highaltitude.log.20110609

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[02:59] <griffonbot> Received email: steamfire@gmail.com "[UKHAS] Water activated cutdown internal parts"
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[04:37] <griffonbot> Received email: Robert Darlington "Re: [UKHAS] Water activated cutdown internal parts"
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[06:48] <jcoxon> morning
[06:50] <eroomde> mornign jcoxon
[06:58] <jcoxon> eroomde, got my rtc working
[06:58] <jcoxon> :-)
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[08:09] <Blackover> morning!
[08:11] <fsphil> morning Blackover
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[08:20] <Blackover> Does exist code for arduino "non-blocking RTTY"?
[08:20] <Darkside> haha
[08:20] <Darkside> yes
[08:20] <Darkside> i wrote some
[08:20] <Darkside> it uses timer interrupts
[08:21] <Darkside> you need to be careful to be sure the interrupt level is lower than the level for the UART, else you start loosing data from the GPS
[08:21] <Blackover> Would you share?
[08:22] <Blackover> don't understand last
[08:22] <Blackover> i'm talking about radio
[08:23] <Darkside> yes
[08:23] <Darkside> i know
[08:23] <Darkside> non0blocking RTTY transmission is going to involve an interrupt
[08:23] <Darkside> this is for a telemetry payload?
[08:23] <Blackover> yes for telemetry
[08:24] <Darkside> http://slexy.org/view/s21lYx5CTC
[08:24] <Darkside> yes
[08:24] <Darkside> so, you'll need to be doing things like reading data from a GPS, right?
[08:25] <Darkside> tbh, i think if you use MsTimer2 it shuld be ok
[08:25] <Darkside> i've been using external interrupts with my code, and they take priority over all other interrupts, including the UART (i.e. how you talk to the gps)
[08:25] <Darkside> code should be pretty self-explanatory, i need to go save some stuff from burning in the oven, i'll be back a little later
[08:26] <Darkside> put that code in a file in the same directory as your other arduino stuff
[08:26] <Darkside> and it should be callable from your main code
[08:33] <fsphil> I've also got some on my github page, used it for hadie
[08:35] <fsphil> not arduino though
[08:35] <Blackover> i've understand a little bit, so now I learn idea of algorithm and arduino's code processing (i'm new in programming). Thanks a lot
[08:36] <eroomde> if it's for an avr it should just work though right? you can just use native c and ignore arduino's pokey libraries :)
[08:38] <fsphil> https://github.com/fsphil/hadie/blob/master/rtty.c
[08:38] <fsphil> https://github.com/fsphil/hadie/blob/master/rtty.h
[08:38] <fsphil> not as well documented I'm afraid
[08:39] <Darkside> heh
[08:39] <Darkside> i made mine as a drop-in module thingo
[08:40] <Darkside> so you give a txbit function which interfaces to your hardware
[08:40] <Darkside> and it provides an function which you call using whatever interrupt you want
[08:43] <Blackover> Tnx. And what about antenna for 70cm? Construction of 1/4 or 5/8 is easier?
[08:43] <Darkside> 1/4
[08:43] <eroomde> almost all of the ukhas flights (nearly 100) have been 1/4 antennas - they work very well
[08:44] <fsphil> +1 for 1/4
[08:44] <fsphil> just don't make it from thin wire soldered together at the last minute
[08:45] <Blackover> and weight? for 1/4 we shou;d use at least tree (often four are used) 1/4 for matching
[08:45] <Darkside> yes, ground-plane is good to have
[08:45] <eroomde> use, 3 or 4 ground rdials are typical for us too
[08:46] <eroomde> we make them out of flexible wire re-inforced with a drinking straw or a cable-tie or something flexible like that - the reason is so as not to damage something (or someone!) that the payload might land on
[08:46] <Darkside> Blackover: http://projecthorus.org/wp-content/uploads/2011/01/6mkrn.jpg
[08:46] <Darkside> theres an example of a VHF 1/4 wave and ground plane
[08:46] <Darkside> thats an example of an antenna that'll poke your eyes out
[08:46] <Blackover> made from wire?
[08:46] <eroomde> Darkside: who's the guy 'just chillin' holding the balloon?
