highaltitude.log.20091029

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[00:06] <Randomskk> fergusnoble: apparently not then
[00:06] <Randomskk> hmm
[00:08] <Randomskk> in which case would any particular time be convenient for you to open the lab? or I can wait until monday, no particular rush
[00:09] <fergusnoble> no, may as well do it tomorrow
[00:09] <fergusnoble> I have lectures until midday but any time after that is fine with me
[00:10] <Randomskk> I have a supervision 2 to 3, could do somtime between 12 and 1 or any time after 3
[00:10] <fergusnoble> up to you
[00:10] <fergusnoble> i guess after 3 is probably better incase it ends up taking longer than you think
[00:11] <Randomskk> something has gone very wrong if it takes a whole hour, but then again there is this vreg thing
[00:11] <Randomskk> if you're around at 12 anyway due to lectures it'd save you a round trip
[00:11] <Randomskk> and I'm around engineering 9 to 11 anyway so can hang around in the library for an hour and maybe even do some real work
[00:11] <fergusnoble> I have lecture in west cambridge
[00:11] <Randomskk> ah
[00:11] <Randomskk> less fun
[00:11] <Randomskk> well I guess the lectures are fun
[00:12] <fergusnoble> hehe, not tomorrow at least
[00:12] <Randomskk> haha yea in which case, 3:30pm?
[00:12] <fergusnoble> but I should probably go, not been in quite a while
[00:12] <Randomskk> ooh. tomorrow I have the first eng appls and the first linear circuits lecture
[00:12] <Randomskk> finally finished physical principles for this term
[00:13] <fergusnoble> are those good courses?
[00:13] <Randomskk> dunno yet :p
[00:13] <Randomskk> linear circuits has to be better than physical principles, eng appls may or may not be interesting, depends how similar it is to engineer in society
[00:14] <fergusnoble> our linear ccts type course was dreadful
[00:15] <fergusnoble> but hopefully if its from a more engineeringy point of view its better
[00:15] <Randomskk> hopefully :p will find out soon at any rate
[00:15] <Randomskk> hmm I guess 3:30 would be best then?
[00:16] <Randomskk> I figured out I can do the vreg thing with a single green wire on a single pin to another pin, should be relatively straightforward
[00:16] <Randomskk> in the end I got a vreg with the same pinout, the difference is that its enable is active high, the other had enable active low
[00:19] <fergusnoble> cool, thats not too hard an adjustment to make
[00:19] <Randomskk> yea, just wire that pin to the input one
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[00:19] <Randomskk> everything else should hopefully be fine
[00:20] <fergusnoble> yup
[00:20] <fergusnoble> you should bring a programmer along to check it though
[00:20] <Randomskk> yup
[00:20] <fergusnoble> sorry
[00:20] <Randomskk> serial bootloader pre-installed = win
[00:20] <Randomskk> is there a linux machine in the lab or should i bring my laptop
[00:21] <Randomskk> it just needs to run a python script really
[00:21] <fergusnoble> no, there isnt a pc in the lab
[00:21] <Randomskk> will bring my laptop
[00:21] <Randomskk> since it has everything installed anyway
[00:21] <fergusnoble> cool
[00:21] <fergusnoble> do you have a usb/serial cable?
[00:21] <fergusnoble> I couldnt find my one
[00:21] <Randomskk> got the ftdi breakout board
[00:21] <fergusnoble> although im sure its in the lab somewhere
[00:21] <fergusnoble> ok, cool
[00:21] <Randomskk> which does the same job slightly less neatly
[00:22] <Randomskk> plus a load of mini usb cables
[00:22] <Randomskk> the board can be powered off one, or off a lipo, or hopefully charge the lipo while being pwoered from usb
[00:22] <fergusnoble> well i think my one was at one point an xbee->usb
[00:22] <Randomskk> I have one of those too
[00:22] <fergusnoble> but now its just got some wires attached to where the xbee should be
[00:22] <Randomskk> hehe
[00:23] <Randomskk> heh I should bring the xbee with me, leave the other in my room, see if they can make contact
[00:23] <Randomskk> "1 mile"
[00:23] <Randomskk> my room is kinda facing entirely the wrong direction though
[00:26] <fergusnoble> yeah, just shell into your laptop and use the xbee
[00:26] <Randomskk> I can even have it do the serial bootloading over xbee
[00:26] <fergusnoble> so its going to run from the xbee in flight?
