highaltitude.log.20110524

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[07:35] <SamSilver> Laurenceb: top of the morning to you sir
[07:39] <fsphil> strange phrase that
[07:41] <SamSilver> it is very British saying
[07:41] <SamSilver> translation = Howdy!
[07:56] <fsphil> Howdy indeed!
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[08:23] <Chingy> Hi all
[08:26] <SamSilver> hi
[08:38] <Elwell> s/British/Irish/ shurely?
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[09:07] <Chingy> Has anyone used the adafruit GPS logger shield here ?
[09:07] <Chingy> I recently ordered an arduino uno and a lassen iQ, and was wondering if the adafruit was worth it, since i'm kind of a beginner when it comes to electronics...
[09:09] <DanielRichman> imo it's more in the software than the hardware. Plug the output of the iQ to the input of hte arduino, make sure you don't blow either up, and that's about it
[09:09] <jonsowman> the em-406a on the adafruit shield has a 24km altitude limit
[09:11] <Chingy> well, from zhat i read you can use the shield zith the lassen
[09:11] <Chingy> what*
[09:11] <Chingy> which eliminates this problem
[09:11] <cuddykid> Chingy, have you ordered the lead (I believe it was from samtec) to make it easier to connect the lassen iq to arduino?
[09:11] <cuddykid> to avoid the otherwise horrendous soldering!
[09:12] <DanielRichman> yes. all you need is the cable and two resistors in order to connect the iQ to the arduino
[09:12] <DanielRichman> some people have even flown stuff on a breadboard; but stripboard is fine.
[09:12] <Chingy> cuddykid > yeah i did :)
[09:12] <cuddykid> good stuff :)
[09:13] <cuddykid> you'll be fine with the lassen, mine works a treat along with the arduino!
[09:13] <Chingy> nice to hear
[09:13] <cuddykid> make sure to put some foil under the gps antenna, otherwise the gps reception can be a little patchy
[09:13] <Chingy> so do you think the adafruit will help me and make my life easier or not really ?
[09:14] <Chingy> thanks for the tip
[09:14] <cuddykid> Not too sure, but wouldn't have thought it was necessary
[09:15] <Chingy> ok
[09:15] <Chingy> i guess i'' try zithout it
[09:15] <Chingy> i'll*
[09:15] <cuddykid> yeah
[09:15] <Chingy> and if i fail miserably, i'll buy then
[09:16] <Chingy> did you use anything special (libraries and stuff) to work with your lassen iq ?
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[09:19] <Lunar_Lander> hello
[09:19] <Chingy> Hi Lunar_Lander
[09:19] <Lunar_Lander> how is life today?
[09:19] <fsphil> yikes: http://habhub.org/predict/#!/uuid=8ac60a7cb12f4e688525183c5373a78c1813e5bb
[09:20] <fsphil> anyone near Glasgow fancy tracking a payload? :)
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[09:21] <Chingy> haha sorry fsphil, not quite my area !
[09:27] <fsphil> I'm very tempted lol
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[09:47] <cuddykid> Chingy, just the tinyGPS library iirc
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[09:51] <nelly11> Hi! Does anyone roughly know how much the ATmega328 microcontroller (or any other) weighs? I have looked in the 400 odd pages data sheet and there's no reference made to mass
[09:52] <jonsowman> depends on package, but like, a few grams?
[09:53] <nelly11> I am trying to build a mass budget for the compents I want to carry on the balloon, so I kinda need a more precise figure
[09:53] <nelly11> *components
[09:53] <jonsowman> do you really need to know that accurately?
[09:54] <nelly11> well kinda because there are mass constraints on my project so I need to know where I am
[09:55] <nelly11> would you say it weighs as much as the GPS reveiver you normally use?
[09:55] <jonsowman> no, not even close
[09:55] <jonsowman> the mass of the AVR is going to be lost in the noise floor from all the other stuff, like bits of solder, gaffa tape, electrical tape, etc
[09:57] <nelly11> ok cool...since the GPS is about 130g, could it be safe to assume that that is 20g?
[09:57] <jonsowman> that would be a safe estimate
[09:57] <nelly11> ok thanks
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[10:03] <Chingy> ok, thanks cuddykid !
[10:05] <Elwell> fsphil: kick Hibby to track it
[10:06] Action: fsphil kicks Hibby :p
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[10:11] <Elwell> harder!
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[10:13] <nelly11> might be a silly question but when Kaymont quote balloon masses, does it include the gas inside?
[10:14] <Randomskk> no
[10:15] <nelly11> thanks
[10:15] <Randomskk> np
[10:16] <fsphil> I wouldn't make plans based on that prediction anyway - it'll almost certainly change
[10:17] <Elwell> kick him anyway :-)
[10:17] <Elwell> lazy slacker
[10:19] <fsphil> 3.5m/s ascent puts it nicely between Glasgow and Edinburgh
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[10:46] <cuddykid> btw, fsphil, what do you type to make the dot appear by your name, like when you said "kicks Hibby"! Always wondered but never figured out lol
[10:47] <DanielRichman> cuddykid: /me
[10:47] <cuddykid> thanks!
