[00:01] <Lunar_Lander> hi earthshine
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[03:59] <Darkside> http://pipe2.darklomax.org/pics/2011-05-21_Foxhunting_Prep/
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[07:29] <SamSilver> Jasperw: good morning
[07:30] <SamSilver> bbl
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[07:57] <griffonbot> @assgoblin13: RT @LVL1WhiteStar: QFH antenna goes to the farm to double check low SNR. Lagrange KY #arhab http://t.co/vWLxBt0 http://t.co/iufNlqG htt ... [http://twitter.com/assgoblin13/status/72209432204939264]
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[09:18] <TangoAlpha> is there anyone near me (newbury, uk) that can help me verify that a radio i bought from ebay is functioning correctly?
[09:22] <TangoAlpha> "near me" could be a radius of 50 miles
[09:25] <Randomskk> maybe a local repeater?
[09:25] <Randomskk> most of them will play a little beep back at you to indicate you keyed it on correctly
[09:26] <TangoAlpha> anyone who knows more than me (not far off zero) about radios
[09:26] <TangoAlpha> i have an ntx2 but i think it's not working correctly
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[09:26] <Randomskk> oh, it's the ntx2 you want to test?
[09:26] <TangoAlpha> i just want to rule out the radio being faulty
[09:26] <Randomskk> do you have any radio receivers?
[09:27] <TangoAlpha> i have a yaesu ft 790r that i bought off ebay last week
[09:27] <Randomskk> okay
[09:27] <TangoAlpha> i think i have it tuned in correctly to 434.650
[09:27] <Randomskk> so basically there are things called repeaters scattered around the country - you talk to them on a radio such as your yaesu, and they re-broadcast what you say (on another frequency) so other people can join in
[09:27] <TangoAlpha> osme times i can hear a faint warble that matches my ntx2 transmitting
[09:27] <Randomskk> when you stop talking they tend to broadcast a short pip to let you know they heard you
[09:28] <Randomskk> so you could try that
[09:28] <Randomskk> otoh really your ntx2 should just work - make sure you have your radio in the right mode and the ntx2 is powered up
[09:28] <Randomskk> and volume's up on the radio etc
[09:28] <TangoAlpha> there's a lot of hiss compared to the warbling
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[09:40] <Upu> you got it linked to an Arduino TangoAlpha ?
[09:43] <TangoAlpha> yes i have
[09:44] <TangoAlpha> i think i've found a signal
[09:44] <TangoAlpha> :-)
[09:44] <TangoAlpha> might be that i was reading the display wrong
[09:44] <TangoAlpha> 434.650 seems to be displayed as 4.650.0
[09:54] <Upu> are you on the wrong band ?
[09:55] <Upu> 434.650 will be displayed as 434.650.00
[09:56] <TangoAlpha> i have a 5 digit display on the radio
[09:56] <Upu> what radio is it ?
[09:56] <TangoAlpha> yaesu ft790r
[09:56] <TangoAlpha> it does 430-440mhyz
[09:57] <Darkside> that makes sense
[09:57] <Darkside> 43 4.650.0
[09:57] <TangoAlpha> the best/clearest signal i have heard is right now when it say 4.650.0
[09:57] <TangoAlpha> at the moment, i can't get dl-fldigi to decode it
[09:57] <Darkside> are you hearing both tones?
[09:58] <TangoAlpha> i assume i can hear two tones
[09:58] <Darkside> assuming the NTX2 is on frequency, you will need to tune either above or below 434.650 to be able to hear both tones
[09:58] <TangoAlpha> it sounds very much like a sample i downloaded a few weeks ago from someone's blog
[09:58] <Darkside> could you be on teh wrong sideband?
[09:58] <Darkside> you can press the 'rv' button on dl-fldigi
[09:59] <TangoAlpha> wow, thanks for that darkside
[09:59] <TangoAlpha> it works :-)
[09:59] <Darkside> it means you're tuned on the wrong sideband
[09:59] <Darkside> are you on USB or LSB on the ft790?