[08:46] <Darkside> that was made from welding rod
[08:46] <Darkside> eroomde: shenki
[08:46] <fsphil> my last one was made from coax, the shielding stripped back to form the radials
[08:47] <Darkside> we were going to put pingpong balls on the ends of the radia
[08:47] <Darkside> but forgot in the end
[08:47] <Darkside> oh well, it landed in a field, meh
[08:47] <eroomde> Blackover: they are in australia so the chance of landing on something is lower. but i would strongly encourage a 'safety first' approach to desiging pointy things like antennas
[08:47] <Darkside> :P
[08:48] <fsphil> less trees to
[08:48] <Darkside> we've almost landeds on cows
[08:48] <Darkside> but never on people, or in populated areas
[08:48] <eroomde> yes, it's actually landing on cows that i fear the most
[08:48] <eroomde> or at least, attach the highest risk to
[08:48] <eroomde> as it's far more probable and expensive and will still get the police called
[08:49] <Darkside> hahaha
[08:49] <Blackover> Darkside Why ground planes are perpendicular main whip?
[08:49] <Darkside> Blackover: because it works?
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[08:50] <eroomde> Blackover: http://en.wikipedia.org/wiki/File:A6-3EN.jpg
[08:51] <eroomde> the radials are an approximation of an infinitely large flat ground plane
[08:51] <Darkside> yes, that too :P
[08:51] <fsphil> in theory tilting them away from the radiating element will provide a better match for 50ohms
[08:51] <fsphil> but I don't think it matters too much
[08:51] <eroomde> eeeek
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[08:51] <Darkside> what would be better is cross-dipoles
[08:51] <eroomde> i think in theory they need to be perpendicular
[08:51] <Darkside> so you have circular polarization
[08:52] <eroomde> but in a practical antenna realisation a bit of tilt might help match
[08:52] <Blackover> but for good swr they might be like there: http://www.w7tck.org/_misc/so-239_ant.html
[08:52] <Darkside> Blackover: its not going to matter too much
[08:52] <Darkside> you're going to have LoS to the payload most of the time
[08:52] <eroomde> Blackover: I think that configuration is also to adjust the radiation pattern
[08:52] <eroomde> to make more energy go towards the horizon, which is what you want on your house roof
[08:53] <eroomde> but it's not so ideal for a balloon where you want to be transmitting more down
[08:53] <Darkside> mm, we're moving away from 1/4 wave monopoles, they have problems when you're directly below them
[08:53] <eroomde> but they're also at their closest then
[08:53] <eroomde> at least
[08:53] <Darkside> a circularly polarised cross-dipole would be much better
[08:54] <fsphil> the signal got very weak when we drove under the payload last weekend, but it was still decodable
[08:55] <Darkside> mm
[08:55] <Darkside> we've had situations where we couldn't decode when underneath
[08:55] <Darkside> but we do have a cross-dipole on the truck, so that shouldn't be a problem anymore
[08:55] <eroomde> maybe a big wheel would be good too
[08:55] <eroomde> not such a mega-null
[08:55] <fsphil> possible the antenna on the payload was at an angle, so we where not directly in the null
[08:55] <Darkside> http://pipe2.darklomax.org/pics/2011-05-21_Foxhunting_Prep/Images/7.jpg
[08:55] <Darkside> black antenna just above the drivers door
[08:56] <Blackover> yes, direct below are antenna minimum, but if u are going to beat a radiolink record it's cood idea to radiate toward horizont
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[08:56] <fsphil> the most important receiver is yours :)
[08:56] <Blackover> i don't have one )
[08:56] <Darkside> >_>
[08:57] <eroomde> Darkside: do people in the street scream 'aaaaah! a tornado must be coming!' when you drive that past them?
