highaltitude.log.20120402

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[02:28] <SpeedEvil> http://www.bbc.co.uk/news/uk-scotland-17578739 :(
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[06:30] <number10> morning
[06:30] <daveake> morning
[06:31] <daveake> I've uploaded a better version of Sunday's descent - http://www.youtube.com/watch?v=Tz8RaVXa9us
[06:32] <number10> ah - had not seen the first one - I'll take a look
[06:32] <number10> any still uploaded?
[06:32] <daveake> Only 3 so far http://www.flickr.com/photos/daveake/sets/72157629717191599/
[06:33] <daveake> Will do a load more todat
[06:34] <number10> interesting to see the parachute as buzz hits the trees, the length of line between cloude and the chute must have been long - I wonder if its a good idea to maximise this
[06:35] <daveake> Yes it was pretty long, and yes that helped!
[06:36] <daveake> Where he landed - http://www.nationaltrust.org.uk/holmwood-common/
[06:36] <daveake> "Our common is buzzing with wildlife." -- hahha :)
[06:37] <number10> ha ha
[06:37] <number10> lucky it wasnt the place buzzing with arcraft
[06:37] <daveake> I'm trying to forget about that bit :p
[06:38] <number10> sorry
[06:41] <number10> whens the next launch? :)
[06:41] <eroomde> yo
[06:42] <number10> morning
[06:42] <daveake> Morning Mr Knot :)
[06:43] <eroomde> my new nickname has been duly knoted
[06:44] <daveake> Thanks to your skills the recovery went without a hitch
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[06:44] <number10> your missing out on the puns UpuWork
[06:47] <griffonbot> Received email: James Coxon "[UKHAS] Launches this weekend"
[06:47] <fsphil> knot again
[06:49] <eroomde> thanks daveake, i bow to your opinion
[06:52] <eroomde> upu mentioned my loopy knot would need an online guide - complete mit flashenanimation! http://www.netknots.com/html/figure_eight_knot.html
[06:52] Nick change: soafee-chan -> spacekitteh
[06:53] <daveake> Knotted. I mean noted.
[06:53] <eroomde> and i was backing up the loose end with a single fisherman http://www.netknots.com/html/double_fishermans_knot.html
[06:53] <natrium42> eroomde is mister knot?
[06:54] <natrium42> dully knoted
[06:54] <UpuWork> is spacenear.us loading for anyone else ?
[06:54] <UpuWork> just not loading here
[06:54] <natrium42> loaded here
[06:54] <UpuWork> sticking on waiting for google-analytics
[06:54] <UpuWork> ok ta must be my end
[06:54] <natrium42> wow, many launches
[06:54] <eroomde> UpuWork: was being v slow for me
[06:54] <natrium42> i missed them all :S
[06:54] <daveake> works here
[06:54] <eroomde> coulding log in to kraken for about 5 attempts
[06:55] <natrium42> we need to enable compression
[06:55] <natrium42> let me try to do that
[06:55] <UpuWork> hey daveake
[06:55] <UpuWork> Buzz does have a phone number on it
[06:55] <eroomde> what we do need is a knot that nicely terminates 4 loose ends into a loop
[06:55] <daveake> Oh? Yours? :)
[06:56] <UpuWork> yup
[06:56] <daveake> :D
[06:56] <daveake> On the H2 label?
[06:56] <UpuWork> yep
[06:56] <daveake> :)
[06:56] <UpuWork> if someone is inquisitive
[06:56] <daveake> Not bothered much about the electronics but it would be great to find out why it stopped Txing
[06:57] <daveake> Suspect I didn't jam it in enough, so the tracker bounced around and something broke
[06:57] <x-f> daveake, nice video with the parachute and Ava
[06:57] <UpuWork> its on my spare phone but I'll keep it switched on
[06:57] <daveake> ta
[06:57] <x-f> there's a jet at 21:34, you can hear it and even see the engines
[06:58] <daveake> yep
[06:58] <daveake> UpuWork I uploaded a better version http://www.youtube.com/watch?v=Tz8RaVXa9us
[06:58] <daveake> (this time I ticked the 16 : 9box)
[06:58] <daveake> x-f *see*??
[06:58] <UpuWork> x-f it may have been a few miles away we were just off approach for Gatwick
[06:58] <UpuWork> ~5 miles
[06:58] <UpuWork> too close
[06:59] <daveake> Ah, yes, different one to the one I was thinking of
[06:59] <daveake> Which is during descent in the cloud
[06:59] <number10> do you think buzz may have landed around chichester
[07:00] <x-f> i haven't got that far with Cloud in clouds
[07:01] <UpuWork> that looks better daveake
[07:01] <eroomde> i was in chichester sat night
[07:01] <UpuWork> lol and people wonder why the signal goes alittle wobbly at burst :)
[07:02] <daveake> :D
[07:02] <UpuWork> thx eroomde for knot links
[07:02] <eroomde> np
[07:03] <daveake> Without Ed I think Ava would still be up that tree
[07:03] <natrium42> hmm, looks like gzip was already added to the tracker
[07:03] <natrium42> nice
[07:04] <daveake> http://i.imgur.com/d5Upz.jpg
[07:04] <number10> why is that daveake - some sort of slip knot that enabled you to get it down?
[07:05] <daveake> No, some sort of knot that kept the cord attached to Ava with 2 men (one not exactly lightweightt :p ) pulling down on it
[07:05] <number10> ha I see
[07:05] <daveake> Now if the knot above Ava had been mine it'd have come down a lot quicker
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[07:10] <UpuWork> lol nice picture Dave
[07:11] <UpuWork> the knots held up to some serious punishment
[07:11] <UpuWork> talking of which considering the box was made from foam and gaffer that didn't do too bad either
[07:12] <daveake> Without those, people would be asking "Did you get your payloads down?", and I'd be answering with "I'm a frayed knot"
[07:12] Action: daveake gets coat
[07:13] <daveake> Your box did very well
[07:13] Action: UpuWork ponders
[07:13] <UpuWork> if that had been made from normal polystyrene I don't think it would have held
[07:14] <daveake> Nope
[07:14] <daveake> Good job yours was above mine then
[07:14] <number10> what sort of material did you use UpuWork
[07:14] <UpuWork> they get a serious battering up there on the way down
[07:15] <UpuWork> its that blue house insulation stuff, denser than white polystyrene
[07:15] <UpuWork> but it was baffled inside
[07:15] <UpuWork> https://picasaweb.google.com/118244444241111963790/201203Ava2Build
[07:15] <number10> ta
[07:17] <eroomde> wahey
[07:17] <eroomde> i missed that one daveake
[07:18] <eroomde> not sure it can be topped
[07:18] <daveake> :D
[07:19] <daveake> The Buzz that NASA sent to the ISS is now in the Smithsosonian last week. I've sent them my video as a "video reply" on Youtube :)
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[07:23] <UpuWork> I'll mail Radiometrix this morning
[07:23] <daveake> cool
[07:24] <UpuWork> I'll cc you in
[07:24] <daveake> thanks
[07:24] <UpuWork> ok to hand over rights to pictures ?
[07:24] <daveake> sure
[07:24] <UpuWork> ta
[07:25] <daveake> http://www.youtube.com/watch?v=Fo705Wm_QKs
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[07:25] <daveake> Skip to the 3-minute mark to see the exhibit and the plastic Buzz in the ISS
[07:25] <daveake> Good job I didn't use a plastic one!
[07:26] <UpuWork> yup :) where is the video reply bit ?
[07:26] <daveake> They have to approve it
[07:26] <UpuWork> oh ok
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[07:26] <griffonbot> @AnthonyStirk: Buzz Lightyear Descending From Space: http://t.co/3oSWcIEt better quality! #ukhas [http://twitter.com/AnthonyStirk/status/186716310057664512]
[07:28] <UpuWork> is no one else in the world doing breakouts for MAX6 modules ? I have an order from Japan this mornign
[07:28] <daveake> !!
[07:28] <UpuWork> love to know where they found the shop
[07:29] <fsphil> sweet
[07:31] <number10> google search MAX6 breakout board
[07:31] <UpuWork> ah
[07:31] <UpuWork> that works :)
[07:31] <number10> does indeed
[07:31] <fsphil> hehe, first three results
[07:32] <UpuWork> Wish I could do that with IT Support West Yorkshire!