[10:00] <TangoAlpha> i have a rotary awitch that has losb, usb, cw, rev, fm, simp and +
[10:00] <TangoAlpha> losb -= lsb
[10:00] <TangoAlpha> it is set to lsb
[10:00] <Darkside> ok
[10:00] <Darkside> use usb
[10:00] <Darkside> you might have to tune around a bit
[10:00] <Darkside> and then you can turn rv off
[10:01] <TangoAlpha> what is "rv"?
[10:01] <Darkside> it reverses what fldigi thinks is a 1 or a 0
[10:01] <TangoAlpha> ah
[10:01] <TangoAlpha> now guarantee that i have my mark/space the right way round in my circuit, lol
[10:01] <TangoAlpha> now = no
[10:02] <Darkside> if you can receive on USB, it should be ok
[10:02] <Darkside> i can never remember which way mark and space is
[10:02] <Darkside> i just guess, and if i can't decode i reverse it
[10:03] <TangoAlpha> i can hear tones on quite a few frequencies, depending on which one depends on the tone frequency
[10:03] <TangoAlpha> ok, that works without rv
[10:04] <Darkside> TangoAlpha: i'm not sure what the passband of the ft-790 is
[10:04] <Darkside> it looks liek you can tunr it in 100Hz steps
[10:04] <TangoAlpha> yes i can
[10:04] <Darkside> if you look at the waterfall on fldigi, you wills ee the tones move arounf as you tune
[10:04] <TangoAlpha> yep
[10:05] <TangoAlpha> should i aim to get the tones at a certain point on the watefall?
[10:05] <TangoAlpha> the two red lines are at 900 and around 1050 at the moment
[10:05] <Darkside> thats ok
[10:05] <Darkside> when you launch the transmitter will shift in frequency, and you will have to re-tune to follow
[10:07] <TangoAlpha> should i be dropping the enable line on the ntx2 in between sends?
[10:07] <Darkside> nah
[10:07] <Darkside> if you keep a tone broadcasting fldigi keeps track of the signal better
[10:08] <TangoAlpha> that's what i found, but didn't want to break any rules about broadcasting
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[10:08] <Darkside> TangoAlpha: its ok
[10:08] <Darkside> just keep broadcasting, most of us do
[10:08] <TangoAlpha> :-)
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[10:08] <TangoAlpha> i'm happy now, major step forward
[10:10] <Upu> grats :()
[10:10] <Upu> er :)
[10:10] <TangoAlpha> thank you everyone for helping a complete radio newbie
[10:11] <Darkside> TangoAlpha: have a look at the waterfgall display and tune around
[10:11] <Darkside> get some intuition on how tuning sideband works
[10:11] <Darkside> you'll need it when trying to track the telemetry as the balloon is flying
[10:14] <TangoAlpha> i there anyone that can change the baud rate on my spacenear.us/robertharrison.org data?
[10:17] <Darkside> i think you need to speak to natrium42
[10:19] <TangoAlpha> right, i can now happily sit down and watch the spanish grand prix knowing my rx/tx works :-)
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[11:20] <griffonbot> @Ronaldo_Yemen: Republican guards celebrating unity day , their way, killing one guy & injuring another Two in #Arhab #Sanaa 22nd May. #Yemen #YF #GCC [http://twitter.com/Ronaldo_Yemen/status/72260519326777344]
[11:22] <griffonbot> @Hamoud_Saleh: RT @Ronaldo_Yemen: Republican guards celebrating unity day , their way, killing one guy & injuring another Two in #Arhab #Sanaa 22nd Ma ... [http://twitter.com/Hamoud_Saleh/status/72260947389063169]
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[11:36] <griffonbot> @mohmf: RT @Ronaldo_Yemen: Republican guards celebrating unity day , their way, killing one guy & injuring another Two in #Arhab #Sanaa 22nd Ma ... [http://twitter.com/mohmf/status/72264450614378496]
[11:37] <SpeedEvil> Argh! :)
[11:46] <fsphil> who'd have thought amateur hab'ing would be so violent :)
[11:55] <cuddykid> lol
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[12:12] <Hibby> lolol
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[14:20] Action: SpeedEvil sighs.
[14:20] <SpeedEvil> Stupid forecast for tomorrow.
[14:20] <SpeedEvil> I'm trying to get up the energy o go outside and tie stuff down.