[08:57] <fsphil> lol
[08:57] <Darkside> eroomde: we don't get tornados
[08:57] <fsphil> you're bound to
[08:57] <Darkside> Blackover: don't rely on any other receivers
[08:57] <Darkside> fsphil: oh, we do get them
[08:57] <fsphil> heck we get tornadoes (very small ones to be fair)
[08:57] <Darkside> just not in many populated areas
[08:58] <Darkside> Blackover: *always* have your own receiver
[08:58] <fsphil> there was one not far from where my payload landed a few days ago, tore up a shed
[08:58] <Blackover> i have got duplicated radiolink by GPS Spot messenger
[08:58] <Darkside> bah :P thats cheating
[08:59] <Darkside> but for a first flight probably a good idea
[08:59] <Darkside> do the spot GPSes work above 18km?
[08:59] <eroomde> don't believe so
[08:59] <eroomde> natrium managed to graft a ublox onto one a few years ago
[08:59] <Darkside> haha nice
[08:59] <Darkside> well, it'll get lock when it lands anyway
[09:00] <Blackover> I'will not find my landed payload by myself, cause it will be landed in neighbour country
[09:00] <Darkside> aww
[09:00] <fsphil> risky
[09:00] <Darkside> what country?
[09:01] <eroomde> north kora = wrong answer
[09:01] <eroomde> korea*
[09:01] <Darkside> they'd probably declare war over that
[09:02] <Blackover> I'm from Kaliningrad, and Lithuania or Poland are possible
[09:02] <Darkside> can't cross over the borders easily?
[09:03] <Darkside> never bet on anyone but you returning the payload to its owner :P
[09:03] <Blackover> First flight show that it's ok to cross borders
[09:04] <eroomde> hmm, so Kaliningrad is russian but not physically attached to russia?
[09:04] <Blackover> Yes, doesn't atached. only by sea
[09:05] <eroomde> cool
[09:06] <Blackover> so my launch automatically becomes international :P, even without permision
[09:08] <Blackover> first international private (non-goverment) launch
[09:09] <Blackover> looks like prequel for WW3
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[09:16] <fsphil> (IANAL) if you're below a certain weight you can cross a borders without needing permissions
[09:17] <fsphil> and naturally I can't find the document that says that, or remember what the weight is
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[09:25] Action: SpeedEvil wonders why he just had an IMU brochure through the post.
[09:25] <SpeedEvil> http://www.systron.com/
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[10:18] Nick change: Daviey -> Da
[10:18] Nick change: Da -> Daviey
[10:19] <Laurenceb> http://www.systron.com/products/mmqg
[10:19] <Laurenceb> not too bad
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[10:19] <Laurenceb> apart from the fact its stupidly heavy, uses a ton of power and probably costs more than a house
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[10:29] <Darkside> uBlox have an internal navigation gps chipset too
[10:30] <Randomskk> Laurenceb: 28 state kalman filter
[10:30] <Laurenceb> and i thought openpilot were mad
[10:31] <Randomskk> 5mrad attitude accuracy, they claim
[10:31] <Laurenceb> im getting better than that
[10:31] <Laurenceb> but when stationary :P
[10:31] <Randomskk> theirs is in dynamic motion :P
[10:32] <Laurenceb> oh i discovered why my cal code didnt work that well
[10:32] <Laurenceb> magno nonlinearity caused by susceptibility of some of the components
[10:33] <Laurenceb> im stuck with ~4millirad rms pointing error
[10:34] <Laurenceb> i was looking at the openpilot altitude code - if you use baro and gps to find sea level pressure you can do some interesting stuff
[10:34] <Laurenceb> run a seperate kalman filter to find sea level pressure
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[10:41] <Laurenceb> if that filter converges before sea level pressure has changes too much, then you can correct the take off altitude
[10:41] <Laurenceb> so you can do precision landings
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[10:42] <Laurenceb> at arbitrary time after takeoff
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[11:25] <m0lep> ello
[11:26] <mattltm-alt> Hi m0lep :)
[11:32] <m0lep> How's things?
[11:36] <m0lep> Hmmm... Doesn't look like I'm getting much signal out...
[11:41] <griffonbot> Received email: Brad Luyster "Re: [UKHAS] Water activated cutdown internal parts"
[11:42] <mattltm-alt> m0lep: Much signal?
[11:43] <m0lep> Well, I've only got the FT-817 here, plus about 15 metres of RG-58mil, and a dipole, so there's lots of scope for signal loss.