[10:48] Action: fsphil likes /me
[10:48] <DanielRichman> I see what you did there
[10:48] <cuddykid> lol
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[10:53] <fsphil> ot - anyone used openshot video editor?
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[11:51] <Hibby> lovely little camera, curtesy of mr Elwell
[11:51] <Hibby> https://www.argentdata.com/catalog/product_info.php?cPath=33&products_id=150&osCsid=2c2ce3d55d903ce41400eef8a05eaf6a
[11:52] <Laurenceb> f=open('/dev/rfcomm4','rb',buffering=10000)
[11:52] <Laurenceb> how come i can cat /dev/rfcomm4
[11:52] <Laurenceb> but that doesnt wrok?
[11:54] Action: SpeedEvil hugs strace.
[11:55] <futurity> Hi has anyone tried the Hope RF cheap 433MHz modules at all?
[11:56] <futurity> they seem to have a chip on them that you speak to and select the desired frequency you want to use
[11:56] <futurity> might be useful to dynamically select different frequencies if more than 1 balloon is being launched at the same time perhaps
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[12:19] <Laurenceb> the sparkfun ones?
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[12:20] Action: Laurenceb prefers despair rf
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[13:50] <griffonbot> Received email: Kevin Glinka "[UKHAS] Re: UK Balloon Flight Guidelines"
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[13:58] <griffonbot> Received email: Adam Greig "Re: [UKHAS] Re: UK Balloon Flight Guidelines"
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[14:39] <Laurenceb> http://www.theregister.co.uk/2011/05/24/skylon_esa_report/
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[14:41] <fsphil> problems Dan-K2VOL?
[14:42] <Dan-K2VOL> Indeed, sorry
[14:42] <SamSilver> that skylon sure looks slippery
[14:42] <Dan-K2VOL> My wifi base station 5ghz network is restricting my throughput to about 400kbps, and I'm 3 ft away from it
[14:43] <Dan-K2VOL> Changing settings
[14:44] <SamSilver> http://abstrusegoose.com/196
[14:44] <fsphil> ah no apologies necessary :) just curious
[14:45] <fsphil> curious/nosey :)
[14:45] <futurity> Laurenceb: yes the sparkfun ones. I'll check ou tthe despair rf modules thanks
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[14:56] <SamSilver>  ·      · ·  ·  ·  · ·   · · · · · · · · ·  · ·
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[15:10] <jiffe99> I'm doing some cold testing on my transmitter, given the conditions aren't duplicating that of the atmospheric conditions encountered at high altitude, but the transmitter only seems to last about 30min before I stop receiving
[15:10] <SpeedEvil> Measure battery voltage, and receiver temp
[15:11] <Hibby> hmm
[15:11] <fsphil> what kind of battery?
[15:12] Action: Hibby spots a hab project on crowdfunder with a somewhat familiar website attached
[15:12] <jiffe99> 3 cell lipo
[15:12] <jiffe99> battery voltage is 11.6V
[15:13] <jiffe99> I'm betting when it transmits that voltage is plummeting
[15:13] <Hibby> http://www.joshingtalk.com/
[15:14] <SpeedEvil> http://fatpita.net/?i=187 - another conservation law revealed!
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[15:41] <cuddykid> has anyone used the dallas semiconductor (DS18S20+) temp sensor with arduino? I'm trying to get one up and running!
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[15:52] <Hibby> cuddykid: I used the 18B20, which is differently addressed
[15:52] <Hibby> but the same idea.
[15:53] <cuddykid> yeah, just reading an article on the arduino website now :) was it hard to interface etc?
[15:53] <Hibby> cuddykid: once I found the dallas library, it all worked nicely
[15:54] <cuddykid> good, i'm going to try and add a few sensors to mine, as I'm getting bored with this huge wait for notam!
[15:54] <cuddykid> which pin did you connect the bus from temp sensor to on arduino?
[15:55] <Hibby> try and remember...
[15:55] <Hibby> i had a 5v line, 0V line and data bus connected to pin 5 on the arduino
[15:56] <cuddykid> cool, thanks!
[15:56] <Hibby> think there was a 4.7k across the power and ground lines and I had 3 sensors attached
[15:56] <Hibby> code lives here: https://github.com/Hibby/Strathclyde-HAB-Project/blob/master/fusen_computer/fusen_computer.pde
[15:56] <Hibby> I had to find the addresses, but there's code on t'internet that'll let you do that
[15:59] <Hibby> and the library, whilst increasing the binary size, made life easier as i could just call sensors.requestTemperatures and then effectively printf the values
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[16:14] <cuddykid> thanks hibby!