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[15:55] <Lunar_Lander> hello
[15:56] <Lunar_Lander> hi GW8RAK! nice to see you
[15:56] <Lunar_Lander> I got a question
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[16:11] Action: NigeyS is away: I'm busy
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[16:16] Nick change: GW8RAK_ -> GW8RAK
[16:31] <Lunar_Lander> hello GW8RAK
[16:35] <jonsowman> ping eroomde
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[16:54] <cuddykid> Wish is this notam would hurry up!
[16:57] <Lunar_Lander> hi cuddykid
[16:58] <cuddykid> hi Lunar
[17:04] <Lunar_Lander> where is GW8RAK
[17:05] <fsphil> know that feeling cuddykid
[17:05] <cuddykid> awful isn't it!
[17:07] <Lunar_Lander> yeah
[17:11] <fsphil> long-range predictions are so... unpredictable
[17:11] <fsphil> http://habhub.org/predict/#!/uuid=593050b9ddd8128e6234af3b33d2f8a875e75890
[17:11] <fsphil> this-morning that same prediction had it landing near the launch site
[17:12] <Lunar_Lander> fsphil I recently took the landing site predictions for the same launch time
[17:13] <Lunar_Lander> at like T-40 m, t_30m, up to T-1 m
[17:13] <Lunar_Lander> I have to try to plot the variations or so
[17:26] <danielsaul> Don't suppose the spacenear.us tracker source is anywhere? github? Just interested :D
[17:29] <Lunar_Lander> jonsowman ? question for you
[17:34] <GW8RAK> Hi Lunar_Lander, sorry, I was cutting the grass
[17:35] <Lunar_Lander> np
[17:35] <Lunar_Lander> that is also important :)
[17:35] <Lunar_Lander> hello
[17:35] <GW8RAK> And we have a large amount of grass to cut
[17:36] <Lunar_Lander> i got a question to your dream payload thread post
[17:36] <Lunar_Lander> yeah
[17:36] <GW8RAK> Ask away
[17:36] <Lunar_Lander> and then everything needs to be carried to a green cut container?
[17:36] <GW8RAK> Not here, just throw it all at the end of the field
[17:37] <Lunar_Lander> ah
[17:37] <Lunar_Lander> here we got those: http://www.mutlangen.de/servlet/PB/show/1229303_l1/20070512%20Grncontainer.JPG
[17:37] <Lunar_Lander> or this around the corner: http://www.bissendorf.de/pics/medien//big_image_1257426752660.jpeg
[17:37] <Lunar_Lander> well
[17:37] <Lunar_Lander> in the post, did you mean this? http://en.wikipedia.org/wiki/Electron_capture_detector
[17:39] <GW8RAK> Yes, that is it. A beta source passing across the chamber produces a current when there are no halogenated compounts. If a halogenated compound passes through, down to perhaps 100 atoms, some of the beta particles are captured and the current drops.
[17:41] <Lunar_Lander> yeah
[17:41] <Lunar_Lander> can it find out what halogen it is?
[17:42] <GW8RAK> No it can't identify the halogen. It can't discrimate between a high concentration of a low capture compound and a small amount of a high capture compound.
[17:43] <GW8RAK> Quantity wise, that should read down to 100 molecules of a CFC or pesticide, which has multiple halogen atoms in the molecule.
[17:43] <Lunar_Lander> yea
[17:43] <Lunar_Lander> that is good
[17:44] <Lunar_Lander> well
[17:44] <Lunar_Lander> Wiki gives 370 MBq
[17:44] <GW8RAK> Or you can use the beta source to ionise the compound and by ramping a potential along a tube, you can get a basic time of flight mass spectrometer
[17:44] <Lunar_Lander> yeah
[17:44] <Lunar_Lander> 370 MBq is not much
[17:44] <Lunar_Lander> that is also a good idea
[17:45] <GW8RAK> This works even at stp, so at altitude with low pressures, it should work well.
[17:45] <GW8RAK> This is one way of sniffing for bombs and explosives in airports.