[11:44] <m0lep> ...and the nearby electric fence, and the metal roof on the house probably don't help...
[11:44] <mattltm-alt> Are you tx or rx?
[11:51] <fsphil> this 70cms? it's a tricky band indoors
[11:55] <m0lep> Heh ;) No, I'm on HF in KI88jp
[11:55] <m0lep> Not sure that 5 watts is going to get heard in Europe...
[11:55] Nick change: m0lep -> LazyLeopard
[11:56] <fsphil> sweet
[12:05] <fsphil> maybe with a slow data mode
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[12:15] <LazyLeopard> Tried PSK31 last night. Will try early evening this evening...
[12:27] <fsphil> are you getting anything with voice? I've never had much luck with just 5 watts
[12:28] <fsphil> I've been heard but not very clearly
[12:30] <LazyLeopard> Oh, from UK I've managed a good thousand miles on 20 metres with 5 watts SSB, but it does take the conditions being right. At present things are rather noisy...
[12:32] <LazyLeopard> Helps to have someone with a tall tower and a big beam at the other end, though...
[12:32] <fsphil> yea
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[13:03] <Laurenceb> http://www.youtube.com/watch?v=0PQa_y24NTs
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[13:10] <griffonbot> Received email: Dan Bowen "Re: [UKHAS] Water activated cutdown internal parts"
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[13:27] <Dan-K2VOL> Afternoon
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[13:58] <eroomde> nice, Dan-K2VOL
[14:08] <Dan-K2VOL> Hi ed
[14:08] <Dan-K2VOL> Thank you
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[14:10] <Dan-K2VOL> Eroomde ^
[14:19] <Laurenceb> http://www.gnuplotting.org/code/world3d.gnu
[14:19] <Laurenceb> ^fun
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[14:32] <junderwood> ping eroomde
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[15:04] <m1x10> 1 week to freedom !!!!!!!!!!!!!!
[15:05] <SamSilver> and then you are a civilian again!
[15:05] <SamSilver> are you gonna grow your hair??
[15:05] <Dan-K2VOL> m1x10 in the army?
[15:06] <SamSilver> Hi Dan-K2VOL
[15:06] <Dan-K2VOL> Hi sam
[15:06] <m1x10> :)
[15:06] <SamSilver> you can call me Dave ;-)
[15:07] <Dan-K2VOL> Ah haha Hi Dave
[15:07] <Dan-K2VOL> is Sam Silver just your superhero name?
[15:08] <SamSilver> Sam is my wifes name and SamSilver is short for "Sam's Silver Haired Lover"
[15:08] <SamSilver> lol
[15:08] <Dan-K2VOL> Very nice
[15:08] Nick change: m1x10 -> m1x10_shower
[15:09] <SamSilver> my first call sign was named after her aswell ZU5SAM
[15:09] <Dan-K2VOL> :-) are you a pilot by any chance?
[15:10] <SamSilver> but this morning I got my unrestricted licence and so now I am a ZS lic holder and no longer a ZU (learners lic)
[15:10] <Dan-K2VOL> Nice!
[15:10] <SamSilver> Dan are you a mind reader?
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[15:10] <Dan-K2VOL> haha no, a wild guess, I have a poem that your nickname reminded me of, I'll PM it to you
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[15:11] <fsphil> hehe, I guessed SamSilver's name first time :)
[15:11] <SamSilver> I started power flying then took up gliding and then bought my own palne
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[15:11] <Dan-K2VOL> Well I don't think that worked
[15:11] <SamSilver> I remember that fsphil
[15:11] <SamSilver> lol
[15:11] <fsphil> flooding, tsk tsk :)
[15:11] <SamSilver> My last air craft was a hotair balloon
[15:11] <Dan-K2VOL> haha
[15:12] <Dan-K2VOL> I tried to paste a 1 page long text to samsilver, I guess IRC doesn't like that
[15:12] <fsphil> if I ever fly in a hot air balloon I'll have to take a 434mhz tracker with me
[15:13] <Dan-K2VOL> have you ever gas ballooned?
