22] <jonsowman> Matt_soton: i have oscillators rather than xtals
[18:22] <jonsowman> they look exatly the same
[18:22] <Matt_soton> oh
[18:22] <jonsowman> i just read the wrong order code from the table
[18:22] <smrtz> ok, then maybe you can help me
[18:22] <Matt_soton> lol woops
[18:22] <Matt_soton> not that cusf is short of money
[18:22] <jonsowman> no indeed
[18:22] <jonsowman> but still
[18:22] <jonsowman> annoying
[18:23] <jonsowman> 5 week lead time
[18:23] <Matt_soton> heh
[18:23] <smrtz> my max 6 shorts between ground and vcc, when I use an ohm metter it says 1.something
[18:23] <jonsowman> still i've got this one running on the original 13.56M xtals
[18:23] <Matt_soton> <3 factional n pll
[18:23] <Matt_soton> even if the max7057 puts out a load of crap
[18:23] <jonsowman> smrtz: yes that's bad
[18:23] <smrtz> but the measurement is way off because it also says a 4.4k resistor is 3.x
[18:24] <smrtz> but this is without any soldering, so I think it's a fault in the breakout board
[18:24] <jonsowman> better get a meter that you trust rather than risk frying your GPS
[18:24] <Matt_soton> smrtz: if you put hte ohmmeter one way on power it may have low resistance due to currents through the clamping diodes on inputs
[18:24] <smrtz> Matt_soton: thats what I was thinking, I don't want to say that it's bad.
[18:25] <smrtz> but anyway, jonsowman, there is no conductivity between gnd an vcc at all, right/
[18:25] <jonsowman> not apart from clamping diodes
[18:26] <Matt_soton> mind you they dont exist across power rails? ;/
[18:27] <jonsowman> no i was thinking that
[18:27] <Matt_soton> hmm somthing under my left shift key
[18:27] <jonsowman> biscuit?
[18:27] <smrtz> ok, cool, I just wanted some confermation. is there a data sheet for the max 6 modual itself, o I could scrap the breakout board if I need?
[18:27] <jonsowman> there's a datasheet (or four) on the ublox website
[18:28] <smrtz> great, thanks
[18:28] <Upu> hey smrtz
[18:28] <smrtz> hola!
[18:29] <Upu> having trouble with the breakout ?
[18:29] <Lunar_Lander> UPU IS HERE!
[18:29] <Lunar_Lander> YAY
[18:29] <Upu> for 2 mins
[18:29] <Upu> got to go out shortly
[18:29] <Upu> meh
[18:29] <smrtz> yeah, I guess I might have left the soldering iron on it to long or something
[18:30] <Lunar_Lander> Upu, OHHH why?
[18:30] <Upu> they are fairly tolerant
[18:30] <Upu> just soldering wires onto it ?
[18:30] <Matt_soton> they are modules and so have solder of their own on the inside
[18:30] <smrtz> which is weird, because I'm normally not, absolutly horrible at soldering...
[18:31] <smrtz> yeah, and just to the 4 pins, vcc, gnd, tx, and rx
[18:31] <Upu> if your about later on I'll go through checking it with you
[18:31] <Upu> if it still doesn't work post it back and I'll check it
[18:31] <jonsowman> and joey has a lock :)
[18:31] <Upu> going to a neighbours for a few drinks Lunar_Lander
[18:31] <Lunar_Lander> cool!
[18:31] <Lunar_Lander> ah
[18:31] <smrtz> I'll still be at work.
[18:31] <Upu> thats a good thing jonsowman :)
[18:31] <smrtz> but yeah, that would be awesome!
[18:32] <jonsowman> Upu: hehe yes
[18:32] <jonsowman> 433.97 MHz is the best I can manage at the moment
[18:32] <jonsowman> sorry 433.997
[18:32] <Upu> very noisy down there
[18:32] <jonsowman> yeah
[18:32] <Matt_soton> whats the minimuim frequency you can put out 10mW on?
[18:33] <jonsowman> above that...
[18:33] <jonsowman> 434.004 ish?
[18:33] <smrtz> if we can't get it working. we tried just hookin it up to a normal uno's tx and rx, and my minis vcc and gnd, and just using software serial, but all we got was "FAILED"4
[18:33] <jonsowman> *.040
[18:33] <Matt_soton> close enough lol
[18:33] <jonsowman> Matt_soton: haha
[18:33] <fsphil> so close
[18:33] <jonsowman> eventually i'll get there...