[00:27] <fergusnoble> so the bootloader is on the same port that the xbee is designed to go on?
[00:27] <Randomskk> yea.
[00:27] <Randomskk> problem is the bootloader requries even parity
[00:27] <Randomskk> so the xbees have to be configured to do that
[00:27] <Randomskk> which means all the rest of my serial comms would also require even parity
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[00:28] <Randomskk> doable, but getting screen to do it is a pain, so I'd have to use some other terminal emulator.
[00:28] Nick change: ChezaWho_ -> ChezaWho
[00:28] <Randomskk> also it is really slow compared to wired
[00:32] <fergusnoble> whats the maximum baud rate?
[00:32] <fergusnoble> kermit is a good terminal emulator
[00:33] <Randomskk> technically baud rate is 115200
[00:34] <Randomskk> but they have these weird hidden buffers inside
[00:34] <Randomskk> so their actual tx rate is liable to be less and depends on signal quality
[00:34] <Randomskk> it's a packet radio system with acknowledgement, so sometimes packets are resent, and individual bytes tend to be queued up many to a packet and all sent at once
[00:39] <fergusnoble> ok, thats a bit annoying
[00:39] <Randomskk> yea.
[00:39] <Randomskk> but it's generally "fast enough" and very easy.
[00:39] <fergusnoble> do you think that will cause problems for control in flight?
[00:40] <Randomskk> ideally nothing going over the radio should be time critical to that level
[00:40] <fergusnoble> ok
[00:40] <Randomskk> it should be GPS co-ordinates to the quad, and telemetry back
[00:40] <fergusnoble> ah i see
[00:41] <Randomskk> before that I will presumably have control signals in the normal 3 channels or whatever
[00:41] <Randomskk> spin, throttle, tilt forward/back, tilt left/right
[00:41] <Randomskk> 4 channels
[00:41] <Randomskk> but those will come from a person on a controller and really don't update that fast
[00:41] <Randomskk> plus will always be able to see the quad while manually flying, so signal should be very good
[00:42] <Randomskk> right, anyway, I'd better get to sleep. not gonna make any progress on structural mechanics at 0040 :p
[00:42] <SpeedEvil> wave
[00:42] <Randomskk> I'll see you tomorrow at 3:30 then
[00:43] <Randomskk> seeya SpeedEvil
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[00:44] <fergusnoble> ok see you then
[00:44] <fergusnoble> bye
[00:44] <Randomskk> seeya
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[07:15] <jcoxon> morning
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[08:15] <MikeMc> morning
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[08:20] <jcoxon> hey MikeMc
[08:20] <MikeMc> hey
[08:23] <jcoxon> just working out what i'm going to do for my talk
[08:23] <MikeMc> i see
[08:37] <jcoxon> fergusnoble, is it okay if i borrow some of the info off your hab/radio talk you gave to the cuws?
[08:37] <jcoxon> am doing a talk next week at hackspace
[08:37] <fergusnoble> jcoxon: yeah thats fine
[08:38] <fergusnoble> feel free to use the diagrams or anything you want
[08:38] <fergusnoble> there is a pdf on the cusf wiki
[08:39] <jcoxon> yeah i've got a copy from a while ago
[08:40] <fergusnoble> ok, g2g, lectures
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[08:42] <rjharrison> I need the pink stuff
[08:43] <rjharrison> aaaaahhhh!!!
[08:43] <rjharrison> SpeedEvil get your deity hat on!
