highaltitude.log.20100222

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[00:49] <natrium42> yo ed
[00:50] <edmoore> hi natrium42
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[01:50] <juxta> hey natrium42
[01:50] <juxta> any word on BH4 recovery?
[03:01] <natrium42> nope
[03:01] <natrium42> nothing foundyet
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[09:37] <edmoore> Hi all. Subject to the jetstream holding up, we are looking to launch Nova 17 on Wednesday at 1000 UTC
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[09:54] <juxta> sounds good edmoore
[09:54] <juxta> what's Nova 17 got onboard?
[09:54] <edmoore> cool
[09:54] <edmoore> are you on the ukhas mailing list?
[09:54] <edmoore> I just posted
[09:54] <juxta> I was
[09:55] <juxta> but for some reason I dont get the mails anymore
[09:55] <juxta> :(
[09:55] <juxta> I'll sign up again
[09:55] <edmoore> odd
[09:55] <edmoore> well, Badger 2 and Badger Cub
[09:55] <edmoore> they both have downlinks and uplinks
[09:55] <juxta> oh nice
[09:55] <edmoore> and we are testing both, and the comminucation between them
[09:55] <juxta> brilliant - camera too?
[09:56] <juxta> I etched my first DIY board today :)
[09:56] <edmoore> no camera, sozzle. we have actually got a few for A560s on the way from ebay after we dumped the last three in the north sea
[09:57] <juxta> haha
[09:57] <juxta> I'm looking at getting an a560 or a570 too
[09:58] <juxta> what do they go for over there?
[09:58] <edmoore> but this'n is really just to do a test of a fully redunadant electronics system so we can start doing more ambitious things
[09:58] <edmoore> £35?
[09:58] <edmoore> right, got a 10am lecture so I'd better get off
[09:58] <edmoore> bbl
[09:58] <juxta> that's really cheap
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[10:24] <jonsowman> cd /mnt
[10:24] <jonsowman> ls
[10:24] <jonsowman> haha
[10:24] <jonsowman> oops
[10:26] <SpeedEvil> horseporn.avi
[10:29] <SpeedEvil> Laurenceb: http://www.analog.com/en/rfif-components/pll-synthesizersvcos/adf4350/products/product.html
[10:29] <SpeedEvil> shiny
[10:30] <Laurenceb> yeah
[10:30] <Laurenceb> but if you just want ISM band operation RX
[10:30] <SpeedEvil> truue
[10:30] <Laurenceb> a chipcon with the ADC acess trick is fine
[10:31] <SpeedEvil> 135-4.4GHz completely flexible frequency source for $20 or so is insane though.
[10:32] Action: Laurenceb is still looking at Vregs
[10:32] <Laurenceb> cant find data on stm32 clock speed vrs supply voltage
[10:32] <SpeedEvil> It's got an internal reg at 1.8V IIRC
[10:33] <SpeedEvil> it goes to 2V min IIRC
[10:33] <Laurenceb> at full speed~?
[10:33] <SpeedEvil> IIRC, yes
[10:33] <SpeedEvil> the regulator is fixed voltage
[10:33] <SpeedEvil> (and not available externally)
[10:34] <Laurenceb> doh
[10:34] <Laurenceb> of course
[10:34] <Laurenceb> the main core logic is running at 1.8v
[10:35] <SpeedEvil> It would be nice to drop it.
[10:35] <Laurenceb> yeah none of my sensors mind
[10:35] <SpeedEvil> I'm sure it'd run at lower volts at say 250khz
[10:35] <Laurenceb> can easily drop to say 2.8v for the sensors
[10:35] <Laurenceb> pity ublox5 needs 3.3v +-5%
[10:36] <Laurenceb> and VDDA for stm32 needs to be within 300mv of VDDD
[10:36] <SpeedEvil> USB doesn't work under 3V or so - which you prolly don't care about.
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[10:36] <martinsweeney> morning
[10:36] <martinsweeney> Just managed to find myself a Yaesu FT-790r for 70ukp
[10:37] <SpeedEvil> Morning, and not yet.
[10:37] <SpeedEvil> :)
[10:37] <martinsweeney> not yet what?
[10:37] <SpeedEvil> recover
[10:37] <SpeedEvil> y
[10:38] <martinsweeney> ah, I assumed yet
[10:38] <martinsweeney> not*
[10:44] <Laurenceb> SpeedEvil: http://www.ibt-power.com/Battery_packs/Li_Polymer/Lithium_polymer_tech.html
[10:45] <SpeedEvil> Also - that's for new cells - I've been thinking lots about dealing with older cells where the ESR may have risen
[10:45] <SpeedEvil> So my comments may have been based on that
[10:45] <Laurenceb> yeah but ESR is small
[10:45] <Laurenceb> actually maybe not
[10:46] <Laurenceb> yeah I guess if esr doubles its like moving from 1C to 2C
[10:48] <Laurenceb> but in reality you will be discharging a 850mah cell at around 0.2C
[10:48] <N900evil> yeah
[10:48] <Laurenceb> so if you have a 200mv dropout reg you can get >97% of the capacity out
[10:48] <N900evil> in that case not so bad
[10:49] <Laurenceb> even if the ESR trebles
[10:49] <Laurenceb> 850mah cells are around 15grams
[10:49] <Laurenceb> the tronics is going to be considerably heavier
[10:50] <N900evil> I'd been doing the numbers yesterday for something using cells that might have hit half capacity and 10* esr.