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[18:33] <jonsowman> the right xtals will get me 434.56
[18:34] <fsphil> you gonna fly it anyway jonsowman?
[18:34] <Upu> ok talk to you later on smrtz gtg now
[18:34] <jonsowman> fsphil: yes
[18:34] <Matt_soton> smrtz: power it up, and but a multimeter on its output, anything othe rthen 0 or 3.3 will suggest data
[18:34] <jonsowman> we need it for upcoming flights
[18:34] <smrtz> well, the uno's pin 5 and 4. Alright, thanks man, have fun!
[18:34] <fsphil> aah
[18:34] <Matt_soton> surely cusf have other trackers?
[18:34] <jonsowman> we do, but joey and wombat are intended to fly togeter
[18:35] <Matt_soton> did adam sort out the adf?
[18:35] <jonsowman> i think so
[18:35] <jonsowman> it appears to be working
[18:35] <Matt_soton> what changed?
[18:35] <smrtz> Matt_soton: yeah, and it was switching, but the serial moniter was just saying failed
[18:35] <jonsowman> i was using it to test the rtl the toher day
[18:35] <jonsowman> Matt_soton: can't remember
[18:35] <jonsowman> ask him
[18:35] <smrtz> jonsowman: I just bought one online, let me know how it goes!
[18:36] <jonsowman> smrtz: they're great, total bargain
[18:36] <jonsowman> i was using it to track a payload the other day
[18:36] <jonsowman> worked fine
[18:36] <Matt_soton> smrtz: if it was changing then itll be an ardino thing not the gps
[18:36] <jonsowman> only a few dB down on my FT817
[18:36] <smrtz> yeah, it was either that, or a &300USD reciver.
[18:36] <Matt_soton> also test with a ftdi dongle
[18:36] <Matt_soton> brb
[18:37] <smrtz> Matt_soton: what would you recomend I do?
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[18:41] <Matt_soton> do you have a ftdi dongle?
[18:41] <Matt_soton> or scope?
[18:42] <smrtz> nope its in the mail
[18:42] <Matt_soton> jonsowman: despite the printer doing colour solidworks cant export the colour in a format the printer likes :(
[18:42] <Matt_soton> smrtz: sure you have the tx/rx lines the right way round?
[18:42] <jonsowman> Matt_soton: lol
[18:42] <jonsowman> CAD = fun
[18:43] <Matt_soton> any free programs you know of which may work?
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[18:43] <smrtz> Matt_soton: yes, we tried it both ways
[18:43] <jonsowman> no idea
[18:44] <Matt_soton> if hte multimeter is suggesting there is data the gps will probably not be damaged
[18:45] <smrtz> yeah, it's my only DMM. but I might be able to borrow one
[18:48] <smrtz> Well, I have to get back to work, thanks for the help, I'll keep the channel open so I can read
[18:49] <jonsowman> 13dB SNR
[18:49] <jonsowman> wooo
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[18:54] <jonsowman> well joey appears to be fine
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[18:54] <jonsowman> so i'm back where i was about 3 months ago
[18:54] <jonsowman> never mind
[18:54] <fsphil> sorta progress
[18:55] <jonsowman> https://www.dropbox.com/s/kj19to5pqmhhby7/2012-06-15%2016.48.11.jpg
[18:55] <jonsowman> payload we were building today
[18:55] <jonsowman> gopro has eyelashes
[18:55] <jonsowman> :D
[18:56] <Matt_soton> jonsowman: is this for 'that thing'?
[18:56] <navrac> Hi All, I'm back after a rather long work enforced absence - much happening - apart from the winding up of oliver on the mailing list?
[18:56] <jonsowman> Matt_soton: yes
[18:56] <fsphil> the eye of sauron
[18:56] <jonsowman> fsphil: there are 4 gopros :D
[18:56] <fsphil> it's a spider!
[18:56] <jonsowman> haha
[18:56] <jonsowman> that's the metcal iron in the background btw fsphil
[18:56] <fsphil> I was just admiring that
[18:56] <Matt_soton> all pointing at the same tihng or out, up, down, thing?
[18:57] <jonsowman> Matt_soton: up, two sideways, one angled 45 deg down
[18:57] <fsphil> navrac: that was a high point :)
[18:58] <navrac> lol - cheered me up no end!