[08:44] <rjharrison> BTW pink stuff is good weather for HAB launching
[08:44] <rjharrison> http://www.wunderground.com/modelmaps/maps.asp?model=GFS&domain=I_UK
[08:44] <rjharrison> Use the GFS 200mb model
[08:44] <jcoxon> no pink right now
[08:44] <rjharrison> nope :(
[08:45] <rjharrison> I hate having deadlines for launches
[08:45] <rjharrison> Failing all else I'll do a sacrificial launch into Europe
[08:45] <rjharrison> Do we have any HAB friends in the neatherlands
[08:48] <jcoxon> rjharrison, not that i know of
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[08:53] <MikeMc> what is it you are going to launch?
[08:55] <jcoxon> MikeMc, its a altitude attempt
[08:58] <MikeMc> cool
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[09:18] <Virca2554> Hi
[09:19] <jcoxon> hi
[09:19] <Virca2554> Oops
[09:19] Nick change: Virca2554 -> MikeMc_
[09:19] <MikeMc_> :)
[09:19] <MikeMc_> Trying out a different IRC client on my BB
[09:20] <MikeMc_> Any likelihood of a launch over the next 3 days?
[09:21] <MikeMc_> I'm dying to try out the radio and track a flight
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[09:22] <Virca2554> Goddamit
[09:22] Nick change: Virca2554 -> MikeMc
[09:22] <MikeMc> None of these IRC clients ever stay connected
[09:23] <SpeedEvil> screen
[09:23] <MikeMc> If anyone answered my question I missed it
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[09:25] <SpeedEvil> they diddn't
[09:25] <SpeedEvil> oh
[09:29] <rjharrison> Firday the 13th November looks good :)
[09:29] <rjharrison> According to wundergroubd
[09:30] <jcoxon> rjharrison, haha 13th is a looooong way away
[09:36] <jcoxon> bbl
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[10:50] <MikeMc> hi
[10:55] <MikeMc> rjharrison: Is your launch likely to be over the next 3 days?
[10:56] <SpeedEvil> MikeMc: have you considered screen + a shell client as a proxy? Or one of the proxy services?
[11:03] <Paul2> +1 to ssh, screen+irssi
[11:09] <MikeMc> not tried that
[11:09] <MikeMc> but i was specifically looking for an IRC client for my Blackberry
[11:09] <MikeMc> there are only 2 i've come across and both are crap
[11:15] <Paul2> get an ssh client for your |blackberry then :)
[11:19] <MikeMc> sounds technical - how would i use IRC with that?
[11:22] <Randomskk> irssi
[11:23] <Randomskk> it's a text based irc client that would run on your server/computer and your phone SSHs in
[11:23] <Randomskk> it's probably not really the best solution for a blackberry.
[11:25] <MikeMc> hmm
[11:25] <Randomskk> but it is an awesome solution. I use it for my regular irc needs, plus IM, and my phone can ssh to it
[11:26] <MikeMc> so if i understand correctly - on your home PC you have IRC running and you can then log in from other PC's (work for example ) or your phone and basically use that IRC client like a remote desktop app?
[11:27] <SpeedEvil> basically, yes.
[11:28] <Randomskk> yup.
[11:28] <Randomskk> consequentially irc can be running the whole time, you don't miss stuff, people can leave you messages easily, you can connect using multiple devices at once, etc
[11:29] <MikeMc> like Quassell right?
[11:29] <Randomskk> apparetly
[11:29] <Randomskk> apparently*
[11:29] <Randomskk> never used it
[11:29] <SpeedEvil> seems the same basic idea
[11:29] <MikeMc> k
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[11:50] <MikeMc> hello
[11:50] <SpeedEvil> hello again.