[17:45] <Lunar_Lander> yeah
[17:45] <Lunar_Lander> that is interesting
[17:47] <GW8RAK> As we envisaged it, when you walk through the metal detector, it also sniffs the air around you. Lack of vacuum technology makes it fast and cheap.
[17:48] <Lunar_Lander> yeah
[17:48] <Lunar_Lander> I think that was on TV once
[17:48] <Lunar_Lander> if it is OK, the doors in front of the person open
[17:49] <Lunar_Lander> if not, they stay shut and an alarm sounds
[17:49] <GW8RAK> Provided you can get the beta source, it shouldn't be difficult to reproduce for a balloon.
[17:50] <Lunar_Lander> yeah
[17:50] <Lunar_Lander> the professor who gives me the He and
[17:50] <Lunar_Lander> I
[17:50] <Lunar_Lander> we joked about BTTF the other day
[17:50] <Lunar_Lander> and how difficult it would be to obtain Pu
[17:50] <GW8RAK> Going to build a DeLorean?
[17:50] <Lunar_Lander> and he said that theoretically any material could be ordered
[17:50] <Lunar_Lander> xD
[17:50] <Lunar_Lander> that would be cool
[17:51] <Lunar_Lander> so I assume it shouldn't be a problem to get Ni-63
[17:51] <GW8RAK> I think that it is possible to get Pu samples.
[17:51] <Lunar_Lander> ye
[17:51] <Lunar_Lander> yea
[17:51] <Lunar_Lander> yesterday I read the story of the Radioactive Boy Scout
[17:52] <Lunar_Lander> that was an interesting one
[17:53] <Lunar_Lander> anyways
[17:53] <Lunar_Lander> the Betasonde I talked about
[17:54] <Lunar_Lander> it used Promethium-147 with an activity of 3 GBq
[17:54] <Lunar_Lander> 10 times as much as your detector
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[17:54] <GW8RAK> The article on the ECD in Wikipedia is very wrong. Whoever wrote it knows very little about gas chromatography
[17:55] <Lunar_Lander> yea
[17:55] <Lunar_Lander> and is it true that nitrogen has a low ionization energy?
[17:56] <Lunar_Lander> I doubt that
[17:57] <GW8RAK> I don't know about that, but the Ni foil generates the electrons. It doesn't have to interact with N2. He is normally used as the carrier gas in GC, but I've never heard of methane argon mix.
[17:57] <GW8RAK> That's bonkers.
[17:58] <GW8RAK> The ECD is also so sensitive that it is only used for detecting very low levels and is best used with capillary GC.
[18:00] <Lunar_Lander> yeah
[18:00] Action: SpeedEvil wonders why you can't get small bits of sculpted fibreglass, shaped into a seat.
[18:02] <SpeedEvil> http://www.cowboom.com/deal-of-the-day.cfm
[18:02] <SpeedEvil> For those of us in the US
[18:03] <SpeedEvil> GPS phone tracker cheeop
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[18:06] <Lunar_Lander> GW8RAK !
[18:06] <Lunar_Lander> there are four articles on the sensor
[18:06] <Lunar_Lander> and two are really big!
[18:12] <Lunar_Lander> is NigelMoby NigeyS here?
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[18:20] <Lunar_Lander> skylight! http://img853.imageshack.us/img853/4719/sunp0011.jpg
[18:47] <GW8RAK> Sorry had to dash off Lunar_Lander. Someone brought some bits for my mast.
[18:49] <Lunar_Lander> ok
[18:49] <Lunar_Lander> np
[18:49] <Lunar_Lander> :)
[18:51] <GW8RAK> And just realised I haven't eaten tonight. Back later.
[18:52] <Lunar_Lander> good appetite
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[20:01] <Laurenceb_> http://www.openpilot.org/ <- the new site is pretty good
[20:02] <Randomskk> reckon I should use their code for my quad when it's getting ready?
[20:02] <Laurenceb_> i dunno
[20:02] <Laurenceb_> itd need at least three stm32s for the autopilot
[20:03] <Randomskk> (!)
[20:03] <Randomskk> what do they use?