[16:14] <griffonbot> Received email: Steve Randall "Re: [UKHAS] Re: UK Balloon Flight Guidelines"
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[16:21] <griffonbot> Received email: John Graham-Cumming "Re: [UKHAS] Re: UK Balloon Flight Guidelines"
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[16:55] <Laurenceb> how do i upload to github with git?
[16:55] <Hibby> git push
[16:55] <Laurenceb> oh yeah i remebr
[16:56] <Hibby> assuming you've commited all changes
[16:56] <Hibby> git commit -a
[16:57] <Hibby> and the computer is recognised by github/etc/etc/et
[16:57] <Laurenceb> i need to finish the message entry thing
[16:57] <Laurenceb> cant escape from the terminal
[16:57] <Hibby> oops
[16:57] <Laurenceb> commit_editmsg
[16:57] <Laurenceb> how do i get out of it?
[16:57] <Hibby> ah
[16:57] <Hibby> esc key :wq
[16:57] <Hibby> assuming it's vi
[16:58] <Laurenceb> no
[16:58] <Laurenceb> ive gtg
[16:58] <Hibby> ctrl-c
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[17:10] <griffonbot> Received email: Oliver de Peyer Astrobiologist "[UKHAS] Re: UK Balloon Flight Guidelines - radioactive substances"
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[17:45] Action: griffonbot is GriffonBot [http://github.com/ssb/griffonbot]
[17:45] Action: griffonbot is following: #arhab #ukhas #cusf #atlasballoon
[17:45] Action: griffonbot is tracking emails sent to ukhas@googlegroups.com
[17:45] <natrium42> it's ok, griffonbot
[17:51] <jonsowman> shush griffonbot, or you will die. don't say I haven't warned you
[17:51] <fsphil> poor bot
[17:52] <jonsowman> :)
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[17:57] <Lunar_Lander> hello
[18:06] <fsphil> hihihi
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[18:39] <Lunar_Lander> hi Dan-K2VOL cuddykid
[18:48] <cuddykid> good day Lunar_Lander!
[18:48] <cuddykid> right.. now to try and set up the temp sensors..
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[19:03] <mattltm> Hi all :)
[19:04] <earthshine> hi
[19:05] <mattltm> I need some component storage. Anyone have any suggestions?
[19:05] <mattltm> Idealy wall mounted draws of some kind.
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[19:24] <Lunar_Lander> back
[19:26] <TangoAlpha> front
[19:27] <mattltm> Left?
[19:27] <cuddykid> can someone help with this interfacing of the dallas temp sensor (DS18S20+)... I'm using the arduino library available however the temp reading is either -127.00 (parasite mode) or 0.00 in normal mode :S ahh!
[19:27] <TangoAlpha> Right!
[19:27] <Lunar_Lander> xD
[19:27] <Lunar_Lander> hi mattltm
[19:30] <Upu> cuddykid 1 sec
[19:30] <Upu> http://www.milesburton.com/?title=Dallas_Temperature_Control_Library#Supported_Devices
[19:30] <Upu> http://www.milesburton.com/images/e/e5/Schematic-dallas-18s20.gif
[19:31] <Upu> I ran in parasitic mode
[19:31] <cuddykid> using exactly that setup upu! was following that diagram
[19:31] <Upu> broken ?
[19:31] <Upu> got another one ?
[19:31] <cuddykid> yeah, tried 2
[19:32] <Upu> I trashed my first one
[19:32] <Lunar_Lander> hi Upu
[19:32] <Upu> try reinitialise it
[19:32] <Upu> I had to put some code in my FC to catch them being silly like that
[19:32] <Upu> hi there Lunar_Lander
[19:32] <cuddykid> I think I've frazled the other though lol, seemed to be extremely hot when I touched it! Realised that I wasn't using resistor properly
[19:33] <Upu> yeah you've broken it
[19:33] <Upu> thats what I did :)
[19:33] <Lunar_Lander> ohh!
[19:34] <cuddykid> lol, oh dear
[19:35] <cuddykid> but this one is reading -127.00 too :S, and this hasn't been frazzled!
[19:35] <Lunar_Lander> ohh!
[19:36] <Upu> call the initialisation once or twice with a long delay
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[20:02] <Laurenceb_> Randomskk: ping
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[20:17] <cuddykid> now I'm getting the temp is 85.00 constantly :S !
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[20:31] <cuddykid> can someone confirm... to run temp sensor in none parasite mode.. 5v into V, GND grounded, and the data pin pulled up with 4.7Kohm
[20:39] <cuddykid> Upu, it is the digital pins on arduino that the temp sensor is connected to?