[15:13] <SamSilver> nope I have never even seen one IRL
[15:14] <Dan-K2VOL> Interesting, me either
[15:14] <Dan-K2VOL> I thought they were more common in Europe and Africa
[15:14] <Dan-K2VOL> I read aboutsomeone who flew a gas balloon across africa, said it was amazing to sneak up on herds of animals silently just above their heads
[15:15] <SamSilver> gas ballooning is big bucks
[15:15] <Dan-K2VOL> SamSilver here's the poem about silver airplanes: http://pastebin.com/v0EyjrZW
[15:15] <SamSilver> thanx
[15:15] <Dan-K2VOL> Ahhh
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[15:17] <SamSilver> Dan-K2VOL: when did she write that?
[15:18] <SamSilver> it has an olde world charm to it
[15:19] <Dan-K2VOL> I'm not sure, I think it was a long time ago
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[15:22] <Dan-K2VOL> 1920s or 1930s I'd guess
[15:22] <SamSilver> I cut all the elements for my tracking antenna today
[15:22] <Dan-K2VOL> Yagi?
[15:22] <SamSilver> actually two
[15:22] <SamSilver> yip
[15:23] <SamSilver> 6 element 144MHz
[15:23] <SamSilver> 5 element 433MHz
[15:23] <Dan-K2VOL> Oh nice
[15:24] <SamSilver> do you count the driven element ?
[15:24] <SamSilver> if so then add one more to each
[15:24] <Dan-K2VOL> not sure :-)
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[15:25] <SamSilver> will mount them tomorrow and get them tested over the weekend
[15:25] <Dan-K2VOL> what are you using for the mounting rod/
[15:26] <SamSilver> wood
[15:28] <SamSilver> they will be the first ham equipment I will own
[15:29] <SamSilver> going to bend the plastic hard next week as I will be buying all the rest of the stuff I need to get my long duration outfit on the road.
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[15:35] <Dan-K2VOL> Antennas are challenging
[15:37] <SamSilver> Dan-K2VOL: any advice on battery holders?
[15:37] <SamSilver> or is solder the way to go?
[15:38] <Dan-K2VOL> Can't reliably (and sometimes not safely) solder to most batteries unfortunately
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[15:38] <Dan-K2VOL> AA batt holders are fine, just make sure you tape the batteries in tight and lightly cable tie around them
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[15:39] <SamSilver> "lightly" as the ties tighten up in the cold?
[15:39] <Dan-K2VOL> We made a spot welder to connect all the AA cells in the white star packs
[15:39] <Dan-K2VOL> Well, for the holders we had the cable ties deformed the holder enough to disconnect the batteries!
[15:39] <Laurenceb> http://www.youtube.com/watch?v=27QHQVCtWts&feature=player_embedded
[15:39] <Dan-K2VOL> luckily it was found before launch on that flight
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[15:40] <Chingy> Hello :)
[15:41] <Chingy> does anyone know how to use a NTX2 transmitter to send data at a higher bitrate than 300 bauds ?
[15:42] <eroomde> yes
[15:42] <eroomde> increase the bit rate!
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[15:43] <eroomde> it will map the input voltage to a frequency, up to its internal low pass filter, which i think is 3khz though can't remember
[15:44] <eroomde> so you can just increase the frequency of your input wiggle up to the low pass filter cutoff
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[15:49] <fsphil> I've used it up to 1200 baud, but only at short range
[15:50] <fsphil> I think it can go faster when paired with the NRX2, but above 1200 baud the bandwidth is greater than the ft817
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[15:54] <eroomde> datasheet lists fm deviation as 3.5khz peak
[15:54] <eroomde> suggesting that's what the lpf is
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[16:01] <fsphil> now 1200 baud from a balloon payload would be interesting
[16:01] <fsphil> if 300 baud works over 500 km, it should be possible
[16:01] <SamSilver> @ 900MHz should be easy
[16:02] <Chingy> ok
[16:02] <Chingy> well, fl-digi had troubles going over 300 bauds
[16:02] <eroomde> decoding?
[16:02] <Chingy> yes
[16:02] <Chingy> but another software managed to do 1200 bauds, so i don't know
[16:03] <SamSilver> are we still talking 10mw?