[18:58] <fsphil> there was much wooshing that day
[18:58] <Matt_soton> also best soldering iron ever: http://www.jbctools.com/cd-s-precision-compact-station-product-506.html
[18:58] <Matt_soton> and the tweezer one
[18:58] <fsphil> tweezer soldering tips always seemed like a good idea to me
[18:59] <navrac> was hoping to finish my superpressure balloon this weekend - then my pc decided to melt a processor so i'm going to be spending the weekend trying to move programs across
[18:59] <Matt_soton> labs have a tweezer+standard set but i cant find it on their website
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[18:59] <jonsowman> Matt_soton: http://uk.farnell.com/oki-metcal/sp200-21/soldering-system/dp/4950379
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[19:00] <jonsowman> it's /so/ good
[19:00] <Matt_soton> has the advantage of not being nearly as much as hthe jbc one
[19:01] <jonsowman> the jbc is £20 more
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[19:01] <Matt_soton> eve nfrom farnell?
[19:01] <jonsowman> i'm just going by the prices on the jbc website
[19:01] <fsphil-laptop> I do like weechat but not being able to open long urls is just annoying
[19:02] <Matt_soton> http://www.jbctools.com/al-automatic-solder-feed-station-product-91.html heh
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[19:02] <jonsowman> that's crazy
[19:02] <fsphil-laptop> that's Commander Data's soldering station
[19:02] <navrac> out of my price range
[19:02] <Matt_soton> thers a nitrogen fed tip one on their site too
[19:03] <Matt_soton> if i were to spend some money to get a decent iron it would be one of the jbc ones
[19:04] <smrtz> I like Weller, for the price
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[19:09] <navrac> just got round to opening my packages from the last few weeks and realised I ordered AA lithiums instead of AAA's. What a waste
[19:09] <smrtz> navrac: I got AA, they work fine
[19:10] <navrac> I can't afford the weight on the payload
[19:11] <smrtz> ahh.
[19:11] <fsphil-laptop> if you're in a hurry you can prolly get them at tesco
[19:12] <smrtz> do you guys have wallmart overthere? that's where I got mine, and they had AAA
[19:12] <M0NSA> fsphil - ta
[19:13] <Matt_soton> did upu say how long his payload lasted on a single AAA in the end?
[19:13] <jonsowman> 4.5 hours ish iirc
[19:13] <smrtz> ... wut?
[19:13] <Matt_soton> at room temperature?
[19:13] <jonsowman> think so
[19:14] <Matt_soton> so like 3hrs in the cold?
[19:14] <smrtz> does anyone have a link handy?
[19:14] <Matt_soton> also this was no power saving and a 3.3V payload
[19:14] <jonsowman> capacity shouldn't fall off quite that badly
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[19:14] <Matt_soton> hopefully i should get alot more then he did
[19:14] <Lunar_Lander> hi jonsowman btw
[19:14] <smrtz> Matt_soton: don't AAA commenly push about 1.5?
[19:15] <jonsowman> hi
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[19:15] <jonsowman> smrtz: boost reg
[19:15] <Matt_soton> yea but switch mode supply
[19:16] <smrtz> ahh, thanks
[19:16] <smrtz> the max 6 takes like, 75mah to startup, that's impressive for one AAA, right?
[19:17] <Matt_soton> its not too much
[19:18] <Matt_soton> but its more like 150mA at the battery
[19:18] <Matt_soton> even so still fine
[19:18] <smrtz> oh, I guess I have it backwards, thank
[19:18] <smrtz> thanks*
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[19:22] <fsphil-laptop> the little boost regulators are amazing
[19:23] <smrtz> I guess so
[19:26] <fsphil-laptop> we're not far off being able to use solar power
[19:27] <smrtz> is the weight an issue/
[19:28] <fsphil-laptop> depends on the kind of flight
[19:29] <smrtz> oh, cool.
[19:29] <fsphil-laptop> the little pico flights can't carry too many batteries, solar might be a better option
[19:30] <smrtz> but on a distance flight, the batterys would be lighter than unlimited solar? I would think it would be the other way around.
[19:30] <fsphil-laptop> a pico flight could last days if done well
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[19:31] <smrtz> shigh, I should really go study more.