[10:50] <N900evil> so was thinking along those lines.
[10:50] <Laurenceb> the thing is I cant find a decent smps that can up and down convert with high efficiency
[10:50] <N900evil> cheaply
[10:51] <Laurenceb> and have a high voltage input without being fried
[10:51] <Laurenceb> if it was going to have a smps, a buck regulator wouldnt help
[10:51] <N900evil> digikey parametric selector found some.
[10:51] <Laurenceb> LM3670 is nice - but 5.5v maximum
[10:52] <N900evil> 14v in max
[10:52] <Laurenceb> if its going to have a switcher, might as well be able to run off a few lipos
[10:52] <N900evil> signetics?
[10:52] <Laurenceb> LM3670 is national
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[10:53] <N900evil> no - one I found.
[10:56] <Laurenceb> link?
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[10:58] <MikeMc68_> morning
[10:59] <N900evil> morning
[11:03] <Laurenceb> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MAX1672EEE%2B-ND
[11:05] <Laurenceb> big but lots of nice features
[11:05] Action: Laurenceb likes fig 3
[11:12] <Laurenceb> do sma connectors tend to be magtetised?
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[11:15] <MikeMc68_> not always
[11:15] <martinsweeney> morning, edmoore
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[11:29] <Laurenceb> N900Evil: http://avnetexpress.avnet.com/store/em/EMController/Linear-Regulator/austriamicrosystems/AS1362BTTT33/_/A-7547770/An-0/R-7547770?action=part&catalogId=500201&langId=-1&storeId=500201&listIndex=6
[11:38] <SpeedEvil> yeah - tehre are lots of possibly suitable LDOs
[11:38] <SpeedEvil> how are you thinking of doing the undervoltage lockout?
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[12:11] <edmoore> greetings jonty
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[12:39] <Laurenceb> SpeedEvil: good ponit
[12:39] <Laurenceb> I have battery monitoring with the stm32 adc
[12:39] <Laurenceb> but really want a gpio onto the vreg
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[12:41] <Laurenceb> but I think I'm midding the point
[12:41] <Laurenceb> *missing
[12:41] Action: LazyLeopard wonders what the latest on BH4 is?
[12:41] <Laurenceb> as this thing will almost always be used with servos
[12:41] <Laurenceb> hence a 5v rail
[12:43] <Laurenceb> the way I did it on the rogallo was two lipo cells
[12:44] <Laurenceb> then two switching supplies
[12:45] <Laurenceb> one to 5v, one to 3.6 or so, then a 3.3v linear reg
[12:51] <SpeedEvil> hmm - true
[12:55] <Laurenceb> stm32 datasheet suggests smps to 3.3v then ldo reg to about 3.1v or so for the analogue
[12:55] <Laurenceb> might try that with a buck reg
[12:56] <Laurenceb> but it will mean it needs a two cell lipo
[12:57] <SpeedEvil> Or you might decide to add a 5V SMPS and power the servos too
[12:59] <Laurenceb> yes - but thatd be on a daughter
[12:59] <Laurenceb> board
[13:00] <Laurenceb> stm32 AN2834
[13:01] <Laurenceb> "If you are using a switching power supply, it is recommended to have a linear regulator to supply the analog stage."
[13:02] <SpeedEvil> hmm
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[13:04] <Laurenceb> figure 23 is interesting
[13:07] <Laurenceb> classifyng things as analogue or digital isnt exactly obvious
[13:08] <Laurenceb> e.g. what about a gps or a ISM band transceiver
[13:13] <SpeedEvil> presumably they simply mean vdda
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[13:14] <Laurenceb> yeah but they suggest two ground planes and supply rails
[13:15] <jonsowman> hi edmoore
[13:15] <Laurenceb> not exactly obvious the best way to devide them up
[13:15] <edmoore> hi
[13:15] <jonsowman> 10am launch on weds?
[13:15] <Randomskk> yo edmoore
[13:16] <edmoore> yep
[13:16] <edmoore> subject to weather etc
[13:16] <Randomskk> considering getting my radio here set up and running for the wednesday launch then VNC home to control fldigi and the radio: worth doing?
[13:16] <Randomskk> are you getting the autorotator on?
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[13:17] <Randomskk> also it looks like all I need for remote control of the icom is a 3.5mm mono minijack and usb-serial?
[13:17] <edmoore> (yes, yes, dunno)
[13:18] <Randomskk> though sadly the CI-V jack doesn't allow for audio data or PTT so I still couldn't use it to have fldigi tx, but otoh it should let fldigi control the frequency and mode
[13:19] <edmoore> correct
[13:20] <Randomskk> what do you connect to for computer-controlled tx?
[13:22] <edmoore> rj45
[13:23] <Randomskk> to the microphone jack?