[07:33] <number10> lol, move to timbuktu
[07:33] <UpuWork> yeah
[07:34] <UpuWork> so quick question to anyone who was listening on Sat, Ava's signal was it strong and clean ?
[07:34] <fsphil> was all lovely and decodable
[07:34] <number10> yes
[07:34] <UpuWork> so only 2 radials works then
[07:35] <Darkside> but use 4 anyway >_>
[07:35] <fsphil> I was quite surprised by how quickly it disappeared from the waterfall after burst
[07:35] <UpuWork> but 2 works Darkside :)
[07:35] <Darkside> UpuWork: your radiation pattern is goign to be non-symmetrical
[07:36] <Darkside> so if it starts spinning, it'll likely fast-fade
[07:36] <UpuWork> 4 is a bugger to store
[07:36] <UpuWork> ok will try 4 next time
[07:36] <UpuWork> it was spinning
[07:36] <fsphil> I tape the four radials to the outside of the box
[07:40] <oh7lzb> http://www.qsl.net/wy3a/Images/Radials.JPG - that's how it really should be done ;)
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[07:42] <number10> I seem to recall pictures of icarus antenna at the end of a short length of coax - so dangling. does rob still do that UpuWork ?
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[07:49] <daveake> My approximated version of that ground plane :-) http://www.daveakerman.com/wp-content/uploads/2011/12/IMG_3365-768x1024.jpg
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[07:54] <UpuWork> yes number10
[07:54] <UpuWork> lol oh7lzb thats a ground plane :)
[07:55] <UpuWork> Rob uses 2 radials
[07:55] <UpuWork> thats where I picked up the bad habit from
[07:55] <UpuWork> mail sent daveake
[07:55] <daveake> :)
[07:55] <number10> well it seemed to work
[07:55] <daveake> I'm sure they'll be delighted
[07:56] <UpuWork> they can be a bit funny sometimes
[07:56] <UpuWork> we'll see
[07:56] <daveake> Well if so, show them your rfm22b order :p
[07:57] <UpuWork> lol
[07:57] <daveake> Ironic that the rfm22b payload stopped Txing after the NTX2s got airborne ...
[08:00] <daveake> nice letter
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[08:05] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] Launches this weekend"
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[08:41] <fsphil> snow warning.. what
[08:41] <UpuWork> yeah read that and was wut
[08:47] <LazyLeopard> the weather's out to make us pay for the summer we've just had.
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[08:53] <daveake> How Ava was rescued ... http://i.imgur.com/PrRWn.jpg
[08:55] <Darkside> haha
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[08:55] Action: daveake Goes off to designed a remote-controlled nichrome cutter ...
[08:56] <fsphil> I had one of those half built, but then thought it might start a fire
[08:56] <daveake> run
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[08:57] <fsphil> in my case it was a fairly big forest and the trees where all incredibly dry. the whole thing would have went up :)
[08:57] <daveake> Fair enough :)
[08:57] Action: Darkside is writing a fun interface to my cutdown
[08:57] <fsphil> I'd also designed a little disk cutter thing, a DC motor with a dremmel bit
[08:57] <fsphil> but the cord kept tangling
[08:57] <Darkside> a serial interface to tune around and send packets
[08:58] <Darkside> so you tune up and down in 1KHz steps until you hear a packet, then send a packet back
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[09:00] <fsphil> how long do you wait to hear a packet?
[09:00] <Darkside> not sure yet :P
[09:00] <Darkside> but it sits inr eceive mode the whole time anyway
[09:00] <Darkside> so it'll find it
[09:00] <Darkside> hear it*
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[09:01] <priyesh> added apex flights to : http://ukhas.org.uk/projects:launch_list
[09:01] <Darkside> should be a good but of fun though
[09:01] <Darkside> might end up making a little box to do it :P
[09:01] <Darkside> so you tune up and down until a green light lights up
[09:01] <Darkside> then ypou press a big red button
[09:02] <Darkside> and BAM. payload cutdown
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[09:05] <daveake> nice
[09:05] <fsphil> big red button with a cover
[09:05] <fsphil> or
[09:05] <fsphil> two keys, that must be turned at the same time
[09:05] <Darkside> other option is you arm it
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[09:05] <Darkside> and it tunes around
[09:05] <Darkside> litens for a downlink packet, then replies automatically
[09:05] <daveake> fsphil lol
[09:06] <daveake> Or a big red phone
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[09:13] <Darkside> navrac: i might have some better uplink code for you in a bit
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[09:15] <navrac> I'm not doing uploads for a while now - althought I'd appreciate seeing the code and what you've done - Im testing technology one flight at a time
[09:15] <navrac> so i'm on solar for the next flight - then balloon pressures thwe following one then fially bringing them all together
[09:15] <Darkside> 431.650 -91
[09:15] Last message repeated 2 time(s).
[09:15] <Darkside> Got Packet with RSSI -91dBm: READY FOR CMD
[09:15] <Darkside> 431.650 -122
[09:15] <Darkside> hahaha
[09:16] Last message repeated 1 time(s).
[09:16] <Darkside> IT WORKS
[09:16] <Darkside> HHAHAHAHAHA
[09:16] <Darkside> YESSSS
[09:16] <navrac> so is this gaussian
[09:16] <fsphil> whoa, you went all mr.burns there
[09:17] <Darkside> navrac: 500 baud GMSK
[09:18] <navrac> All i would say is make it frequency agile - once the balloon gets high there is something on every channel so you have to search for the clearest channel
[09:18] <Darkside> haha
[09:18] <Darkside> navrac: i'm operating on 431.650MHz
[09:18] <Darkside> the experimental section of the amateur band
[09:18] <Darkside> *nobody* uses it
[09:18] <navrac> oh fair enough
[09:19] <navrac> when are you going to try flying it?
[09:20] <Darkside> next launch
[09:20] <Darkside> probably in a week or so
[09:23] <navrac> excellent - well you were getting good ranges at ground level so I would anticipate a pretty good range once its airbourne.
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[09:24] <craag> Is this GMSK for uplink or downlink?
[09:24] <navrac> uplink
[09:25] <craag> Ok cool.
[09:26] <Darkside> both actually
[09:26] <Darkside> it sends a downlink packet for my uplink system to lock onto :-)
[09:27] <craag> r2oxt? was talking about building a replacement for the RTTY system with GMSK.
[09:28] <navrac> trouble is fldigi cant decode rfm speak
[09:29] <SpeedEvil> Ridiculous.
[09:29] <SpeedEvil> They're threatening snow.
[09:29] <kokey> yeah
[09:29] <kokey> tomorrow night
[09:29] <navrac> i know
[09:29] <Darkside> navrac: http://code.google.com/p/project-horus/source/browse/#svn%2Ftrunk%2Fcutdown%2FCode%2FGMSKInteractive
[09:29] <kokey> I did laugh a week ago people thought winter was over
[09:29] <SpeedEvil> http://www.yr.no/place/United_Kingdom/Scotland/Glenrothes/hour_by_hour.html
[09:29] <SpeedEvil> And quite a lot of the damn stuff
[09:29] <kokey> people have a really short term memory when it comes to weather
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[09:33] <gonzo_> root really is your man when it comes to comms datamodes
[09:33] <Darkside> navrac: that code should be drop-innable to your uplink system
[09:33] <navrac> you have been busy darkside
[09:33] <gonzo_> be very interesting to see what he comes up with
[09:33] <Darkside> navrac: yes >_>
[09:34] <Darkside> we're hoping to do a test of this uplink system very soon
[09:35] <navrac> so are you going to do this as just rfm to rfm or record and tx thru a ham rig as well
[09:35] <Darkside> well i want to try both
[09:35] <Darkside> ham rig to RFM is known working
[09:35] <Darkside> already tested that over a long distance, and it works
[09:36] <Darkside> rfm to rfm should work in the car, if we're below the payload
[09:38] <Darkside> navrac: if you make your payload send down regular packets, that code should help for you too
[09:38] <Darkside> the interactive listen mode is so much fun :D
[09:38] <Darkside> its like, tuning, tuning, tuning, tuning..... GOT IT
[09:38] <Darkside> i need to make an 'arm' mode
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[09:40] <navrac> I did have a version which as well as listening did sneak back replies on the rfm channel. But because i wanted it to be open for anyone to use i simplified it so anyone with an rfm could try for a laugh. My testing in spain was all two way as then i didnt need to carry a receiver around with me all day testing
[09:40] <navrac> but in the uk you are not allowed to tx from an airbourne device on those frequencies
[09:43] <gonzo_> in the UK it's possible to TX ham to ham on the ground, and if a HAB 'happens' to hear the TX then that's an unintended quenciquonce. But it's a bit cheeky.