[19:31] <fsphil-laptop> solar cells are fairly light
[19:31] <smrtz> and learn how to type/spell
[19:31] <fsphil-laptop> speeling is overrated
[19:31] <SpeedEvil> Also - there is the option of using bare solar cells - which are both quite cheap and light.
[19:32] <smrtz> heh, cool. Thanks.
[19:32] <SpeedEvil> 0.6V per, which is annoyin
[19:32] <SpeedEvil> g
[19:32] <fsphil-laptop> this boost reg would probably not work that low
[19:32] <fsphil-laptop> would need them in pairs probably
[19:32] <smrtz> Oh, SpeedEvil I ended up going with an RTL-SDR dongle. some of the people over at #hamradio talked me into it
[19:32] <SpeedEvil> For what?
[19:33] <SpeedEvil> Oh
[19:33] <smrtz> thanks again for the help last night.
[19:33] <smrtz> well, two days ago
[19:33] <SpeedEvil> There are concerns about local signals jamming.
[19:33] <SpeedEvil> But...
[19:34] <smrtz> I know, but for $20, it was our best option. We're thinking of getting a second, and having two chase cars... what do you thing about that/
[19:35] <fsphil-laptop> that's always a good idea
[19:35] <SpeedEvil> http://www.ebay.co.uk/itm/36-A-grade-3x6-solar-cell-kit-for-DIY-solar-panel-/290722323373?pt=UK_Gadgets&hash=item43b0669bad - these are about 2 grams each, and 2 watts.
[19:36] <SpeedEvil> Perhaps half a watt - counting random spinning in sunlight
[19:37] <smrtz> and flexable? they could go over the balloon, and if strong enough, maybe act as the parachute on the way down?
[19:37] <fsphil-laptop> half a watt is more than enough
[19:37] <SpeedEvil> smrtz: No - very unflexible
[19:37] <SpeedEvil> smrtz: Think more like a sheet of very, very fragile glass
[19:37] <SpeedEvil> I'd consider them disposable per flight
[19:37] <fsphil-laptop> yea they'll be destroyed on landing
[19:37] <smrtz> oh, bad work laptop with crappy moniter looked wavey
[19:38] <SpeedEvil> But 0.6V -> battery boost is trivial with an external FET, if you have a battery
[19:38] <smrtz> so it's all or nothing.
[19:38] <SpeedEvil> If you have an external supply, I mean
[19:39] <SpeedEvil> There are more expensive and heavier - though more convenient flexible solar cells too
[19:40] <smrtz> are they light enought that the weight gained by them would be lost again from the lack of batteries and *possibly* parachute?
[19:40] <SpeedEvil> you're not going to be replacing the parachute by any solar cell
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[19:41] <smrtz> Ok, kind of an interesting idea though, right? Or maybe a, <i>solar</i> sail?
[19:41] <SpeedEvil> For a pico, you don't really need a chute - a bubble-wrap bag will be fine
[19:42] <smrtz> hmm, I thought that would work, does <b>Bold?</b>
[19:42] <smrtz> guess not
[19:42] <smrtz> SpeedEvil: oh, thats really cool
[19:44] <smrtz> hmm, I'll have to serch it when I get home, looks like they started filtering port 80
[19:45] <Lunar_Lander> btw did anyone noticed that UEFA was cancelled 4 minutes after the beginning of the match due to thunderstorm?
[19:49] <smrtz> uhh, no
[19:50] <daveake> postponed
[19:51] <Lunar_Lander> yea
[19:52] <smrtz> was it because the balloon wouldn't go above the storm, or tracking would just be really hard thew the storm
[19:52] <Lunar_Lander> balloon?
[19:53] <smrtz> err, is UEFA not a balloon?
[19:53] <Lunar_Lander> UEFA is like european football championship
[19:53] <smrtz> well then
[19:53] <smrtz> wait fooball with an oval, or football with a white checkered sphere?
[19:53] <Lunar_Lander> the latter thing
[19:54] <Lunar_Lander> soccer in the USA
[19:54] <smrtz> ahh, cool
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[19:55] <fsphil-laptop> thunder is much more interesting anyway
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[19:57] <smrtz> heh, when I was a kid, my family went white water rafting down the Grand Canyon, but it stormed, so at first it just made it more fun, but the lightning (thunder) was so bad, it was striking the ground within the canyon, so we hid under an overhanging rock untill we could get airlifted out.