[13:23] <edmoore> no
[13:23] <edmoore> both
[13:23] <edmoore> so rj45 and jack input
[13:23] <Randomskk> I mean the rj45 microphone connector
[13:24] <Randomskk> hmm
[13:24] <Randomskk> guess I'll go to maplins tomorrow or later today and pick up a 3.5mm mono jack or cable or such
[13:24] <edmoore> just bodge something up based on the pinout schematic
[13:24] <Randomskk> looks like it's an open collector bus so might need a few transistors from the ftdi chip
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[13:45] <gordonjcp> rather than VNCing home it might be worth seeing if you can get multimon to decode the RTTY packets
[13:46] <Randomskk> hurrah
[13:46] <jonsowman> working?
[13:47] <Randomskk> I have computer control of my radio
[13:47] <Randomskk> the fldigi waterfall even shows correct frequencies now
[13:47] <Randomskk> how nice
[13:47] <gordonjcp> anyone in here played with quisk at all?
[13:48] <Randomskk> gordonjcp: multimon?
[13:48] <Randomskk> the advantage of VNCing is that I can tell fldigi where to look at the waterfall but also use it to control radio frequency
[13:49] <Randomskk> hehe, even works to change modes etc
[13:49] <Randomskk> nice
[13:49] <Randomskk> easiest thing to rig up ever
[13:49] <Randomskk> just FTDI dongle, a mono 3.5mm jack
[13:49] <Randomskk> Tx and Rx to the tip
[13:49] <Randomskk> gnd to the sleeve
[13:49] <Randomskk> no other componentsjob done
[13:51] <jonsowman> :)
[13:51] <jonsowman> nice one
[13:51] <jonsowman> gordonjcp: quisk looks interesting
[13:51] <gordonjcp> jonsowman: yeah
[13:51] <gordonjcp> I'm trying to adapt it to use jack
[13:52] <gordonjcp> I took a look at dttsp but it doesn't build any more
[13:52] <gordonjcp> the mailing list is dead, as are all the GUI projects
[13:52] <jonsowman> oh right
[13:52] <gordonjcp> Randomskk: http://www.baycom.org/~tom/ham/linux/multimon.html
[13:53] <edmoore> interesting OS project perhaps useful to us: KST
[13:53] <edmoore> developed for real time telemetry monitoring for balloon flights
[13:53] <edmoore> built by the prof who runs BLAST
[13:53] <edmoore> it has a pretty enormous range of libraries
[13:54] <Randomskk> gordonjcp: ah!
[13:54] <Randomskk> I use soundmodem for the same purpose for APRS decoding
[13:55] <Randomskk> though I believe my radio has packet decoding built in for 1200 and 9600 baud
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[13:57] <gordonjcp> Randomskk: yeah
[13:58] <gordonjcp> I'm planning on making a stripped-down soundmodem with 1200-baud only and jack support
[13:59] <gordonjcp> that's so I can use jack_connect to switch one of two radios between soundmodem, audio playback, live audio streaming and crossband coupling
[14:00] <Randomskk> neat
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[14:04] <Randomskk> okay
[14:04] <Randomskk> now got a little cable setup so I can use fldigi and control the radio
[14:04] <jonsowman> Randomskk: :)
[14:05] <Randomskk> a vnc server on my desktop plus the radio and whip out the window
[14:05] <Randomskk> and the 10-11 materials lecture on wednesday will be a bit better :P
[14:05] <jonsowman> you running fldigi on the desktop?
[14:05] <Randomskk> jonsowman: not sure yet
[14:05] <Randomskk> but control is either from either
[14:05] <Randomskk> mind if I borrow the cable for a few days? :P
[14:06] <jonsowman> keep it tbh
[14:06] <jonsowman> dont need it
[14:06] <Randomskk> may pick up a ftdi thing and solder it up properly at some point
[14:06] <jonsowman> yeh
[14:06] <jonsowman> sounds good
[14:06] <Randomskk> useful thing to have
[14:06] <Randomskk> need to do a PTT+audio one next
[14:06] <jonsowman> whats that like? couple of transistors/diodes thing?
[14:07] <Randomskk> I don't think there's really anything to it
[14:07] <jonsowman> does fldigi trigger PTT from DTR/DTS?
[14:07] <Randomskk> ptt will presumably come from DTR on the FTDI
[14:07] <Randomskk> yea it can
[14:07] <jonsowman> right
[14:07] <Randomskk> and then audio out is just a speaker cable affair
[14:07] <jonsowman> yep
[14:08] <Randomskk> sweet
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[14:09] <Randomskk> edmoore: lifetime from the 3Ahr lipo is great, for rx-only at the least
[14:09] Nick change: Guest6676962 -> smealum
[14:09] <Randomskk> we were running for a few hours and the cell voltage went from 12.25 to 11.8
[14:09] <Randomskk> given as nominal 3S voltage is 11.1...