[16:03] <eroomde> hmm, sounds like an fl-digi issue
[16:03] <Chingy> yes SamSilver
[16:03] <Hibby> and thus we have the joy of experimentation
[16:03] <SamSilver> shuuu
[16:03] <SamSilver> afk
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[16:05] <Chingy> ok, gotta go
[16:05] <Chingy> thanks for your thoughts :)
[16:05] <Chingy> ++
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[16:05] <eroomde> no probs
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[16:10] <fsphil> fldigi has only up to 300 baud in the dialog, but I've modified dl-fldigi to go up to 1200
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[16:13] <Hibby> well done rsgb
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[16:14] Action: Hibby has an exam tomorrow, but the papers have yet to arrive at the exam sec's house.
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[16:17] <fsphil> haha
[16:17] <fsphil> not a good sign
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[16:18] <Hibby> nope
[16:19] <Hibby> Apparently, they didn't send out the papers to another exam in our club not two weeks ago
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[18:47] <fsphil> for cutting the cord to hadie:3: http://i.imgur.com/uPjXdl.jpg
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[19:46] <Randomskk> DanielRichman: lol http://www.bbc.co.uk/news/education-13710868
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[19:50] <DanielRichman> Randomskk: IKR
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[20:08] <sbasuita> "A maths question which was impossible to answer because not enough information was given (OCR)"
[20:08] <sbasuita> yay, yet another incorrect fact in a news article about something i actually know about ;P
[20:11] <DanielRichman> it's also not an AS level paper
[20:12] <sbasuita> DanielRichman: d1 is a2?
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[20:12] <Lunar_Lander> hello
[20:12] <DanielRichman> normally. I suppose it's a bit more blurred in maths 'cause the modules can go anywhere [subject to certain rules]
[20:12] <Lunar_Lander> how is the life?
[20:12] <DanielRichman> but I see it as a maths a2 module
[20:13] <DanielRichman> the stereotypical three for maths as are c1c2s1 sbasuita
[20:13] <sbasuita> you're right, it is misleading to say any maths papers are as instead of a level
[20:13] <sbasuita> there are plenty of y13s resitting that need grades for uni
[20:15] <Lunar_Lander> what is the topic?
[20:17] <mixio> hi Lunar_Lander
[20:18] <Lunar_Lander> hello mixio
[20:18] <Lunar_Lander> great that you are here
[20:18] <Lunar_Lander> I had an idea
[20:18] <mixio> Lunar_Lander: http://slaros.blogspot.com/2011/06/flight-system-first-boot-up.html
[20:19] <Lunar_Lander> YAY it lives!
[20:20] <mixio> :P
[20:20] <mixio> whats your idea?
[20:20] <Lunar_Lander> you need this programmer in the current design right?
[20:21] <eroomde> mixio: good work!
[20:21] <eroomde> that's excellent stuff
[20:21] <Lunar_Lander> and I was shown this here a while back: http://arduino.cc/en/Main/Standalone
[20:21] <Lunar_Lander> and that of course relies on that you can remove the chip from an Arduino Uno
[20:21] <Lunar_Lander> my idea was
[20:22] <mixio> eroomde: thx.
[20:22] <Lunar_Lander> could you solder an ZIF socket to the board so that you can take out the chip for programming on the breadboard?
[20:22] <Lunar_Lander> and well done of course mixio :)
[20:22] <mixio> the board is designed to solder a socket
[20:22] <mixio> not straight the mcu
[20:22] <mixio> all modules are modular
[20:23] <mixio> only caps, resistors and regulator are fixed
[20:23] <Lunar_Lander> cool
[20:23] <mixio> even the crystal can be modular but i dont find crystal socket
[20:23] <mixio> sockets*
[20:27] <Lunar_Lander> oh
[20:27] <Lunar_Lander> fsphil said that you need the "strange" frequency because of the camera?
[20:27] <mixio> yes
[20:27] <mixio> 7.3mhz
[20:27] <mixio> http://imagebin.org/157564
[20:28] <fsphil> well, 7.3728 mhz :p
[20:28] <fsphil> difference is important :)
[20:28] <mixio> :P
[20:29] <mixio> fsphil, did u get the payload?