[19:57] <smrtz> Good memories.
[19:58] <Laurenceb_> your parents sound mental
[19:58] <fsphil-laptop> yea it can get pretty dangerous
[19:58] <fsphil-laptop> we never get storms like that
[19:58] <zamabe> nah, his parents sound awesome
[19:59] <smrtz> we didn't know it was going to storm that bad, and we wernt like, in pool flotes, it was a profetionaly guided trip.
[20:02] <smrtz> the boats were something like this, http://dibboats.com/images/snout23.jpg but bigger, and didn't have railings
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[20:03] <smrtz> Sorry, I seem to be struck by nastalga, it's gone now though.
[20:05] <Laurenceb_> is there some sort of ball kicking thing going on somewhere?
[20:05] <Laurenceb_> think i heard a rumour...
[20:05] <fsphil-laptop> apparently it's been cancelled, normality briefly restored
[20:07] <staylo> Sheltering under an overhang is generally a bad idea IIRC, though maybe it's not such an issue in a canyon :)
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[20:20] <Lunar_Lander> hi jcoxon
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[20:32] <Laurenceb_> http://linuxcommand.org/learning_the_shell.php
[20:33] <Laurenceb_> seems quite useful
[20:34] <MrScienceMan> linux is quite useful
[20:34] <jonsowman> yeah that is an excellent website
[20:34] <smrtz> I've been useing it exclusivly for years.
[20:35] <jonsowman> yeah I use linux as my main OS
[20:35] <jonsowman> my laptop is OS X though
[20:35] <smrtz> nice, I wont judge you for being a hipster... jk
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[20:36] <jonsowman> lol
[20:36] <jonsowman> i mainly bought it for the hardware
[20:36] <jonsowman> but i've got nothing against OS X really
[20:36] <jonsowman> i keep threatening to install ubuntu but have never got round to it
[20:37] <smrtz> yeah, it's a perfictly fine laptop, just a lot of hipsters happen to get them
[20:37] <jonsowman> hehe
[20:37] <fsphil-laptop> how long to the batteries in a met sonde usually transmit for?
[20:37] <jonsowman> fsphil-laptop: wet or dry cells?
[20:37] <fsphil-laptop> last for
[20:37] <fsphil-laptop> unknown
[20:37] <fsphil-laptop> tonights is landing not massively far away according to the predictor
[20:37] <fsphil-laptop> http://habhub.org/predict/#!/uuid=ff90bd956972b31714db95d5f356b1878441812e
[20:38] <fsphil-laptop> but I won't get there until tomorrow
[20:38] <smrtz> it's easy, depending on your hardware, should take less than an hour
[20:38] <jonsowman> fsphil-laptop: it's hard to say really
[20:38] <jonsowman> i can put you in touch with someone who can give you an answer though if you like
[20:38] <fsphil-laptop> sure
[20:39] <jonsowman> guy at my local radio club at home who has chased and recovered probably hundreds
[20:39] <fsphil-laptop> I like that the flight path is drawing a dolphin again
[20:39] <smrtz> haha, me too
[20:41] <fsphil-laptop> I'll see how low I can track it, if I can get it down to a few hundred metres I might take a look
[20:42] <Lunar_Lander> btw I got a new team member and the brother of his girlfriend is a radio ham
[20:42] <Lunar_Lander> that could be the second ham on my team
[20:43] <r2x0t> fsphil: if it's water activated, probably 2-3 more hours
[20:44] <r2x0t> if dry version, 5-6 more hours
[20:44] <Lunar_Lander> hi r2x0t
[20:44] <r2x0t> if it lands on open field, it's easy to find even without signal
[20:44] <smrtz> hey man!
[20:44] <r2x0t> hi
[20:44] <fsphil-laptop> no chance of it still transmitting then, but yea it should be open land
[20:45] <fsphil-laptop> there's a few forests around there from the looks of google maps
[20:45] <r2x0t> if you get it to ~500m above ground, it's very good chance if you go to the last coords, you will see it
[20:45] <fsphil-laptop> although it's a very blurry image
[20:45] <fsphil-laptop> yea that's my thinking
[20:45] <smrtz> fsphil-laptop: at one point, I wanted to have a loud beeper go off after it hit the ground.