[14:09] <Randomskk> by cell I mean battery
[14:10] <Randomskk> and a fully charged battery would be 12.6
[14:11] <edmoore> cool
[14:11] <edmoore> ok well may invest
[14:11] <Randomskk> and they are tiny and lightweight
[14:11] <Randomskk> I doubt performance would be as good while Txing but even so
[14:11] <Randomskk> for the mass of a car battery, you could pack a lot of lipos
[14:11] <jonsowman> who needs tx :p
[14:12] <edmoore> quite
[14:13] <Randomskk> cost more otoh
[14:13] <Randomskk> but you don't need the high current rated ones so much
[14:13] <Randomskk> and lower discharge current batteries are cheaper
[14:13] <edmoore> know a good uk suppler?
[14:14] <Randomskk> these ones I have can do 20C which is 60A or so
[14:14] <Randomskk> hmm, not off the top of my head - I got these from hobbycity in HK
[14:14] <Randomskk> there are a load of UK remote control stuff suppliers who will do them though
[14:15] <Randomskk> ic7000 has 22A current draw at 100W tx
[14:15] <SpeedEvil> http://cgi.ebay.co.uk/A123-LiFePo4-4S1P-2300mAh-13-2V-paratactic-packs_W0QQitemZ160399150245QQcmdZViewItemQQptZRadio_Control_Parts_Accessories?hash=item255888cca5
[14:15] <Randomskk> so these batteries are 3x the required current draw
[14:15] <Randomskk> and that's continuous
[14:15] <Randomskk> apparently about 1.3A while receiving
[14:17] <Randomskk> interestingly that would suggest 2 hours total working time from one of them
[14:17] <Randomskk> I suspect that having the loudspeaker off due to audio going to laptop helps a bit
[14:18] <Randomskk> that ebay one is 4S so would be even better theoretically, as far as voltage is concerned
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[14:19] <Lunar_Lander> hello
[14:19] <Lunar_Lander> hallo
[14:19] <Lunar_Lander> sorry
[14:19] <jonsowman> hello Lunar_Lander
[14:19] <Lunar_Lander> how's life?
[14:20] <jonsowman> all good ta, yourself
[14:20] <jonsowman> ?
[14:20] <Lunar_Lander> I'm good too
[14:20] <Lunar_Lander> any news on BH4's fate?
[14:20] <SpeedEvil> nope. :/
[14:20] <jonsowman> havent heard anything from james
[14:22] <Lunar_Lander> man if I had a car I would go there to help looking
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[14:32] <Lunar_Lander> www.cafepress.com/stratosfaira
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[15:09] <edmoore> hi jcoxon
[15:10] <jcoxon> hey edmoore
[15:12] <Lunar_Lander> hi jcoxon
[15:17] <jcoxon> hey Lunar_Lander
[15:17] <jcoxon> woohoo i've now had 80,218 views of my flickr pictures
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[15:53] <jcoxon> BH4 beacon has been heard
[15:53] <jcoxon> !
[15:53] <Randomskk> !
[15:53] <Randomskk> nice
[15:53] <jcoxon> they heard it from 51 52'49" 4 51'53
[15:54] <jcoxon> though its going to be an absolute arse to find
[15:54] <jcoxon> as that beacon rarely transmits
[15:54] <SpeedEvil> woo!
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[15:58] <Lunar_Lander> this place is right on a road
[15:58] <jcoxon> Lunar_Lander, i assume thats where he is, listening for the beacon
[15:59] <jcoxon> rather then where the payload is
[15:59] <Lunar_Lander> oh ok
[15:59] <SpeedEvil> oh
[15:59] <SpeedEvil> does it beacon the location?
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[16:00] <jcoxon> SpeedEvil, nah its a very simple beacon, every 15mins it sends out 3 strings of CW
[16:06] <jcoxon> its worth putting those beacons onboard
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[16:06] <jcoxon> also no risk of being up a tree
[16:07] <jcoxon> more likely floating somewhere :-)
[16:07] <Randomskk> water landing?
[16:08] <jcoxon> lots of rivers around htere
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[16:13] #highaltitude: mode change '+o jcoxon' by ChanServ!ChanServ@services.
[16:14] Topic changed on #highaltitude by jcoxon!jcoxon@host81-153-1-235.range81-153.btcentralplus.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk, wiki.ukhas.org.uk, CUSF Nova 17 Launch 24/2/10 10:00UTC, Chu
[16:20] <LazyLeopard> ...and canals. Could easily be in water, though, presumably, it'll stop transmitting if the electronics gets wet? How long does the CW beacon signal last each time, and what exactly does it say?
[16:22] <jcoxon> approx 1minute per string
[16:22] <jcoxon> it'll stop if its wet
[16:23] <jcoxon> "VVVVV,ATLAS,1/3,HIGH,ALTITUDE,BALLOON"
[16:23] <jcoxon> "VVVVV,ATLAS,2/3,RTTY,434.075,ASCII8,50,350,0,1.5"
[16:23] <jcoxon> "VVVVV,ATLAS,3/3,WWW.SPACENEAR.US/TRACKER/"
[16:23] <Randomskk> does /TRACKER actually work
[16:24] <Randomskk> might be worth running a redirect to /tracker
[16:24] <russss> need to get enough people in the area to triangulate it
[16:24] <sbasuita> Oh, btw, what's the big green circle around the balloon on the tracker?