[20:03] <Laurenceb_> i guess its nice, but it seems overengineered and seems to have modularity fascism
[20:03] <Randomskk> stuff that then
[20:03] <Randomskk> if I'm doing this I'm doing it properly :P
[20:03] <Laurenceb_> one for AES128 datalink madness, one for multithread IMU insanity and one for controlling it all
[20:04] <Laurenceb_> im maing good progress atm
[20:04] <Laurenceb_> *making
[20:04] <Laurenceb_> ive decided on my overall system
[20:05] <Laurenceb_> gps-> dma ring buffer -> itg3200 data ready isr running openpilot imu code -> pid loop -> pwm
[20:05] <Randomskk> sweet
[20:05] <Laurenceb_> thats all handled inside the isr at 125hz
[20:05] <Randomskk> that's a lot of code inside an ISR
[20:05] <Randomskk> generally you want as little as possible there
[20:05] <Randomskk> though if it works, heck
[20:05] <Laurenceb_> then main code is free to leasurely talk to radio and log data
[20:06] <Randomskk> fair enough
[20:06] <Laurenceb_> well i see it like this, i can have 99% of code running inside the isr if theres nothing else important to do
[20:06] <Randomskk> it's fair enough
[20:06] <Laurenceb_> only problem is if you want a copilot
[20:07] <Laurenceb_> tho i guess you could stick the input capture grab code at the end of the isr and itd be ok
[20:07] <Laurenceb_> i have hardware pwm switching on the board, so switching to gnd control is trivial
[20:08] mattltm (~mattltm@ left irc:
[20:08] <Laurenceb_> i can move a load of rogallo code over for the gps and guidance
[20:08] <Laurenceb_> and the openpilot filter should be easy to setup. I have i2c, gps, dma, gpio, pwm working atm
[20:09] <Laurenceb_> so only major headaches are si4432 interfacing and SD card flight data recorder
[20:09] <Laurenceb_> hopefully i may have something useful in a week or two at this rate XD
[20:10] <Laurenceb_> id be tempted to use some openpilot si4432 code, but its looking like they went overkill and itd hammer my processor too much.. the si4432 has inbuilt fifo and packet + CRC hardware, so it should be easy to use
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[20:12] <Laurenceb_> then theres wind vector estimation and altitude stuff, which i havent even thought about yet - anyway ill get this more documented and itll all go on github
[20:14] <Laurenceb_> Randomskk: http://www.flyingrobots.co.uk/store/products/category/autopilots/
[20:14] <Randomskk> that does look nice actually
[20:15] <Randomskk> but allow that, it's all about making my own
[20:15] <Laurenceb_> yeah it runs openpilot 'coptercontrol'
[20:15] <Randomskk> seriously considering my previous idea of a single PCB quadcopter
[20:15] <Randomskk> made out of FR4 and some metal beams screwed into the bottom for support
[20:15] <Laurenceb_> the lame version of poenpilot with diydrones attiude code
[20:15] <Laurenceb_> heh
[20:16] <Laurenceb_> what are your thought of ulf connectors?
[20:16] <Randomskk> I guess I don't really have any
[20:17] <Laurenceb_> heh im thinking for v2 of my dactyl board
[20:17] <Laurenceb_> not sure if they are that practical - if you want weird coax lenghts
[20:18] <Laurenceb_> as you have to buy cables readymade.. guess it saves mass tho
[20:20] <Laurenceb_> stm32 is as easy as avr once you get past the compiler config and clks
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[20:22] <Randomskk> Laurenceb_: haha by and large
[20:22] <Randomskk> the compiler config is fine mostly though I think
[20:22] <Randomskk> or at least, now I've got my stm32 skeleton project up to date it's really easy
[20:23] <Randomskk> it has a lot more registers though, which I think increases complexity a lot
[20:23] <Laurenceb_> im a little confused by dma priority
[20:23] <Laurenceb_> the channels have fixed priorities relative to one another right?
[20:24] <Laurenceb_> so why do you have a dma priority setting?
[20:25] <Randomskk> I think you can adjust priority within priority bands
[20:26] <Laurenceb_> ah i get it now
[20:26] <Laurenceb_> so you have two bits of priority shift
[20:27] <Laurenceb_> i only have one dma anyway
[20:27] <Lunar_Lander> GW8RAK back?