[20:46] <fsphil-laptop> smrtz, not a bad idea
[20:46] <fsphil-laptop> although it can freak people out if they don't know what it is :)
[20:46] <r2x0t> lol, they will call bomb squad on it
[20:47] <smrtz> have it activate only when the GPS isn't registering movemnt, so if it is just weird and sops mid air, it goes off, but then stops again as it falls.
[20:47] <smrtz> Oh, hmm
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[20:47] <smrtz> new plan, speaker, "Do not be alarmed, I am not a bomb."
[20:47] <fsphil-laptop> "Honest"
[20:48] <smrtz> hah
[20:48] <fsphil-laptop> "I am a talking bomb"
[20:48] <r2x0t> "Run with me and I will stop beeping. Really!"
[20:48] <Lunar_Lander> xD
[20:49] <r2x0t> + "No boom included"
[20:49] <smrtz> I will add this to mine.
[20:49] <smrtz> everyone record them saying these things, and email it to me.
[20:50] <smrtz> d1244414@rtrtr.com
[20:50] <smrtz> it's a 10 minute mail address, I'll forward them from there to my real oen.
[20:51] Action: fsphil-laptop shall be spending the next 10 minutes eating cornflakes
[20:52] <Lunar_Lander> XD
[20:53] <Lunar_Lander> DAMN!
[20:53] <Lunar_Lander> almost forgot it
[20:53] <Lunar_Lander> anyone of CUSF here currently?
[20:54] <jonsowman> yes
[20:54] <Lunar_Lander> ah
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[20:56] <griffonbot> Received email: James Coxon "[UKHAS] Eurus 2 Launch Sunday 1000 BST"
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[21:22] <Lunar_Lander> COOL! http://www.ebay.de/itm/Back-To-The-Future-Flux-Capacitor-Replica-/330725948898?pt=LH_DefaultDomain_0&hash=item4d00cd7de2
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[21:29] <nick_> eroomde: remember we talked about measuring the speed of sound?
[21:34] <nick_> Well, I got a free ultrasound range finder from mbed :D
[21:34] <fsphil-laptop> result
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[21:40] <jdtanner> I've got a couple of ultrasonic transducers if anyone wants to have a play
[21:41] <Lunar_Lander> jdtanner, hello!
[21:42] <jdtanner> evening
[21:43] <Lunar_Lander> how are you?
[21:43] <jdtanner> Not too bad thanks.
[21:44] <jdtanner> http://www.mouser.com/catalog/specsheets/KT-400244.pdf I've got three receivers in my parts box
[21:44] <Lunar_Lander> cool
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[21:49] <nick_> eroomde: I got a free ultrasound range finder from mbed.
[21:49] <nick_> Maybe we can try to measure the speed of sound at altitude?
[21:52] <nick_> Guys, check out http://mbed.org/blog/entry/Free-Stuff---Seeedstudio-Modules/
[21:52] <nick_> I got an ultrasound range finder, and RTC, 3-axis accelerometer and temp/humidity sensor seem to be up for grabs.
[21:58] <jdtanner> They did somethig very similar on the Huygens lander that went to Titan
[22:00] <Lunar_Lander> yes=
[22:00] <Lunar_Lander> ?
[22:01] <fsphil-laptop> they had an audio microphone on there
[22:01] <fsphil-laptop> turns out the surface of titan is silent
[22:01] <jdtanner> haha
[22:02] <fsphil-laptop> shame it didn't land near or on a lake
[22:02] <Lunar_Lander> oh ye
[22:02] <Lunar_Lander> *yea
[22:02] <Lunar_Lander> we need a microphone on Mars
[22:03] <Lunar_Lander> didn't Phoenix have one?
[22:03] <fsphil-laptop> there was
[22:03] <fsphil-laptop> yea
[22:03] <fsphil-laptop> they didn't turn it on
[22:03] <fsphil-laptop> I think they where afraid of something breaking
[22:03] <jdtanner> http://adsabs.harvard.edu/abs/2007Icar..189..538H
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[22:03] <Lunar_Lander> ohhhh!
[22:04] <jdtanner> can't read it though as I've no longer got access to paid journals :(
[22:05] <fsphil-laptop> "owing to technical concerns on the spacecraft side of the interface, NASA decided not to operate the MARDI. Late in the Phoenix mission, an attempt was made to acquire sounds through the MARDI microphone, but no data were received and the mission ended shortly therafter."