[09:43] <Darkside> around here nobody gives a shit
[09:43] <daveake> "quenciquonce" really should be a word :D
[09:44] <Darkside> and we've been endorsed by the WIA (our equivalent of the RSGB), as we're talking and launching a repeater at their AGM
[09:44] <navrac> oh very cool
[09:44] <Darkside> so we're very much in the 'fuck it, do it anyway' boat
[09:44] <gonzo_> hehe it is for me. And slips in during meetings. Always a pause before people look uop and say 'wot?'
[09:45] <daveake> :)
[09:45] <navrac> morning daveake - a good weekend for you then - you even got to cement your reputation as the tree man
[09:45] <daveake> Yeah, about time I landed in one instead of taking off into one :)
[09:46] <gonzo_> it seems to be going that way here. All our beacon licences have elapsed and the PTT (ofcom) have said that they are toob busy with the olymipcs, and don't care
[09:46] <navrac> multitalented then
[09:46] <daveake> So I've done a tree, the sea, a field and someone's back garden ....
[09:47] <daveake> No pylons yet
[09:47] <gonzo_> that's steve's terratory!
[09:47] <Randomskk> better get a few more launches in :P
[09:47] <daveake> :D
[09:47] <navrac> so i guess on your list you need airports, restricted military areas , substations as well
[09:48] <daveake> Well this weekend's would have a hit an electric line if the tree hadn't jumped in the way first
[09:48] <daveake> Er, yeah, got a bit too close to the first of those
[09:48] <UpuWork> it was very close
[09:48] <UpuWork> infact everything we did this weekend don't do
[09:49] <daveake> :D
[09:49] <navrac> i did like the way with your uplink from the car we could see exactly which tree it was sitting in and could see the chase car approach
[09:49] <UpuWork> oh that reminds me
[09:49] <UpuWork> switch on path on the 2E0UPU_Chase
[09:49] <UpuWork> you can see us going to and from the car
[09:49] <daveake> We got close enough with the in-car direction finding thing that we saw it fly past us
[09:49] <UpuWork> I didn't turn it off and it was in my pocket
[09:49] <daveake> :)
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[09:51] <navrac> excellent
[09:51] <daveake> :)
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[09:52] <navrac> it was a great flight - loved the video and as i said it was great to follow it all the way to a tree and whilst we couldnt see the recovery - being able to look on google maps and look for power lines etc made all us listeners feel really involved - a very good example
[09:52] <daveake> Clearly shows (2 straight lines on the left) where we went initially and saw it flying from
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[09:53] <UpuWork> I could have set the camera up at the recovery site but we had other things to do
[09:53] <navrac> the cam on launch was great
[09:53] <UpuWork> but yes having been a tracker some times the lack of information is annoying
[09:53] <UpuWork> so I like to give as much info as I can video , ground freq etc to the people on here
[09:53] <UpuWork> glad it worked
[09:53] <daveake> navrac That's great. These flights really are a community thing and it's good to keep people informed (in my case I called number10 a few times to keep everyone updated on developments)
[09:54] <navrac> well yours was a great one for that
[09:54] <daveake> It often works the other way with people chipping on where to find a boat and where to eat the best fish and chips :D
[09:54] <navrac> lol
[09:54] <UpuWork> haha
[09:54] <daveake> As I said to UpuWork, this was an unusual chase for me as we did the recovery first and eat after :D
[09:55] <navrac> i must admit im quite fascinated by these short range lightweight camera transmitters they do for remote control aircraft - what would be really cool would be to retransmit live video of the landing via the chase car
[09:56] <daveake> With some launches (no names needed) we don't even know the launch time or dial frequency till a listener happens to find it
[09:56] <navrac> err yeah
[09:57] <daveake> There is so much to do though stuff like that is easily forgotten
[09:57] <daveake> My first was like that
[09:57] <navrac> lots of frustrating sitting around with no info and times slipping....
[09:57] <UpuWork> next time I'll leave the camera running in the car etc
[09:57] <UpuWork> the 3G coverage was exceptional
[09:57] <daveake> yep
[09:57] <daveake> Think I'll add that to my setup too :)
[09:58] <navrac> round here 3g coverage is the exception rather than exceptional
[09:58] <UpuWork> Have you tried Three ?
[09:58] <navrac> once you get north of ipswich, 3g dissapears
[09:59] <navrac> and the gprs has a backlink of <10kbs
[10:00] <navrac> if you stand by the local mast 10kb/s is the max - if two of you stand under the mast it literally halves
[10:00] <navrac> so much for 3g to provide coverage to remote areas
[10:00] <UpuWork> I had great performance around Elsworth too
[10:01] <navrac> quiet day at work today so im going to build ozzie2's aerial and play polysyrene cuting
[10:02] <fsphil> weirdly the only good network at our launch site is Three
[10:02] <fsphil> O2 was crap
[10:02] <navrac> and maybe find a working keyboard
[10:03] <navrac> my company is a small one and i never used to tech support - but for the last few weeks I've stepped in to do it to 'free up the other developers' in reality its because theres not much to do and I get to track flights and build payloads etc
[10:04] <fsphil> any problems reading the laptop screen in the car
[10:04] <fsphil> ?
[10:04] <fsphil> my thinkpad's screen is very bad in sunlight
[10:04] <eroomde> pixel qi!
[10:04] <Darkside> my macbook screen is actually pretty good in sunlight
[10:04] <fsphil> that's the long term plan eroomde :)
[10:04] <fsphil> I don't think they make a screen to fit my thinkpad
[10:05] Action: SpeedEvil is pondering getting a new screen for my thinkpad.
[10:05] <SpeedEvil> I probably shouldn't.
[10:05] <SpeedEvil> Rationally, it's a silly idea.
[10:05] <SpeedEvil> Upgrade from 1024x768 to 1400x1050
[10:05] <fsphil> I'm quite happy with 1024x768
[10:06] <daveake> Looking at the satellite images of where Ava/Cloud landed .... I was wondering, has anyone had their parachute show up after google upload newer imagery?
[10:06] <fsphil> ooh I must check
[10:06] <fsphil> shame hadie:2's chute was black
[10:07] <daveake> black? Sounds a bit sub-optimal!
[10:07] <fsphil> it looked cool :)
[10:07] <UpuWork> black ? Why didn't you paint it green and brown ?
[10:07] <daveake> :)
[10:07] <eroomde> you joke
[10:08] <eroomde> the parachutes esa gave us were olive drab
[10:08] <eroomde> i.e. army standard issue camoflage colour
[10:08] <fsphil> whoops
[10:08] <eroomde> http://www.eng.cam.ac.uk/news/stories/2011/CU_Spaceflight/
[10:08] <Randomskk> obviously that's what you'd use for the real mars landings though
[10:08] <eroomde> take a look at the bottom sequence
[10:09] <SpeedEvil> hah
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[10:09] <eroomde> we tried to compensate with the rest of the payload
[10:10] <eroomde> seeing it in context with a helicopter does rather put the size of it in perspective
[10:10] <eroomde> i still have occassional nightmares about that project
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[10:11] <daveake> Comment from a friend re Buzz's descent "That's not flying; that's falling with style"
[10:11] <Darkside> 21st AIAA Aerodynamic Decelerator Systems Conference
[10:11] <Darkside> a parachute conference?
[10:11] <eroomde> DECELERATORS
[10:11] <eroomde> whoops
[10:11] <eroomde> so not jsut parachutes
[10:12] <Darkside> hehe
[10:13] <eroomde> airbags, hypersonic inflatable blunt body things like hypercones, etc
[10:13] <eroomde> there's quite a lot of research going into it now to take advantage of the no mans land between heat shields and parachutes
[10:13] <eroomde> for better deceleration
[10:13] <eroomde> so sort of mach 5 to mach 1.5
[10:14] <eroomde> eg http://www.nasa.gov/mission_pages/tdm/ldsd/index.html
[10:15] <fsphil> daveake, sounds familiar :)
[10:15] <SpeedEvil> And I imagine inflated heatshields are in tehre somewhere
[10:16] Action: SpeedEvil wonders idly about low-mass high temp parachutes for plutonian aerobraking.