[16:25] <russss> the balloon's horizon
[16:25] <sbasuita> ah, cool
[16:26] <jcoxon> Randomskk, thats a good point
[16:26] <jcoxon> half expecting people to be typing it in
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[18:04] <MikeMc68> evening
[18:05] <Lunar_Lander> hi
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[18:13] <jcoxon> hey MikeMc68 , like your ds18b20
[18:14] <jcoxon> those are really good value - the ICs on their own aren't cheap
[18:14] <jcoxon> http://www.earthshinedesign.co.uk/index.php?route=product/product&product_id=105
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[18:32] <Twiner> jcoon: Buy get them as samples from Maxim/Dallas instead? (:
[18:32] <Twiner> Jcoxon*
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[18:35] <jcoxon> but these are nice
[18:35] <MikeMc68> Yeah they are nice units
[18:36] <MikeMc68> they've sold like hot cakes
[18:36] <Twiner> Nicely packaged, yeah.
[18:36] <MikeMc68> Only got one left !!
[18:37] <MikeMc68> More on the way though
[18:38] <jcoxon> :-)
[18:40] Nick change: MikeMc68 -> MikeMc68|Away
[18:46] <jcoxon> wow i'm going through post launch blues
[18:46] <jcoxon> something about finishing a project and desperately wanting to do something different
[18:47] <natrium42> hey jcoxon
[18:48] <natrium42> good news about the beacon being heard :)
[18:49] <jcoxon> yeah
[18:49] <jcoxon> it must be nearby - that beacon doesn't have a great range
[18:51] <natrium42> maybe he'll find it today :D
[18:51] <jcoxon> it'll be dark by now
[18:52] <natrium42> btw, added map resizing to the tracker, just drag the bottom (it also stores it in a cookie)
[18:52] <natrium42> ah, right
[18:52] <natrium42> stupid time difference
[18:52] <natrium42> will the beacon last until tomorrow?
[18:54] <jcoxon> yeah i worked it out at a min of 140hrs
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[18:55] <natrium42> excellent
[18:55] <natrium42> bbl, lecture etc...
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[18:56] <jcoxon> ooo the dragging thing is cool
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[19:11] <jcoxon> bbl
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[19:14] <tittux> ?
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[20:45] <Laurenceb> hi
[20:51] <Lunar_Lander> hi
[20:51] <N900evil> hi
[20:52] <H__> has it been found yet ?
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[21:20] <natrium42> o/
[21:21] <G8DSU> Saw a tweet re-tweeted by jcoxon saying it had been heard near 51 52'49" 4 51'53" about 5 hours ago. Seems frustratingly close. Any update on that?
[21:23] <SpeedEvil> yeard near
[21:23] <SpeedEvil> heard near
[21:23] <SpeedEvil> not at
[21:23] <SpeedEvil> the beacon was recieved from that location - the package is not at that location
[21:24] <SpeedEvil> Well - unless it's on the operators roof and they diddn't notice.
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[21:29] <jcoxon> evening all
[21:29] <SpeedEvil> Evening.
[21:29] <natrium42> hey
[21:30] <natrium42> G8DSU, it's too dark now -- they'll probably resume search tomorrow
[21:30] <jcoxon> apparently the weather is terrible
[21:30] <jcoxon> so they'll go looking with a yagi tomorrow
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[21:30] <jcoxon> they translated the CW correctly and made a recording
[21:32] <SpeedEvil> :)
[21:32] Action: SpeedEvil hops.
[21:32] <SpeedEvil> With more e.
[21:32] <jcoxon> lots of rain - so i guess they didn't really look outside
[21:32] <jcoxon> it might be very obvious
[21:33] <SpeedEvil> they did a rough search without yagi?
[21:33] <natrium42> my goal this week is to add the predictor to the tracker
[21:33] <jcoxon> SpeedEvil, i think they just went to our predicted site and listened for it
[21:34] <SpeedEvil> ah
[21:34] <jcoxon> i reckon we've got 2 more days on that beacon
[21:34] <Lunar_Lander> yeah
[21:35] <jcoxon> the signal is strong as well
[21:36] <natrium42> geocaching :)
[21:37] <jcoxon> yeah
[21:39] <jcoxon> it makes me happy that the beacon comes in useful
[21:41] <natrium42> :)
[21:43] <SpeedEvil> Is the beacon a totally seperate circuit?
[21:43] <natrium42> blb
[21:43] <natrium42> *bbl even
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[21:43] <jcoxon> SpeedEvil, yes
[21:44] <jcoxon> atmega168 + radiometrix ntx2
[21:44] <SpeedEvil> Arguments for and against hooking it up to the GPS I guess.
[21:45] <SpeedEvil> screwy GPS triggering software bugs --
[21:45] <jcoxon> yes
[21:45] <jcoxon> more expense
[21:45] <SpeedEvil> I mean wired to the other
[21:50] <jcoxon> i think its probably setup just right
[21:50] <jcoxon> perhaps a bit of watchdog sleeping to extend the battery life a bit more
[21:50] <jcoxon> and a better antenna
[21:50] <SpeedEvil> yeah.
[21:50] <SpeedEvil> More complex risks opopes.