[22:05] <Lunar_Lander> ohhhh!
[22:06] <jdtanner> (paid journals&bloody annoying...)
[22:07] <SpeedEvil> jdtanner: I hate that.
[22:07] <MrScienceMan> jdtanner: have you tried posting on r/scholar ?
[22:07] <jdtanner> on reddit?
[22:07] <MrScienceMan> y
[22:07] <SpeedEvil> jdtanner: I'm currently trying to chase up how muscle protein sythesis works in humans.
[22:07] <jdtanner> No&but I'll have a look.
[22:07] <SpeedEvil> jdtanner: exercise sites are hopeless.
[22:07] <MrScienceMan> if you have any article in sight
[22:08] <MrScienceMan> you can ask there and is likely that somebody will give a pdf or smth
[22:08] <MrScienceMan> there is also info on openacess journals in the side bar
[22:08] <jdtanner> It just seems daft that one has to do that in order to read publications that were paid for as part of a *public* science project
[22:08] <jdtanner> Of course most people use archiv nowadays
[22:09] <MrScienceMan> some universities have free access to such databases
[22:09] <jdtanner> There must be a better way
[22:09] <MrScienceMan> so you can simply proxy yourself through the uni
[22:09] <MrScienceMan> and find what you need :)
[22:10] <jdtanner> Yeah, all the Universites I've studied/worked at had access&but not for the public. It is a bit like Ordnance Survey data being public, yet costing a bloody fortune...pfft
[22:10] <Lunar_Lander> is it as daft as walking on the railway?
[22:10] <jdtanner> lol
[22:10] <jdtanner> anyway&time to get off my soapbox
[22:11] <Lunar_Lander> btw railway
[22:11] <fsphil-laptop> random
[22:11] <Lunar_Lander> I recall that in schools they used to show the dangers of the railway by showing like movies in which people died and so on while misbehaving
[22:11] <Lunar_Lander> is that true?
[22:13] <Lunar_Lander> cause the guy who put it on youtube said that he was shown that back when he was at school
[22:13] <Lunar_Lander> or so
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[22:14] <fsphil-laptop> http://www.youtube.com/watch?v=yUo1Ghx3QyI
[22:14] <Lunar_Lander> xD
[22:15] <Lunar_Lander> that one https://www.youtube.com/watch?v=slJyhOEo-SY
[22:16] <fsphil-laptop> ah, john sheppard worked for british transport before joining stargate
[22:21] <jdtanner> Anyone got a link for the predicted flight path of Eurus on Sunday?
[22:22] <Upu> evening
[22:22] <jdtanner> evening Upu :)
[22:23] <Upu> Matt_soton 4.5 hours with no power saving and continuous TX
[22:23] <Upu> hye jdtanner
[22:23] <Upu> got a NOTAM yet ?
[22:23] <Matt_soton> Upu: thanks
[22:23] <Upu> so 12 + on a AA
[22:23] <jdtanner> Doesn't sound like it no :( David is on the case though
[22:24] <Upu> I'm open to suggestions on power saving code
[22:24] <Matt_soton> dont transmit all the time
[22:24] <Matt_soton> also low power mode on GPS?
[22:24] <Lunar_Lander> was anyone of you old enough to have been shown that in school?
[22:24] <nick_> For your tracker?
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[22:24] <Upu> well the experiment was can a tracker run from a single 1.5V cell
[22:24] <Upu> answer yes
[22:24] <nick_> Does the AVR have a sleep mode?
[22:25] <Matt_soton> the msp430 has alot of power saving stuff
[22:25] <Matt_soton> avr i think has something, but only the -P one?
[22:25] <Upu> it proves the hardware works
[22:25] <Upu> everything else is software
[22:25] <nick_> I know the cortex m3 has some sleep until interrupt mode
[22:26] <Matt_soton> the ublox can sleep and get fix again in 1sec i seem to remember
[22:26] Action: nick_ has been doing some homework via a kindle free sample
[22:26] <Matt_soton> how much power does the avr actually use?