[20:43] <Upu> yeah
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[20:47] <Upu> #define ONE_WIRE_BUS 2
[20:57] Action: Laurenceb_ wonders if he could replace ubuntu with openpilot os on his pc
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[21:03] <cuddykid> yeah done that upu, hmm, will order some Bs instead and try again
[21:03] <Upu> don't pay for them
[21:03] <Upu> Maxim will send you some engineering samples free
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[21:09] <cuddykid> on it
[21:09] <cuddykid> thanks upu
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[21:15] <Laurenceb_> hmm this is interesting
[21:15] <Laurenceb_> i think i understand how ublox firmware works now
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[21:15] <Laurenceb_> it averages dll and pll over a measurement interval
[21:16] <Laurenceb_> and produces navigation solutions every nav interval
[21:16] <Laurenceb_> so you can set a shorter measurement period to get more responsivity, but greater noise
[21:17] <Laurenceb_> also ucenter6 seems to warm if the settings are possible or not
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[21:57] <Randomskk> Laurenceb_: pong
[21:58] <Laurenceb_> oh hi there, i was going to ask about changing baud rates on the fly
[21:58] <Laurenceb_> but i think ive worked it out now
[21:59] <Laurenceb_> just finished adding ublox5 config stuff..but i need to wait for kapton tape to arrive before i can stick the fsa03 on my board
[22:01] <Lunar_Lander> Upu are you still there?
[22:01] <Upu> just about
[22:01] <Lunar_Lander> I saw an arduino tutorial video about I2C
[22:01] <Laurenceb_> i did say i might have a skeleton autopilot working by the weekend... but the amount of stuff to do is just exploding
[22:02] <Upu> any use Lunar_Lander ?
[22:02] <Lunar_Lander> and the man who did this said that every I2C device has a preset ID
[22:02] <Lunar_Lander> is that true?
[22:02] <Lunar_Lander> I think so
[22:02] <Lunar_Lander> wait
[22:02] <Upu> I have no idea :)
[22:02] <Upu> I just stuck 2 on there and they work
[22:03] <Lunar_Lander> ah
[22:03] <Lunar_Lander> here: http://jeremyblum.com/category/arduino-tutorials/
[22:03] <Upu> ta
[22:03] <Lunar_Lander> you're welcome
[22:04] <Upu> will check that out
[22:05] <Lunar_Lander> yea
[22:24] <Upu> bed calls - night
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[22:51] <nelly11> Hi! Where do you guys buy helium for balloon inflation in the UK? I've searched the net and all i seem to find is Helium for small party balloons which is not enough
[22:51] <fsphil> I think most go straight to a BOC dealer
[22:51] <SpeedEvil> I make my helium by hitting lithium with a sledgehammer.
[22:52] <Lunar_Lander> xD!
[22:52] <Elwell> nelly11: http://ukhas.org.uk/guides:balloon_data looks like people use BOC as they're UK prices...
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[22:53] <nelly11> thanks guys
[22:54] <Lunar_Lander> nelly11 how's the rest of your system?
[22:56] <nelly11> not bad...the comms is getting there slowly. we've already ordered the microcrontroller, transmitter and receivers with batteries etc...its just the payload to be tested (deployment mechanism) thats a bit of a headache. I am trying to design a simple solar sail to deploy which seems to be harder than I thought
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[23:10] <Lunar_Lander> yea
[23:10] <Lunar_Lander> wb NigeyS
[23:10] <Lunar_Lander> nelly11 I kinda failed at soldering two sensors
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[23:11] <Lunar_Lander> so now I practise
[23:24] <nelly11> Lunar_Lander, do you practise on more sensors? :)
[23:27] <Lunar_Lander> no, on how to solder
[23:27] <SpeedEvil> Funky http://www.iaea.org/newscenter/news/tsunamiupdate01.html - radiation is even worse than photometrics for units.
[23:28] <SpeedEvil> I think 10 million bequerels/m^2 = around a microwatt a square meter - or one microgray assuming that you absorb all the dose from a square meter. This is about a microseivert per second, or 100mSv/day.
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[23:29] <SpeedEvil> 50, as half the radiation will go down.
[23:29] <SpeedEvil> This is assuming all of the CS137 is on the top.
[23:29] <Elwell> yeah, radiation protection courses are the pits
[23:30] <SpeedEvil> Which is actually quite high - it puts you at the limit for a radiation worker in a day.
[23:30] <SpeedEvil> In an area over about 20km*5km
[23:30] <SpeedEvil> limit for a radiation worker in a year
[23:30] <SpeedEvil> in a day
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[23:57] <nelly11> quick question again, how do you determine the height of the ballon above the ground? do you extrapolate from temperature sensors etc or do you have altimeters onboard
[23:58] <SpeedEvil> GPS
[23:59] <nelly11> someone said to me that GPS service will be stopped above a certain altitude...something along those lines...does anyone know anything about this?
[00:00] --- Wed May 25 2011