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[10:29] <gonzo_> they should investigate using trees for decent control
[10:29] <SpeedEvil> But that raises the problem of how you land the trees.
[10:30] <navrac> previous mission you just through down a lot of seeds
[10:30] <gonzo_> just leave them up there. At least the foliage will cover a bit of the hole in the ozone
[10:30] <daveake> Or same mission, then orbit for 30 years
[10:30] <navrac> then come back a few years later - use a balloon and it will head straight for the nearest tree
[10:31] <daveake> or ocean
[10:31] <daveake> or power line
[10:31] <navrac> leylandi grow fast
[10:31] <navrac> add miracle grow and you are sorted
[10:32] <gonzo_> just wait till xmas, buy up lots and make a big catrapult
[10:32] <daveake> lol
[10:32] <daveake> Reminds me of my plan to rescue PicoBuzz from that tree
[10:33] <gonzo_> if you were to attach a sappling to a HAB, would that null out the localised tree-field and stip it being attracted to land based trees?
[10:33] <gonzo_> I am still of the mind that a 12bore if a good cutdown device
[10:34] <daveake> :)
[10:34] <daveake> Photos from the launch and recovery on Saturday http://www.flickr.com/photos/daveake/sets/72157629717191599/
[10:34] <gonzo_> (reload your shells with bits of wire, with fishing split shot crimped along. That would cut the like!)
[10:34] <gonzo_> line
[10:35] <UpuWork> ping Darkside fsphil NigelMoby
[10:35] <UpuWork> i.imgur.com/0ACkJ.jpg
[10:35] <UpuWork> http://i.imgur.com/0ACkJ.jpg
[10:35] <UpuWork> even
[10:35] <UpuWork> http://i.imgur.com/sQn8P.jpg
[10:36] <Randomskk> oh
[10:36] <Randomskk> that looks cool
[10:36] <UpuWork> can have one if you want
[10:37] <Randomskk> not doing any 2m payloads :P
[10:37] <navrac> big tree
[10:37] <UpuWork> :)
[10:37] <UpuWork> guess I'll have to do a Farnell order now
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[10:38] <Darkside> UpuWork: cool :-)
[10:38] <navrac> just awaiting my deliveries - i'm running out of things to build
[10:38] <UpuWork> look good Darkside and an very quick turn around from Seeed
[10:39] <UpuWork> lol
[10:39] <Randomskk> what was the total time order->delivery?
[10:40] <UpuWork> http://www.flickr.com/photos/daveake/6892064294/in/set-72157629717191599/ check our improvised "cut down" mechanism
[10:40] <Randomskk> :D
[10:41] <gonzo_> now I like that!
[10:43] <eroomde> that poor knot!
[10:44] <daveake> Be a frayed
[10:44] <Randomskk> oh nice
[10:44] <Randomskk> I was going to go for like "knot a great day for it" but decided that was rubbish
[10:45] <daveake> :D
[10:45] <daveake> I've already done the "recovery went without a hitch" one
[10:46] <eroomde> take a bow
[10:46] <daveake> ah a new one :)
[10:46] <gonzo_> I declare that t6his play on words results in a tie
[10:46] <daveake> We're just going in a loop
[10:47] <gonzo_> (not that I want to string things along)
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[10:47] <daveake> You've got me in stitches
[10:47] <Randomskk> you're getting your puns all tangled up
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[10:47] <daveake> One starts then it's a chain
[10:47] <gonzo_> we are just bow-lin along
[10:48] <gonzo_> or have we hit a reef?
[10:48] <gonzo_> (The mind boggles how I'm going to get 'sheep bend' into this?!!!)
[10:48] <daveake> we'll slip soon
[10:49] <Randomskk> we're cruising at at least 1.151mph here gonzo_ :P
[10:49] <gonzo_> this is starting to a-braid
[10:49] <daveake> Ed taut Upu and I how to tie decent knots
[10:49] <gonzo_> ok I give in
[10:49] <daveake> :)
[10:49] <gonzo_> before it becomes a bind
[10:51] <daveake> You'll keep on till the bitter end
[10:51] <gonzo_> nope, I've had enough of this thread!
[10:51] <Randomskk> I plan on doing doing a round turn long before we reach the end of our tether
[10:52] <daveake> I'm in accord
[10:55] <eroomde> FIN
[10:56] <UpuWork> +1
[10:56] <daveake> Any launches this week? I want to try out my funcube on a flight
[10:56] <fsphil> aaw, I just got back :p
[10:57] <eroomde> i'm off to francophone for a bit from wed
[10:57] <eroomde> so now AELing until 13th at least
[11:03] <cuddykid> daveake: don't mind doing a joint launch& I have a working pico tracker
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[11:04] <daveake> They're a good way to split the costs and I think add to the experience overall
[11:04] <Darkside> hahahaha
[11:04] <cuddykid> yeah, that's what I was thinking with the price of balloon + helium etc, going 1/2s does make it a lot more affordable :P
[11:05] <Darkside> just had a working cutdown test!
[11:05] <cuddykid> nice
[11:05] <daveake> helium? pah! that's so 2011 .... :p
[11:05] <cuddykid> lol
[11:05] <cuddykid> you on hydrogen now?
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[11:05] <daveake> It'd explain the lack of brainpower this morning
[11:06] <Laurenceb> cuddkid: you in notts atm?
[11:06] <daveake> Er, yeah, the 2 launches on Saturday were H2
[11:06] <cuddykid> Laurenceb: back in worcs
[11:06] <Laurenceb> ah
[11:06] <Laurenceb> i was going to say i could help you with soldering
[11:06] <cuddykid> daveake: oh cool, is it a significant amount cheaper?
[11:06] <daveake> oh yus
[11:06] <Laurenceb> daveake: nice, now we need to try for an altitude record
[11:06] <cuddykid> Laurenceb: ahh yes, that would've been great as I've made a complete mess! haha thanks :)
[11:06] <daveake> Already did try :(
[11:07] <daveake> 27km
[11:07] <Laurenceb> oops
[11:07] <cuddykid> :/
[11:07] <Laurenceb> howyee?
[11:07] <Darkside> haha
[11:07] <Darkside> that makes a great video
[11:07] <Darkside> i'll upload it to youtube
[11:07] <daveake> brb
[11:08] #highaltitude: mode change '+o jonsowman' by ChanServ!ChanServ@services.
[11:08] Topic changed on #highaltitude by jonsowman!jonsowman@kryten.hexoc.com: Welcome to #highaltitude - discuss anything to do with high altitude projects (balloons, gliders, etc) www.ukhas.org.uk
[11:08] #highaltitude: mode change '-o jonsowman' by ChanServ!ChanServ@services.
[11:09] <Randomskk> you can /chanserv topic iirc
[11:09] <jonsowman> yes but i'd rather it displays who changed it
[11:10] <Randomskk> fair enough
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[11:22] <gonzo_> (topic: dave and jules are banned from protracted word plays)
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[11:24] <daveake> Laurenceb 1600 Hwoyee. Was hoping for rather more than 27km. They do seem a bit variable.
[11:24] <Laurenceb> yeah
[11:24] <Laurenceb> i think the different sizes use different thinkness latex
[11:24] <Laurenceb> i worked this out a while back by looking at peoples flight results
[11:25] <Laurenceb> cant remember what looked best sorry
[11:25] <daveake> The second flight - Ava/Cloud - also used a 1660 Hwoyee, 2 years old, had 3 times the neck lift yet managed over 38km
[11:25] <Laurenceb> i.e. its not just the size that changes with the envelope mass
[11:26] <daveake> My Buzz1 and 2 flights used the same make/size of balloon, and had about the same neck lift as the Buzz4 one this weekend
[11:26] <navrac> how far below the balloon was buzz?
[11:27] <daveake> Then there's Steve last 2 flights with similar payload weights, same size balloon, same gas as Buzz4, and reached IIRC similar altitudes
[11:27] <daveake> That's a question for eroomde as he measured it :D
[11:28] Action: daveake finds someone to blame :p
[11:28] <daveake> 10m roughly
[11:28] <navrac> i just wonder with such a light payload if it could swing around and burst itself on the radials?