[21:50] <SpeedEvil> oopses
[21:52] <jcoxon> yeah
[21:55] <jcoxon> SpeedEvil, just added a nice simple video about directional antennas to our guide to tracking on the wiki
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[21:55] <jcoxon> http://www.youtube.com/watch?v=lslHtCUSfN4&feature=player_embedded
[21:57] Action: SpeedEvil stabs flash again with a blunt spoon.
[22:00] <jcoxon> hehe
[22:02] <SpeedEvil> Or the linux sound subsystem, or my intel soundcard.
[22:02] Action: SpeedEvil is unsure.
[22:02] <MikeMc68|Away> Hey
[22:02] Nick change: MikeMc68|Away -> MikeMc68
[22:03] <MikeMc68> The beacon was received?
[22:04] <jcoxon> yeah
[22:04] <Lunar_Lander> cool
[22:05] <MikeMc68> that's good news
[22:05] <MikeMc68> it means they must be close
[22:05] <MikeMc68> transmission distance on the ground is going to be way less than in the air
[22:05] <MikeMc68> So if they go out tomorrow they are almost guaranteed to find it
[22:06] <jcoxon> yeah
[22:06] <jcoxon> i reckon 1km radius
[22:06] <MikeMc68> awesome. So with a Yagi they'll track it down.
[22:07] <jcoxon> yeah
[22:07] <SpeedEvil> It's gonna be easy to find.
[22:07] <SpeedEvil> It's in a tree slightly taller than the tallest person + longest ladder + longest pole that can be found.
[22:08] <MikeMc68> lol
[22:11] <jcoxon> if you look on a map where they are its probalby the otherside of hte canal directly infront of htem
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[22:13] <MikeMc68> If it's in any water it will be at the edge somewhere
[22:13] <MikeMc68> It's been windy there
[22:13] <Lunar_Lander> YAY
[22:14] <Lunar_Lander> oh man that is great to hear
[22:18] <MikeMc68> Did it have instructions in Dutch on it? I saw the french ones.
[22:18] <SpeedEvil> french and english.
[22:19] <MikeMc68> Oh man. You know those Dutch don't speak no French or English.
[22:19] <jcoxon> hehe yeah they do
[22:19] <jcoxon> their english is usually better then ours
[22:20] <MikeMc68> You should just have pictures on it
[22:20] <MikeMc68> `Like a map of Europe and a big finger pointing at England
[22:20] <Lunar_Lander> they really do
[22:20] <Lunar_Lander> I read that it is more polite talking to them in English rather than German first if you cannot speak Dutch
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[22:24] <rjharrison> ping jcoxon
[22:24] <rjharrison> Got the hotwire cutter fired up
[22:24] <MikeMc68> Sshhh here's Rick
[22:24] <LazyLeopard> Hi Mike. What have I done now?
[22:25] <MikeMc68> :D
[22:25] <jcoxon> rjharrison, hotcutter? whatcha sculpting?
[22:25] <MikeMc68> Rick James has some good(ish) news
[22:25] <LazyLeopard> Oh?
[22:25] <rjharrison> jcoxon Icarus III Payload
[22:25] <MikeMc68> They located the CW Beacon today so were probably within about 1km before they had to give up
[22:26] <MikeMc68> Tomorrow they will try again with a Yagi
[22:26] <LazyLeopard> I caught that bit earlier. Sounds promising. ;)
[22:27] <LazyLeopard> I've been beating my brain with www.lcwo.net...
[22:28] <MikeMc68> What fun !
[22:28] <jcoxon> Will get the video up of the CW in the car
[22:28] <jcoxon> just emailed to get permission to post it on youtube
[22:28] <rjharrison> the cw?
[22:28] <rjharrison> ooh
[22:29] <rjharrison> cool
[22:29] <rjharrison> so fingers x'ed another recovery
[22:29] <MikeMc68> What video ?
[22:29] <LazyLeopard> I've also been beating my Mac to try to get it to talk to my radio via this cable with an FTDI FT232RL inside it...
[22:30] <rjharrison> I guess video of the dutch in the car near the cw
[22:30] <jcoxon> rjharrison, yeah
[22:31] <jcoxon> rjharrison, any progress with the gps style time/lat/lon?
[22:31] <rjharrison> Not yet
[22:32] <jcoxon> okay cool
[22:34] <MikeMc68> Rick is that via a socket on the back or have you opened it up?
[22:35] <rjharrison> 012345,3442.76,08646.21
[22:35] <rjharrison> How do you read teh lat and long
[22:36] <rjharrison> 34deg42min76 sec?
[22:36] <jcoxon> thats how the gps puts it out
[22:36] <rjharrison> or 34deg and 42.76min?
[22:36] <MikeMc68> 76 secs?
[22:36] <jcoxon> yeah the second
[22:36] <MikeMc68> Must be 0.76 of 60
[22:37] <SpeedEvil> 42.76 = 42 46s about
[22:37] <MikeMc68> 60*0.76
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[22:38] <LazyLeopard> Via a socket on the back of the radio.
[22:39] <MikeMc68> and you've installed the Mac FTDI driver?