[20:29] <fsphil> not yet, going back on saturday
[20:29] <fsphil> got this to cut the cord: 73728
[20:29] <fsphil> er
[20:29] <fsphil> http://i.imgur.com/uPjXdl.jpg
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[20:30] <mixio> hehe
[20:30] <Lunar_Lander> do you have your CPU in a socket there?
[20:31] <Lunar_Lander> on the imagebin photo
[20:31] <mixio> yes
[20:32] <mixio> the long black scip
[20:32] <mixio> chip
[20:34] <mixio> http://shop.moderndevice.com/products/sanguino-chip
[20:35] <mixio> http://shop.moderndevice.com/products/40-pin-dip-socket
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[20:35] <Lunar_Lander> yea
[20:36] <Lunar_Lander> fsphil do you agree that soldering the CPU to the board could be bad?
[20:36] <Lunar_Lander> I think that if the CPU breaks, you'll never get it out again
[20:36] <Lunar_Lander> or that you could break the CPU while soldering
[20:36] <fsphil> unlikely to break though if you take care of it
[20:36] <Lunar_Lander> yea
[20:37] <Lunar_Lander> here
[20:37] <Lunar_Lander> the blue and green wire go to TX and RX of the Arduino's Atmega
[20:37] <Lunar_Lander> the Atmega644P should be able to do that too I think
[20:37] <Lunar_Lander> what do you say?
[20:37] <Lunar_Lander> oh sorry
[20:37] <Lunar_Lander> here: http://arduino.cc/en/uploads/Main/arduinobb_14.jpg
[20:38] <fsphil> not sure what you mean
[20:38] <Lunar_Lander> well
[20:38] <Lunar_Lander> the red breakout is for connecting an USB
[20:39] <fsphil> you mean can the tx+rx of the atmega644p be connected to the other avr tx+rx?
[20:39] <Lunar_Lander> no
[20:39] <Lunar_Lander> that you can exchange the AVR on the photo with the Atmega644P
[20:39] <fsphil> doubt it
[20:39] <fsphil> it's bigger for one
[20:40] <fsphil> the pins will probably be in different places
[20:40] <Lunar_Lander> that I just checked
[20:40] <Lunar_Lander> the manual for the atmega644p is a 500 pg thing :S
[20:44] <fsphil> all the important bits are at the start :)
[20:51] <Lunar_Lander> yeah
[20:52] <Lunar_Lander> the pinout is on pg. 2
[20:52] <Lunar_Lander> :)
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[21:49] Nick change: Snomi -> lastfm|snomi
[21:49] Nick change: lastfm|snomi -> Snomi
[21:54] Nick change: Snomi -> lastfm|snomi
[21:54] Nick change: lastfm|snomi -> Snomi
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[22:22] <jcoxon> evening all
[22:26] <Lunar_Lander> hello jcoxon
[22:26] <Lunar_Lander> how are you?
[22:26] <fsphil> hey hey
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[22:29] <jcoxon> good thanks
[22:29] <jcoxon> fsphil, rtc is working
[22:29] <jcoxon> and i've added interrupt power saving
[22:29] <jcoxon> so the avr powers back up when the alarm goes up
[22:30] <fsphil> sweet
[22:30] <fsphil> how much power does the rtc use?
[22:30] <Upu> where did you find the Canadian fsphil ?:)
[22:31] <fsphil> he found us lol
[22:31] <Upu> haha fair enough ok night !
[22:31] <jcoxon> fsphil, 400uA
[22:31] <fsphil> night Upu
[22:31] <Lunar_Lander> gn8 Upu
[22:32] <fsphil> that'll run for months jcoxon
[22:32] <jcoxon> i know!
[22:35] <fsphil> what charger are you using?
[22:35] <jcoxon> max1555
[22:42] <Laurenceb_> Randomskk: ping
[22:43] <jcoxon> fsphil, next job is setting up the gps
[22:44] <fsphil> that should be the easy bit!
[22:44] <jcoxon> well i need to sort the power supply bit
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[22:54] <Lunar_Lander> gn8
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[23:28] <Dan-K2VOL> hello late nighters
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[00:00] --- Fri Jun 10 2011