[11:28] <navrac> ah unlikely then
[11:28] <daveake> Possible I guess
[11:28] <daveake> But yes unlikely
[11:29] <daveake> radials were protected with straws
[11:29] <navrac> rate of ascent were similar werent they - so there had to be less gas in buzz
[11:30] <navrac> naff batch of balloons?
[11:30] <navrac> if ava was an old one and buzz and steves were new oes
[11:30] <daveake> Yes, lot less gas for Buzz
[11:31] <daveake> 1.2kg vs 3.2kg lift on my sheets. And Upu overfilled (I don't know how much) so that 3.2 may have been 3.5-ish
[11:31] <daveake> Well, I do wonder if Chinese QA is a bit loose, so we get good ones and poor ones
[11:32] <daveake> Which if true at least means my record is safe for a while :D
[11:32] <navrac> im going to hunt down a mylar sealing factory - theres got ot be one somewhere I want a 2m mylar
[11:33] <navrac> or a 2m circle of ply with nichrome wire and some sort of heat control and a sleeve round it
[11:34] <navrac> then i could have double seams as well
[11:35] <daveake> Just had an idea .....
[11:35] <navrac> should we be worried?
[11:35] <daveake> .... fill my last foil balloon ... attach a hook and nylon string ... let it up to the top of that damn tree then hook PicoBuzz and pull him down :)
[11:36] <daveake> Need a very still day!
[11:36] <eroomde> quadcopter with first person view and a blowtorch
[11:36] <daveake> I have some helis but I'd just decorate the tree with them
[11:37] <navrac> yep - ive got a nice heli graveyard in my back garden
[11:38] <navrac> bits fall down occasionaly
[11:38] <cuddykid> lol
[11:38] <navrac> sadly the dont fly when its windy rule doesnt seem to register after ive been drinking
[11:38] <daveake> :D
[11:39] <navrac> everything soundly like a good idea after sunday lunch at the pub
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[11:41] <daveake> Should be able to get enough lift for an AA and piece of nichrome
[11:45] <navrac> sadly my copter flying isnt up to those standards - it goes up - i fiddle about and it goes where it wants
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[12:07] <UpuWork> I'd estimate the over fill was no more than 250g
[12:07] <UpuWork> it only just lifted the filling pipe
[12:08] <jcoxon> afternoon
[12:09] <UpuWork> afternoon jcoxon
[12:09] <daveake> UpuWork ta
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[12:10] <jcoxon> h2 ain't easy
[12:10] <jcoxon> to get right to go high
[12:10] <UpuWork> I think its the balloon personally
[12:10] <jcoxon> could be
[12:11] <daveake> I do
[12:11] <UpuWork> 3 misses all with same flight characteristics
[12:11] <jcoxon> indeed
[12:11] <jcoxon> or that the same rules don't apply
[12:11] <daveake> 2 balloons launched within an hour or so, one (old) balloon with near 3 times the neck lift yet went higher
[12:11] <UpuWork> Unless the weight helps it not burst
[12:11] <UpuWork> which would sound a bit cockeyed
[12:11] <daveake> It would!
[12:12] <UpuWork> I think I just made a word
[12:12] <daveake> Buzz2 has same necklift, He not H2, 150g payload/chute vs 65g, yet went to 41km not 27
[12:13] <jonsowman> intuition says balloons
[12:13] <daveake> Mine too
[12:13] <UpuWork> all the current records were set with the first batch of balloons
[12:13] <daveake> Especially since Steve had similar poor altitudes recently with his attempts
[12:13] <UpuWork> I think
[12:14] <daveake> So minus side- can't beat the Americans yet; plus side - Buzz2 is probably safe for a while :)
[12:14] Action: fsphil has a first batch balloon :p
[12:15] <daveake> Name your price :D
[12:15] <UpuWork> 1600g ?
[12:15] <fsphil> lol
[12:15] <fsphil> yea
[12:15] <UpuWork> just 1 ?
[12:15] <fsphil> just the 1
[12:15] <UpuWork> don't float it pls :) lets fill it with h2 and get the record
[12:15] <daveake> I knew I should have stocked up on 1600g Hwoyees, petrol and 1st class stamps
[12:16] <UpuWork> I'll give you a litre of petrol, 2 greggs pasties and a book of first class stamps for it
[12:16] <jonsowman> bargain
[12:16] <UpuWork> and if they decide to tax breast implants I'll get you some of those too
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[12:16] <Randomskk> <:/
[12:17] <Laurenceb> we need to make our own balloons
[12:17] <Randomskk> yea basically
[12:17] <Randomskk> but wow, faff
[12:17] <Randomskk> so much faff
[12:17] <Laurenceb> its not _that_ hard to make latex ones
[12:17] <Laurenceb> at least they are small
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[12:17] <Randomskk> hard to get quality control anything like as good as totex or even hwoyee probably
[12:18] <Laurenceb> then we could experiment small scale with different latex mixtures
[12:18] <daveake> balloons? or fsphil's pre-augmentation breasts?
[12:18] <Laurenceb> lol
[12:18] <UpuWork> lol
[12:18] <jonsowman> concerning
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[12:22] Action: fsphil ponders
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[12:25] <daveake> UpuWork / eroomde Any idea what Greg was worried about here? http://i.imgur.com/XP4Ly.jpg :)
[12:25] <UpuWork> lol
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[12:26] <UpuWork> £44.98
[12:27] <daveake> Nice shot http://i.imgur.com/hzNUj.jpg
[12:27] <UpuWork> wrong window
[12:32] <eroomde> is this blue for anyone else? http://www.youtube.com/watch?v=poFFNNtU5sM&feature=related
[12:32] <eroomde> all my ty videos seem to have a blue tint atm
[12:32] <UpuWork> looks ok here
[12:32] <eroomde> off
[12:33] <eroomde> odd*
[12:33] <daveake> COlours look fine here
[12:33] <eroomde> i'll try restarting
[12:33] <daveake> Adjusted by an old person? (yellowing eyes)
[12:33] <eroomde> i just got a dvd about carlos kleiber (the conductor) in the post
[12:33] <eroomde> am excited
[12:33] <eroomde> guy was one of the few people in the last 30 years worth of a genius moniker
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[12:42] <Darkside> ooooh
[12:42] <Darkside> i had an interesting failure mode on my payload
[12:42] <Darkside> it would lock up
[12:42] <Darkside> yay watchdog
[12:42] <Darkside> watchdog fixes the symptom, now to find the cause
[12:43] <fsphil> mortals would consider the watchdog the solution :)
[12:43] <Darkside> i don't
[12:43] <Darkside> i want to find out why my code hangs when i activate the cutdown for 4 seconds...
[12:43] <daveake> insufficient power?
[12:44] <Darkside> nope
[12:44] <Darkside> 3.3v rail only sags to 3.2v
[12:44] <Darkside> thats fine
[12:44] <daveake> does it fail if you disconnect the cutdown?
[12:44] <Darkside> you know
[12:44] <Darkside> thats a good point
[12:44] <Darkside> lets find out!
[12:44] <daveake> It'd tell you which way to go next :)
[12:45] <Darkside> hmm i need to add a 500hz shift option to my interactive transmitter
[12:45] <Darkside> ok
[12:45] <Darkside> yeah
[12:45] <Darkside> it doesn't die with the cutdownd isconnecter
[12:47] <WillDuckworth> hey cuddykid, if you're around: - any NOTAMs booked?
[12:47] <eroomde> are you def sure they voltage doesn't sag lower than 3.3V?
[12:47] <cuddykid> Hi Will!
[12:47] <eroomde> do you have a ballast resistor is series with the cutdown?
[12:47] <daveake> ^^ good question. What type of cutdown?
[12:48] <cuddykid> WillDuckworth: I was going to ask you the same thing! haha - I contacted David Miller a while back now requesting easter permission however I've heard nothing back.. will chase him up
[12:48] <Darkside> eroomde: it sags to 3.2
[12:48] <Darkside> and i'm pretty sure the problem is due to brownout detection
[12:48] <Darkside> or lack therof
[12:48] <cuddykid> WillDuckworth: I've got a month off now and a working pico tracker (really tiny!) - if you want to do a joint launch I'd be more than happy to!