[22:39] <LazyLeopard> Yeah. And hacked the Info.plist to get the PID recognised.
[22:40] <MikeMc68> hmm
[22:40] <LazyLeopard> The usbserial device is now visible.
[22:41] <LazyLeopard> When I've got a bit more brain I'll dig deeper. I suspect the Info.plist may need some config stuff.
[22:41] <fsphil> should it not "just work"?
[22:41] <LazyLeopard> fsphil: Yes. ;)
[22:42] <fsphil> ahh
[22:42] <fsphil> plug and pray
[22:42] <MikeMc68> Weird it didn't 'just work' though
[22:42] <MikeMc68> it sure does with an Arduino + FTDI
[22:42] <LazyLeopard> This is the first USB device I've had since the Windows Mobile phone which has given any trouble.
[22:43] <LazyLeopard> Could be I've got something not set right in the radio.
[22:43] <MikeMc68> yeah it's more than likely the radio than the cable + driver
[22:43] <MikeMc68> not a lot to go wrong there
[22:43] <jcoxon> LazyLeopard, welcome to the world of hamlib/rigcat
[22:46] <LazyLeopard> Yay! Got the correct baud rate, and now it works!
[22:46] <MikeMc68> :D
[22:46] <fsphil> controling the radio with fldigi is pretty neat
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[22:47] <Randomskk> jcoxon: woo
[22:47] <Randomskk> I got fldigi controlling my radio today
[22:47] <Randomskk> easiest thing
[22:47] <Randomskk> ftdi bob plus a 3.5mm mono cable from jonsowman
[22:47] <Randomskk> tx+rx to tip, gnd to sleeve, plug in, job done
[22:47] <Randomskk> works perfectly
[22:47] <Randomskk> so now I can control my radio remotely
[22:47] <Randomskk> so I can sit in my materials lecture at 10am on wednesday and VNC to my desktop and track the CUSF launch
[22:48] <fsphil> sweet
[22:48] <SpeedEvil> :)
[22:48] <jcoxon> hehe
[22:48] <Randomskk> much easier than I expected, and everyone online makes such a hassle out of it
[22:48] <Randomskk> this way works really easily
[22:49] <rjharrison> 34(ooh cusf up on wed?
[22:49] <jcoxon> don't have my radio with me so can't track
[22:49] <Randomskk> now I want to get this set up with a cheaper radio and an autorotator so I can leave it at home
[22:49] <Randomskk> rjharrison: yup, 10AM, badgercub+badger2 payload, no cameras or other tricks, just the electronics
[22:49] <jcoxon> Randomskk, you've got a good internet connection in cam - vnc slows down a bit over normal broadband
[22:49] <Randomskk> jcoxon: yea
[22:49] <Randomskk> I can imagine
[22:49] <Randomskk> but X11 forwarding for fldigi would work
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[22:50] <Randomskk> 434.050 and 424.525 mhz rtty 7n2, 50baud, 425 shift apparently
[22:50] <fsphil> I was looking at the autorotators but they all looked very pricey
[22:50] <Randomskk> 7n2, what is even up with that
[22:50] <fsphil> is there a recommended model?
[22:50] <Randomskk> fsphil: planning on making one rather than buying
[22:50] <Randomskk> at some point in the far future
[22:50] <MikeMc68> Launch on Wed ?
[22:51] <Randomskk> it was sent to the ukhas list
[22:51] <fsphil> I'm not so great at building mechanical stuff :)
[22:52] <MikeMc68> i didn't see anything about a launch
[22:53] <jcoxon> http://www.youtube.com/watch?v=a29h2pZaij8
[22:56] <MikeMc68> The poor little thing is squeeking for help
[22:57] <fsphil> "why have you left me here? it's cold and wet, and I'm hungry!" ;)
[22:57] <RocketBoy> Randomskk: why 7n2 - two stop bits - if for synchronization it would be better to send 7n2 and receive 7n1 - is that the plan?
[22:57] <Randomskk> RocketBoy: no idea, just repeating what's in the email
[22:58] <RocketBoy> ah ok
[23:01] <jcoxon> MikeMc68, fsphil its happy i'm sure, cheeping away in its nice polystyrene box
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[23:02] <MikeMc68> It reminds me of this - http://imgs.xkcd.com/comics/spirit.png
[23:02] <jcoxon> hehe yeah
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[23:03] <Lunar_Lander> xD
[23:03] <Lunar_Lander> xkcd rocks
[23:03] <fsphil> it does
[23:06] <jcoxon> xkcd likes balloons - there are quite a few about high altitude balloons with cory doctrow constructing the blogosphere
[23:06] <Lunar_Lander> yeah
[23:06] <MikeMc68> is there a page about the Badger hardware anywhere? I am trying to read up about the uplink
[23:07] <jcoxon> http://www.srcf.ucam.org/~cuspaceflight/wiki/doku.php?id=badgercub
[23:08] <jcoxon> http://www.srcf.ucam.org/~cuspaceflight/wiki/doku.php?id=badger2
[23:09] <MikeMc68> ty
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[23:11] <jcoxon> hopefully the payload will be recovered tomorrow - fingers crossed
[23:11] <SpeedEvil> Indeed.