[22:26] <SpeedEvil> AVR has several sleep modes
[22:26] <SpeedEvil> several milliamps
[22:26] <Matt_soton> reasonably significant if the gps can go down to 11mA
[22:26] <Upu> well my board was pulling 266mA per hour from the batteries
[22:27] <Matt_soton> mA per hour? :P
[22:27] <Upu> via the boost
[22:27] <Upu> yes
[22:27] <Upu> from the batteries
[22:27] <Upu> boost ~ 80% efficient
[22:27] <Upu> and stepping up feel free to do the maths
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[22:28] <nick_> Your electrons are accelerating?
[22:28] <fsphil-laptop> 266mAh/hour
[22:28] <Upu> some electrons were displaced yes
[22:28] <Matt_soton> 90mA at 3.3V or so i think
[22:28] <Upu> which sounds about right
[22:28] <Upu> for no power saving
[22:28] <Matt_soton> ntx2?
[22:28] <Matt_soton> rfm?
[22:28] <Upu> RFM22B
[22:28] <Matt_soton> whats that like for power?
[22:29] <Matt_soton> average tx current
[22:29] <Upu> no idea
[22:29] <Upu> never measured it
[22:29] <Upu> it was set to 11dB
[22:29] <Upu> ~12.5mW
[22:29] <Upu> very ish
[22:32] <Matt_soton> apparently 30mA @ 13dBm
[22:33] <Matt_soton> the crystal would probably use a 1mA or two by itself
[22:33] <Upu> so 50mA for the GPS + 30mA + 10mA (?) for the AVR
[22:33] <Upu> in the ballpark
[22:34] <Upu> but basically I have the hardware launch a single cell tracker, tracker = 5g , cell = 7.6g
[22:34] <fsphil-laptop> more likely 5ma for the avr
[22:34] <Upu> = good for foil
[22:34] <Upu> I think I'd want some more run time under latex
[22:34] <Upu> I need to start playing with the code now
[22:36] <Matt_soton> the biggest weight on mine will probably be the case tbh
[22:36] <Upu> yeah
[22:36] <Upu> you going for 1.8v ?
[22:37] <Matt_soton> yep
[22:38] <Upu> be interested to see how that works out
[22:38] <Laurenceb_> looks like sparkfun have switches for eroomdes rocket
[22:38] <nick_> Did anyone get anything from sparkfun's free day?
[22:39] <fsphil-laptop> captcha phobia
[22:39] <Laurenceb_> lol
[22:39] <jonsowman> lol
[22:39] <Laurenceb_> rsi
[22:41] <nick_> I got my dates screwed up and missed it :(
[22:41] <fsphil-laptop> I got stuff on a previous free day. got a sparkfun pint glass
[22:42] <SpeedEvil> fsphil-laptop: lead free?
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[22:44] <fsphil-laptop> hope so :)
[22:45] <jcoxon> clearing the tracker
[22:45] <jcoxon> any complaints?
[22:46] <fsphil-laptop> none here, although I'm gonna be plotting a sonde shortly. I'll be clearing it afterwards though
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[23:13] <Matt_soton> anyone used code composer?
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[23:29] <Laurenceb_> whats the met-sonde?
[23:29] <fsphil-laptop> weather balloon launched near me
[23:29] <fsphil-laptop> tracking it through a series of hacky scripts :)
[23:29] <Laurenceb_> oh, its a vaisala one?
[23:29] <fsphil-laptop> yea
[23:30] <Laurenceb_> cool
[23:30] <Laurenceb_> zzz
[23:30] <fsphil-laptop> nite
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[23:36] <fsphil-laptop> travelling further north than predicted
[23:36] <fsphil-laptop> only about 15km from me
[23:37] <SpeedEvil> fsphil-laptop: something to put them on the tracker might be fun
[23:38] <fsphil-laptop> it is
[23:39] <fsphil-laptop> gps residual of 14.6km is bad I guess :)
[23:39] <SpeedEvil> ah :)
[23:39] <fsphil-laptop> I've it setup to only upload to spacenear if the residual is fairly low
[23:39] <fsphil-laptop> otherwise it's mad
[23:40] <fsphil-laptop> 18km
[23:40] <SpeedEvil> http://www.yr.no/place/United_Kingdom/Scotland/Glenrothes/hour_by_hour.html
[23:40] <SpeedEvil> I thought this was summer.
[23:41] <fsphil-laptop> that was just a rumour
[23:43] <jcoxon> i think this weekend will end the thoughts of a summer
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[23:58] <fsphil-laptop> it's going away from me now
[00:00] --- Sat Jun 16 2012