[12:48] <Darkside> eroomde: and no! no ballast resistor :P
[12:49] <Darkside> i think i can fix this problem by playing with the brownout detector settings
[12:49] <Randomskk> Darkside: how big is the capacitor on the cutdown?
[12:49] <WillDuckworth> cool cuddykid - keeping a weather-eye open - yeah - glad to help out, got a cylinder of helium i don't think i'll use all of it - plus a 500 or 600 balloon
[12:49] <Darkside> Randomskk:
[12:49] <Randomskk> and, how are you measuring what voltage it drops to?
[12:49] <Darkside> yeeeeeeah
[12:50] <Darkside> i'm using 4 AA batteries here
[12:50] <cuddykid> ahh ok - I might look into a pico balloon :)
[12:50] <Darkside> the voltage across the batteries drops to 4.2V
[12:50] <Darkside> output of the LDO drops to 3.2v
[12:50] <Randomskk> you're poewring the cutdown from the LDO?
[12:50] <Darkside> i'm using a... multimeter
[12:50] <Darkside> no
[12:50] <Randomskk> you should use a scope
[12:50] <Darkside> the cutdown is powered from the batteires directly
[12:50] <Darkside> yeah
[12:50] <Randomskk> the DMM will probably miss transients
[12:50] <Darkside> i think i will
[12:50] <Randomskk> you should put a big capacitor on it
[12:50] <Randomskk> like, in the milliFarad range
[12:51] <Randomskk> and then you should put a ballast resistor on
[12:51] <Randomskk> :P
[12:51] <Darkside> to limit the current you mean?
[12:51] <Randomskk> to set the current
[12:51] <Darkside> yah ok
[12:51] <Darkside> hrmm
[12:51] <Darkside> as the nichrome wire gets hotter, the resistance lowers...
[12:51] <Darkside> ahhhhhhhhhh
[12:51] <Randomskk> lowers?
[12:51] <Darkside> it gets to a thermal runaway point
[12:51] <Randomskk> are you sure about that?
[12:51] <Darkside> wait, doesn't it?
[12:52] <Darkside> not sure
[12:52] <Randomskk> it's NTC?
[12:52] <Darkside> yeah probably not
[12:52] <Randomskk> most things have more resistance as they get hotter
[12:52] <Darkside> i'm just thinking thermal runaway
[12:52] <Randomskk> I think it's just a big transient
[12:52] <Darkside> but i guess not
[12:52] <daveake> doubt it
[12:52] <Darkside> ok
[12:52] <Randomskk> and you should scope the voltage
[12:52] <Darkside> yep
[12:52] <Darkside> ok
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[12:52] <Darkside> will do
[12:52] <Randomskk> (and then put a big capacitor on to solve the problem :P)
[12:52] <daveake> Yeah, scope. DMM too slow
[12:52] <Darkside> i could just put a big cap on the batteries, right?
[12:53] <Darkside> well, probably attched to the power connector on th eboard
[12:53] <Randomskk> Darkside: how do you connect to the nichrome?
[12:53] <Randomskk> I'd consider putting the cap on the connector rather than the batteries
[12:53] <Darkside> that won't work
[12:53] <Darkside> it'll have no voltage across the cap
[12:53] <Randomskk> oh yea
[12:53] <Randomskk> ofc
[12:53] <Darkside> so it has to be on the batteries
[12:53] <Randomskk> well then the battery connector is probably the best you can do atm
[12:53] <Darkside> ok
[12:54] <Darkside> and fix the brownout detection
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[12:54] <Darkside> because this chip should run down to 1.8v
[12:54] <Darkside> as should the radio
[12:54] <Randomskk> yea but massive transients is different to stable operating voltages
[12:54] <Randomskk> you want to fix the brownout, not the detection
[12:54] <Darkside> mm
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[13:08] <gonzo_> and be caueful of the state that IO lines come up in when booted
[13:08] <Darkside> it won't trigger the fet
[13:08] <Darkside> they are pulled down
[13:09] <gonzo_> That's good. Have been caught out that way before
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[13:15] <schofieldau> long time no IRsee
[13:16] <Darkside> ohi
[13:16] <schofieldau> 'sup
[13:17] <Darkside> just working on this cutdown
[13:17] <schofieldau> hotwire?
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[13:17] <Darkside> yer
[13:19] <schofieldau> nice
[13:19] <schofieldau> was this inspired by the last launch?
[13:19] <Darkside> yeah...
[13:19] <schofieldau> so how do you send it the cutdown signal?
[13:19] <Darkside> magic
[13:19] <Darkside> (radio)
[13:20] <schofieldau> FM?
[13:20] <Darkside> naw, sending up GMSK
[13:21] <Laurenceb> called FM
[13:21] <Darkside> yeeeeah it is frequency modulation :P
[13:21] Action: schofieldau wikipedias
[13:22] <Darkside> just not the FM i mean when i saw FM
[13:23] <schofieldau> wait GMSK as in a cell phone?
[13:23] <Darkside> no
[13:23] <Randomskk> you may be thinking of GSM
[13:23] <Randomskk> but I think GSM does do GMSK
[13:23] <Randomskk> so yes, that.
[13:23] <Darkside> 500 baud GMSK, as transmitted by a RFM22B transceiver module
[13:24] <schofieldau> yeah GSM uses GMSK
[13:24] <schofieldau> and ah okay
[13:26] <Darkside> damn i should go to bed..
[13:26] <Darkside> been a busy day
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[13:41] <NigeyS> ping Laurenceb
[13:41] <Laurenceb> sup
[13:41] <NigeyS> http://wiki.spench.net/wiki/Gr-baz#rtl_source_c
[13:41] <NigeyS> progress..
[13:42] <Laurenceb> now if only i had a dongle
[13:42] <Laurenceb> dealextreme sell them?
[13:42] <NigeyS> woah its still not turned up ?
[13:44] <Laurenceb> nope
[13:44] <Laurenceb> i dont trust them
[13:45] <NigeyS> gits
[13:45] <NigeyS> see pm :-)
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[13:47] <Darkside> support for the tuner in my dongle was added recently too
[13:48] <Darkside> will have to test it out
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[13:48] <NigeyS> yeah i just saw that, should be interesting
[13:50] <Laurenceb> its been slashdotted :P
[13:53] <Laurenceb> http://static.rcgroups.net/forums/attachments/3/2/4/0/5/7/a4718694-84-DSCN7497.jpg
[13:53] <Laurenceb> ill just leave that here
[13:54] <r2x0t> pcb from hell?
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[13:54] <Laurenceb> looks like it
[13:55] <Randomskk> some ace soldering there
[13:55] <UpuWork> what happened to that ?
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[13:55] <r2x0t> it looks like it was corroded, like from leaked batteries or something
[13:55] <Randomskk> or from far too much flux and way too hot a reflow process...
[14:01] <eroomde> i love that
[14:01] <eroomde> someone has some completely munged gooey brown horrible pcb
[14:01] <eroomde> 10 mins in an ultrasonic cleaner full of IPA and it gleams
[14:01] <eroomde> although the ultrasound has probably killed anything vaguely ceramic
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[14:06] <Laurenceb> ive got a fibreglass brush pen thingy that works well
[14:08] <UpuWork> I need to get one of those
[14:09] <Darkside> i just use IPA and lint-free wipes
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[14:15] <Laurenceb> just been soldering stainless steel parts with acid plumbing flux
[14:15] <Laurenceb> that makes a mess
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[14:40] <daveake> Photos from Saturdays flights - http://www.flickr.com/photos/daveake/sets/72157629717191599/
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[14:48] <WillDuckworth> nice daveake - glad you got Upu working...
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[14:50] <daveake> Is that a first? :p
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[14:50] Action: UpuWork raises an eye brow
[14:50] <daveake> raising eyebrows doesn't count as work :)
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[14:54] <WillDuckworth> liked the timelapse vid :)
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[15:13] <Randomskk> talking of accurate clocks
[15:13] <Randomskk> http://leapsecond.com/pages/atomic-nixie/
[15:15] <Laurenceb> is there a reason NULL would break my stm32?
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[15:17] <Randomskk> Laurenceb: NULL where?