[20:27] <Laurenceb_> also if you have a circular tx dma, will it just loop round forever?
[20:28] <Randomskk> I think when you trigger it you tell it how many bits to send?
[20:28] <Randomskk> possibly infinite in which case I guess it does just keep looping
[20:28] <Laurenceb_> you do, but for circular its the lenght of the buffer
[20:29] <Laurenceb_> when it reaches the top it resets
[20:29] <Randomskk> I don't know what happens when you circular tx then, I guess it does just loop forever
[20:30] <Laurenceb_> guess you have to use flags or interrupts to keep it in check
[20:30] <Laurenceb_> all the circular examples i can find are rx - the periferal address increment feature is neat
[20:30] <Laurenceb_> e.g. loop through that adc channels
[20:30] <Laurenceb_> *the
[20:31] <Randomskk> yea
[20:31] <Randomskk> it has some super neat hardware, that thing
[20:31] <Randomskk> the peripherals are lovely
[20:31] <Randomskk> the fact that TIM1 alone can do everything for a three phase power stage is telling
[20:31] <Laurenceb_> pwm in much nicer than avr, proper devider for e.g.
[20:32] <Laurenceb_> *clock divider
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[20:32] <Laurenceb_> anyone know what the fsa03 starts up as? ie mode, baudrate
[20:33] <Laurenceb_> im guessing 9600 nmea
[20:36] <fsphil> 9600 or 4800, I've seen both
[20:36] <fsphil> er, not 4800
[20:36] <fsphil> 9600 and 38400 baud
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[20:55] <MNSP> Hello All :)
[20:55] <Lunar_Lander> hi MNSP
[20:56] <MNSP> hiya Lunar, good weekend?
[20:56] <Lunar_Lander> yea,thanks
[20:56] <Lunar_Lander> how's you?
[20:57] <MNSP> washed out today, late one last night
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[20:57] <Lunar_Lander> same here
[20:59] <MNSP> funny thing is I woke up at 7ish this morning, but a bit monged this eve
[20:59] <MNSP> :/
[21:00] <MNSP> Oh Jeez, did I miss a launch this weekend?
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[21:19] <Lunar_Lander> hi jcoxon
[21:19] <jcoxon> hello Lunar_Lander
[21:22] <Lunar_Lander> how's life?
[21:23] <jcoxon> not bad thanks
[21:23] <jcoxon> got work tomorrow :-)
[21:23] <Lunar_Lander> cool
[21:23] <jcoxon> or perhaps :-(
[21:23] <Lunar_Lander> mine is OK too
[21:25] <Lunar_Lander> thinking about balloon experiments
[21:25] <jcoxon> :-)
[21:26] <Lunar_Lander> GW8RAK had a nice one
[21:26] <Lunar_Lander> the electron capture sensor for halogens
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[21:35] <Lunar_Lander> and what are you working on jcoxon?
[21:50] <Lunar_Lander> if I may ask
[21:50] <jcoxon> Oh I am a doctor in a hospital
[21:50] <Lunar_Lander> ah
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[22:13] <Laurenceb_> odd...
[22:13] <Laurenceb_> main.c:(.text+0xb6): undefined reference to `Process_Byte'
[22:13] <Laurenceb_> collect2: ld returned 1 exit status
[22:13] <Laurenceb_> Process_Byte is a function i included in a seperate directory
[22:13] <Laurenceb_> the error only appears from the linker
[22:13] <Laurenceb_> im confused
[22:14] <Laurenceb_> maybe the name clashes with something else.. it is a bit obvious
[22:14] <griffonbot> Received email: James Coxon "[UKHAS] UK Balloon Flight Guidelines"
[22:15] <Laurenceb_> nope..
[22:16] <jcoxon> are you actually defining Process_Byte?
[22:16] <jcoxon> or including the lib that the function is defined in?
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[22:18] <Laurenceb_> oh its not being compiled
[22:18] <Laurenceb_> doh
[22:19] <jcoxon> night all
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[23:27] <Lunar_Lander> yeah to pick up the question of MNSP
[23:27] <Lunar_Lander> was there a flight this weekend?
[00:00] --- Mon May 23 2011