[23:11] <jcoxon> will then email around a writeup etc
[23:11] <jcoxon> night all
[23:11] <fsphil> night!
[23:11] <SpeedEvil> Night!
[23:11] <SpeedEvil> Good luck.
[23:11] <rjharrison> night
[23:11] <MikeMc68> cya
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[23:15] <LazyLeopard> Hmmm... can the Mac version of fldigi talk to a rig via CAT?
[23:18] <fsphil> should do
[23:18] <MikeMc68> jcoxon would have been the one to ask about that
[23:18] <LazyLeopard> It needs hamlib?
[23:19] <fsphil> I've got a mac here, want me to try?
[23:19] <LazyLeopard> Just wondering what the settings might be...
[23:20] <LazyLeopard> ...and whether hamlib is needed, or just an option.
[23:21] <LazyLeopard> 'cos if it's required then I'll have to find and build it too. Then re-build dl-fldigi so it knows about it.
[23:21] <fsphil> it's probably compiled in
[23:22] <fsphil> ah, if your building from scratch then you'll probably need the hamlib source
[23:22] <fsphil> unless they have a development package for the mac?
[23:32] <LazyLeopard> Dunno. Going burrowing...
[23:34] <Randomskk> I really wanna get my radio connected to my PC for PTT and audio
[23:35] <Randomskk> I guess just use the DTR pin on the FTDI bob
[23:35] <Randomskk> I should order one specially for this
[23:37] <Randomskk> an ftdi adaptor, miniusb cable, 3.5mm mono jack for the data control, rj45 jack with audio and ptt, and an audio in to go to my pc for
[23:37] <Randomskk> or something along those lines
[23:37] <Randomskk> could put a USB soundcard in it
[23:37] <Randomskk> use that for audio I/O
[23:37] <Randomskk> would be nice
[23:37] <Randomskk> not sure how easy it'd be to set up
[23:38] <fsphil> you can buy kits that do it all
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[23:38] <Randomskk> what's the fun in that
[23:38] <Randomskk> also they are far too expensiver
[23:38] <fsphil> lol
[23:38] <Randomskk> like seriously
[23:38] <fsphil> they're very pricey, for all they are
[23:38] <Randomskk> £50 for a kit that was literally three wires and an ftdi bob
[23:38] <Randomskk> seriously stupid
[23:38] <Randomskk> many hams seem to do amateur electronics totally wrong
[23:39] <Randomskk> end up spending far far too much money in ways that are totally pointless
[23:39] <Randomskk> perhaps not for analogue stuff, admittedly I have no idea there
[23:39] <Randomskk> (though I am pretty confident all those 90 degree traces are not a great idea)
[23:39] <Randomskk> but certainly for things like connecting radios to computers
[23:39] <Randomskk> meh ftdi basically make life super easy
[23:40] <Randomskk> I wonder how good a USB soundcard style thing would work
[23:40] <Randomskk> I bet there's an IC that'd do the trick
[23:40] <Randomskk> heck, an stm32 could
[23:40] <Randomskk> one stm32 could enumerate as a USB-serial plus the PTT control and finally as a USB soundcard with an async pipe for audio in/out of the radio
[23:40] <fsphil> I thought about getting one of the usb avr's, hooking up a decent audio adc
[23:41] <Randomskk> it'd be an stm32, rj45 jack (ptt, audio in), 3.5mm mono jack (control), 3.5mm audio jack (audio out)
[23:41] <Randomskk> easy, cheap, small
[23:41] <Randomskk> take a bit of code, USB stuff is annoying like that
[23:41] <Randomskk> but totally doable for a total parts cost of perhaps £15
[23:42] <fsphil> yea, cat control and adc all in one package
[23:42] <fsphil> single usb cable to the box, whatever else cables to the rig
[23:42] <Randomskk> yea
[23:42] <Randomskk> though perhaps the usb soundcard is pointless
[23:42] <Randomskk> though tbh, fuck it all, just put the rtty decoding on the stm32
[23:42] <Randomskk> give it ethernet
[23:42] <fsphil> lol
[23:43] <Randomskk> I bet it could do a pretty good job of rtty decoding
[23:43] <fsphil> a basic decoder should be pretty simple
[23:43] <Randomskk> then just extract our strings of interest and paste them out the serial or other ethernet to the distributed tracker
[23:44] <fsphil> nice being able to see the spectrum though
[23:44] <Randomskk> true
[23:44] <Randomskk> put a graphical LCD on it :P
[23:44] <fsphil> exp. for frequency drifts
[23:44] <fsphil> esp even
[23:44] <fsphil> you're half way to building your own rig then :)
[23:44] <fsphil> just add a radio!
[23:45] <Randomskk> :P
[23:45] <Randomskk> people here have been looking into that
[23:45] <Randomskk> there are some nice texas instruments chips
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[23:51] <fsphil> ti have a lot of nice chips
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[23:55] fsphil (~phil@2001:470:1f09:483:21f:c6ff:fe44:b25b) left irc: Quit: Zzzzzzzz ... night all!
[00:00] --- Tue Feb 23 2010