[15:17] <Randomskk> in the right place I'm sure it'd make it sad
[15:17] <Randomskk> like say the reset vector
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[15:19] <Laurenceb> i tried to send some data to NULL
[15:20] <Laurenceb> so passed NULL as a pointer to a function that passes back a uint32
[15:20] <Laurenceb> it causes hardfault
[15:20] <Randomskk> you tried to write to memory address 0?
[15:21] <Randomskk> or you just created a null pointer? or what?
[15:21] <Laurenceb> hmm good question
[15:21] <Laurenceb> i just passed NULL as the arguments
[15:21] <Randomskk> if the function wrote to NULL that would hardfault it
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[15:24] <Laurenceb> why?
[15:24] <Randomskk> writing to null makes it sad
[15:24] <Laurenceb> yeah looks like null is 0x00000000
[15:24] <Laurenceb> i see
[15:24] <Randomskk> well NULL==0
[15:24] <Randomskk> it's an MMU fault
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[15:24] <Laurenceb> i see
[15:25] <Randomskk> that's not a writable memory address
[15:25] <Randomskk> I'm surprised it's a hardfault rather than a memoryfault
[15:25] <Randomskk> but I guess there's no memoryfault
[15:25] <Laurenceb> well i dont know
[15:25] <Laurenceb> my linker script is a mess
[15:25] <Randomskk> heh
[15:25] <Randomskk> at any rate you can't write to 0x0
[15:25] <Laurenceb> everything is reseveredexception9
[15:25] <Randomskk> nice
[15:25] <Laurenceb> -all the errors are
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[15:30] <Laurenceb> trying to do controls with a single button
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[15:30] <Laurenceb> you press it multiple times in a row for different commands
[15:30] <Randomskk> sounds intuitive
[15:31] <Laurenceb> atm i have rising edge interrupt, which loops for a while to debounce, then waits for the pin to go low with a timeout of 500ms
[15:32] <Laurenceb> if it times out it runs the device off, if it gets falling edge it places the system time in a buffer
[15:32] <Laurenceb> - uint32 milliseconds
[15:32] <Laurenceb> the thing is it involves waiting inside an interrupt
[15:33] <Laurenceb> i guess the really pro way would be to use a timer
[15:33] <r2x0t> yes, long time spent in int causes problems
[15:33] <Laurenceb> depends, atm its only under at power on and off
[15:34] <r2x0t> timer is much better solution
[15:34] <Laurenceb> yeah
[15:34] <r2x0t> in the INT just set some flag, then check if button is still pressed/depressed in timer
[15:34] <Laurenceb> yeah thats one way
[15:35] <Laurenceb> i was thinking input capture
[15:35] <Laurenceb> but just a timer delay is simpler
[15:35] <r2x0t> or that, depends if you can have timer that can be used just for this
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[15:53] <Laurenceb> internet: giving you pitch yaw and troll
[15:53] <kokey> heh
[15:55] <zyp> nice joke bro
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[15:59] <kokey> oh this looks quite interesting...
[15:59] <kokey> http://sdr.osmocom.org/trac/wiki/rtl-sdr
[15:59] <kokey> DVB-T sticks based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples to the host
[16:00] <Laurenceb> yeah
[16:00] <Laurenceb> it was slashdotted :P
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[16:02] <Laurenceb> oh theres a simpler way to do buttons
[16:02] <Laurenceb> read out the gpio from systick
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[16:13] <number10> ah - more photos daveake, I didnt realise you taped some stuff to the outside of cloud
[16:14] <daveake> Yeah, that was Upu's little video cam that spent a night floating in the North Sea :)
[16:15] <number10> did it run?
[16:16] <daveake> Believe it stopped when it got too cold
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[16:53] <Upu> number10 the video was fine and if we'd insulated it we would have got some great footage : http://i.imgur.com/ovJi3.png
[16:53] <Upu> it was a bit last minute
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[16:55] <number10> how long did it work for Upu ?
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[17:02] <Upu> an hour
[17:02] <Upu> until it got to -32'C :)
[17:02] <chris_99> can anyone recommend a chip similar to the NTX2 but a lot higher power
[17:02] <Upu> but 30 mins in the air
[17:02] <chris_99> for use on the ground
[17:03] <Upu> NTX2HP
[17:03] <Upu> 70cms ?
[17:03] <chris_99> i'm easy with the frequency tbh
[17:03] <chris_99> hmm 25mW may not be enough
[17:03] <Upu> hx1 is 300mW @ 2 meters
[17:03] <Upu> what for ?
[17:04] <chris_99> basically i've been asked to make a system that uses RTTY with a GPS to keep track of the location with a distance of around 2 miles
[17:04] <chris_99> from the transmitter to reciever
[17:04] <jonsowman> use APRS?
[17:05] <jonsowman> depends where you're using it
[17:05] <chris_99> i don't know anything about APRS but does that require you need a licence
[17:05] <jonsowman> any amateur band operation requires a license
[17:05] <jonsowman> the exception is the ISM bands
[17:06] <chris_99> the RTTY NTX2 things don't though do they
[17:06] <nigelvh> When using low power.
[17:06] <jonsowman> those are 10mW and therefore LPD433 compliant
[17:06] <chris_99> 433MHz is unlicenced right?
[17:06] <jonsowman> it's license-exempt
[17:06] <jonsowman> not quite the same thing
[17:06] <nigelvh> when using low power.
[17:07] <jonsowman> yes, that ^
[17:07] <chris_99> what do they class as low power
[17:07] <jonsowman> 10mW (ERP i think?)
[17:07] <chris_99> theres always a catch isn't there :(
[17:07] <nigelvh> Get above that and you need a license
[17:07] <jonsowman> below 434.04 is 1mW
[17:07] <jonsowman> or 10mW w/ 10% duty
[17:07] <jonsowman> chris_99: read IR2030
[17:08] <jonsowman> i may be wrong on the above. it's correct for airborne use, but may be different for ground
[17:08] <jonsowman> IR2030 will clarify/confirm
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[17:09] <nigelvh> To summarize, on certain frequency ranges, below certain power levels, license exempt use is allowed. Outside of those given limits licenses are required. The regs are your "friend"
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[17:15] <G0DJA> chris_99 depending on who it's for you can apply for experimental licence for certain bands but there are restrictions and only on certain frequencies
[17:16] <chris_99> cheers i'll look into that, it's actually for my friend who's in the cadets
[17:16] <chris_99> they do the duke of edinbourough (forgive my spelling) award
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[17:16] <chris_99> and he wanted to keep track of the different groups
[17:16] <jonsowman> SPoT?
[17:18] <chris_99> ?
[17:18] <r2x0t> Spot = satellite tracking service
[17:18] <jonsowman> i should be more verbose
[17:18] <jonsowman> chris_99: http://international.findmespot.com/
[17:19] <jonsowman> http://www.findmespot.eu/en/index.php?cid=102
[17:19] <jonsowman> they're not particularly cheap but they Just Work for what you want
[17:19] <jonsowman> waterproof, self contained, etc
[17:20] <r2x0t> may be cheaper then building something similar yourself + all the receiving equipment
[17:20] <chris_99> cheers, i'll look into that
[17:20] <chris_99> i guess that may be too expensive though
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[17:21] <r2x0t> http://www.findmespot.eu/en/index.php?cid=103
[17:22] <r2x0t> 99e/year really isn't that bad
[17:23] <jonsowman> that's like, what, £99? :P
[17:23] Nick change: jasonb_ -> jasonb
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[17:32] <Upu> number10 http://www.youtube.com/watch?v=exQiMNsbR6k not a very interesting video tbh
[17:32] <number10> ta
[17:33] <Upu> but shows how much the payloads get thrown about on the way up
[17:33] <Upu> scroll to end to see what -32'C does to a key chain camera :)
[17:33] <Upu> sound is borked due to salt water :)
[17:34] <number10> ok, will do
[17:34] <Upu> should have insulated it really would have made a great burst video
[17:34] <daveake> Next time :)
[17:35] <jonsowman> Upu: daveake: can tracker be cleared?
[17:35] <Upu> can for me
[17:35] <daveake> sure
[17:35] <Upu> we got a launch ?
[17:35] <jonsowman> thanks
[17:35] <fsphil> who's next up?
[17:35] <jonsowman> nope, just priyesh testing a new chase car app :)
[17:35] <Upu> ok
[17:37] <daveake> 2 jets around the 11 minutee mark
[17:37] <Upu> yeah there is more as it goes up
[17:37] <nigelvh> Yeah, it's a shame the video didn't keep going. A burst video would be great.
[17:37] <Upu> nothing close though
[17:37] <daveake> nope :)
[17:37] <Upu> from that angle would have been great
[17:40] <number10> between Ava and balloon is a label?
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[17:40] <number10> must be parachute - brain has gone
[17:41] <daveake> :D
[17:41] <daveake> I was wondering just how sharp your eyes were!
[17:41] <daveake> There was a label - H2 warning
[17:41] <number10> glasses downstairs ;)
[17:43] <Upu> you can see that ?
[17:43] <number10> nice as it comes ou of the clouds
[17:43] <number10> No Upu, I left my glases downstairs
[17:43] <Upu> ok :)
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[18:39] <chris_99> anyone used one of these per chance http://www.radiometrix.com/shx1-0 ?
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[18:41] <Elmar_PD3EM> chris_99: no, but might be nice for 144.800 APRS
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[18:42] <jonsowman> you'd need a license for 144.8 chris_99
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[18:43] <Elmar_PD3EM> that's true jonsowman and not allowed in the UK on a HAB. But allowed in some other countries for hams
[18:43] <jonsowman> Elmar_PD3EM: yeah. chris_99 was asking earlier about license-exempt ground-based tracking solutions
[18:43] <jonsowman> hence my mentioning the license requirement :)
[18:44] <Elmar_PD3EM> ;-) I just logged in and missed chris_99 earlier Qs
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[18:47] <chris_99> oh darn :(
[18:47] <chris_99> better look again
[18:48] <priyesh> clearing tracker if that's okay
[18:48] <daveake> yep
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[19:54] <navrac_> is anu going to be launching soon?
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[19:56] <Morseman> Got timed out I guess
[19:56] <Morseman> On the FT817 dial set 144.489.00 and in "DIG" set USER-U with no offset
[19:57] <Morseman> Then in WSPR double click in the blue area to set that as your TX frequency - WSPR works out the rest for you
[19:58] <number10> navrac_: Anu not so soon was testing another board.
[19:58] <Morseman> With dial at 144,489 the "500" in the middle is 144.490.500 for TX freq
[19:58] <navrac_> oh fair enough. was just checking there are no conficts with ozzie2 on sunday
[19:58] <Morseman> Sorry - wrong chat room!
[19:59] <navrac_> no problem - i often dont understand whats being said in here
[20:00] <number10> navrac_: I have made two .075 and .650, and would anounce before
[20:01] <navrac_> I think i'll stick with 0.2 which seems to be the defacto standard for rfm's - I'm just keeping an eye out in case we get a busy day
[20:01] <navrac_> after last week which seemed to be a bit busy I thought it best to be alert
[20:03] <number10> you anounced yours over a week back navrac_ so no one should be launching over your frequency.
[20:03] <number10> well we would hope not!
[20:04] <navrac_> hmm - well one would hope
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[20:10] <Elmar_PD3EM> I've used two variable resistors in my test setup so frequency and shift can easily be adjusted (witrh the NTX2) http://yfrog.com/z/hsfjawyj
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[20:19] <Morseman> If WX forecast is correct I may have to take the vertical down tomorrow!
[20:24] <nigelvh> What would that forecast be?
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[20:42] <Morseman> Sorry nigelvh was doing diner
[20:43] <nigelvh> No problem
[20:44] <Morseman> Saying going to be windy tomorrow/wednesday
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[20:46] <nigelvh> Is your vertical not terribly stable?
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[20:49] <fsphil> mine certainly isn't
[20:51] <Morseman> No, the bracket is held by just two rawlbolts the other two are loose!
[20:51] <Morseman> and it's one of theose cheap "TV" types where parts not all welded together!
[20:59] <nigelvh> Fun stuff. (or not). My vertical is on a PVC pole, that slides over a stake in the yard. Though, I'm surrounded by trees, so not much wind.
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[21:02] <Laurenceb_> http://www.youtube.com/watch?v=NiAtT2Sxdu0&list=UUHq-5fr8fGEsntnNDdJ_ohQ&index=1&feature=plcp
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[21:13] <SpeedEvil> neat
[21:15] <eroomde> yo
[21:15] <danielsaul> http://saul.im/cTR8
[21:15] <danielsaul> oops
[21:15] <danielsaul> ignore
[21:15] <eroomde> a picture of a willy
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[21:15] <eroomde> wrong channel
[21:16] <natrium42> is it right for any channel?
[21:16] <natrium42> :P
[21:17] <danielsaul> :P]
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[21:31] <eroomde> my housemates friend is doing her impression of a horse
[21:31] <eroomde> which looks a bit like a giraffe being tortured
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[21:33] <UpuHome> Hexapods and Quad copters are cool : http://www.youtube.com/watch?feature=player_embedded&v=HuC6q9kbryw#!
[21:33] <UpuHome> that one especially so
[21:34] <Morseman> Formation flying quadcopters http://spectrum.ieee.org/automaton/robotics/industrial-robots/quadrotor-formation-flying-gets-aggressive
[21:34] <UpuHome> yeah saw that one
[21:34] <UpuHome> stunning really
[21:35] <Morseman> And I've seen YouTubes of many of them lining up and working out which should fly through gaps and reform the other side...
[21:35] <eroomde> very cool stuff
[21:35] <UpuHome> someone needs to invent a better battery
[21:36] <eroomde> but... there is a night and day difference in what you can do in a computer vision room like theirs and what you can do when the processing has to all be onboard the copters themselves with builtin sensors
[21:36] <UpuHome> of course
[21:36] <UpuHome> can't help thinking sonar would be better
[21:37] <eroomde> when they can do that kind of thing with on board of mesh intelligence, i will start to welcome our new quadcopter overlords
[21:37] <eroomde> or mesh*
[21:37] <Morseman> MERSH ?
[21:37] <UpuHome> humans will be cast to the side as the hexapods battle it out with the quadcopters*
[21:37] <UpuHome> *for 5 mins until the batteries go flat
[21:38] <eroomde> :)
[21:38] <eroomde> i made a hexapod once for my a-level dt project
[21:38] <eroomde> i got some digital servos
[21:38] <eroomde> it pulled about 10A just to stand up
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[21:38] <UpuHome> yeah thats not going to last long
[21:38] <eroomde> http://fc06.deviantart.net/fs7/i/2005/176/8/9/My_Walking_Robot_by_eddymoore.jpg
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[21:39] <UpuHome> that look slike it should have been in Robot Wars
[21:40] <eroomde> i would with enough lighting to
[21:40] <eroomde> i did do robotwars once
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[21:40] <UpuHome> which robot ?
[21:40] <Morseman> That should have said SMERSH...
[21:43] <eroomde> oh just featherweights
[21:44] <fsphil> they had some featherweights on with the house robots once, the scale was just silly
[21:44] <eroomde> a friend and i organised a couple of featherweight events
[21:44] <eroomde> in 2003!
[21:44] <eroomde> which was ages ago
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[21:44] <fsphil> we should do that after the next hab conference :)
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[21:50] <eroomde> this was the second event stu and i did
[21:50] <eroomde> http://www.ukrobotics.com/ukrobotics/index2.htm
[21:50] <eroomde> complete with geocities style web design
[21:50] <UpuHome> nice :)
[21:50] <fsphil> <blink>
[21:50] <UpuHome> Always did like Razer
[21:50] <UpuHome> looked fantastic
[21:50] <fsphil> a lot of work went into razer
[21:54] <eroomde> it was pretty beautiful
[21:55] <eroomde> they never wanted to run it at live events
[21:55] <eroomde> incase it got damaged
[21:55] <UpuHome> understandable
[21:55] Nick change: UpuHome -> Upu
[21:56] <Upu> anyway nn
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[22:13] <Matt_soton> chase cars everywhere
[22:13] <priyesh> hehe
[22:16] <G0DJA> Tme for bed - GN all
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[22:42] <griffonbot> Received email: Priyesh Patel "[UKHAS] Android Chase Car Tracker App"
[22:42] <jonsowman> good work priyesh
[22:42] <priyesh> :)
[22:44] <fsphil> now if I could find my phone
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[00:00] --- Tue Apr 3 2012