[11:51] <MikeMc> using Quassel now
[11:51] <MikeMc> set up core on my OSX system at home (via LogMeIn)
[11:51] <MikeMc> about to log in using it at work
[11:51] <SpeedEvil> :)
[11:52] <MikeMc> didnt even reaslise i could do this
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[11:55] <MikeMc> ive led a sheltered life
[11:57] <fergusnoble> MikeMc: if you run OS X you should have a look at colloquy
[11:57] <fergusnoble> definately the best IRC cleint I have seen
[11:58] <MikeMc> yeah i use that on the mac
[11:59] <MikeMc> but at work i have xp
[11:59] <MikeMc> can i connec to it from windows somehow?
[12:00] <fergusnoble> I dont know
[12:01] <MikeMc> ok
[12:01] <SpeedEvil> http://bugs.quassel-irc.org/projects/quassel-irc/wiki/Build_Quassel_on_Windows
[12:01] <SpeedEvil> dunno about binaries
[12:09] <sbasuita> Ouch
[12:09] <sbasuita> just use the irssi proxy
[12:10] <Randomskk> tbh I'd rather use irssi on screen and ssh than irssi proxy
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[12:14] <MikeMc> cool
[12:14] <MikeMc> logged in from work now
[12:14] <MikeMc> works :D
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[12:15] <MikeMc> just need to figure a way to do it from the BB now
[12:19] <SpeedEvil> get a n900?
[12:19] <MikeMc> lol
[12:22] <MikeMc> Does anyone know if there is a launch over the next 3 days please?
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[12:27] <rjharrison> Hey MikeMc
[12:27] <rjharrison> What radio did you get
[12:27] <rjharrison> There is going to be alot of launch activity going on when the weather gets better
[12:27] <rjharrison> Hi DanielRichman
[12:28] <DanielRichman> hello rjharrison
[12:28] <Randomskk> I really need to look into getting a radio setup. what's a good kinda place to start?
[12:28] <rjharrison> MikeMc no chance of launch in the next week or so
[12:28] <rjharrison> Randomskk it's a good question
[12:29] <rjharrison> There is alot of stuff going to be on 434Mhz for a while
[12:29] <DanielRichman> Where is Ubuntu 9.10?
[12:29] <rjharrison> But 800 mHz is coming and for that the typical ham radios won't cover
[12:30] <Randomskk> why higher frequency?
[12:30] <rjharrison> the good news is that for those a 20 quid RX module and a bit of soldering mught do the trick
[12:30] <rjharrison> Well hier freqency has > power allowed
[12:30] <rjharrison> 200mw iirc
[12:30] <Randomskk> ah, right
[12:31] <rjharrison> and that should more than compensate for the loss of propagation due to the higher frquency
[12:31] <rjharrison> Plus a 1/4 wave antennae on 800Mhz is going to be a 1/2 the size of on on 434Mhz
[12:32] <Randomskk> do we have useful 800mhz tx? I know atm cusf at least use that 8052 with builtin 434
[12:32] <rjharrison> I'm not exactly sure of the 800Mhz frequency but Rocketboy has more into
[12:32] <rjharrison> info
[12:32] <rjharrison> Radiometrix do a module
[12:32] <Randomskk> okay
[12:33] <Randomskk> might be worth getting something that'l cover 434 anyway - is that technically vhf?
[12:33] <Randomskk> or uhf?
[12:33] <Randomskk> I guess uhf.
[12:33] <rjharrison> http://www.radiometrix.co.uk/products/tx3h.htm
[12:34] <rjharrison> Randomskk well I would recommend an FT817NT which is perfect for hab
[12:34] <rjharrison> But if you think you're going to be a HF ham then perhas some thing with a bit more power
[12:34] <Randomskk> if all goes to plan I should have both foundation and intermediate a week tomorrow
[12:35] <Randomskk> but I dunno how much I'd be doing from home anyway
[12:35] <Randomskk> if I wanted high power hf there's the cuws shack
[12:35] <Randomskk> sure ft817nt is correct? can't find anything on it
[12:36] <Randomskk> got ft817, nvm
[12:36] <rjharrison> http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=06014CD0AFA0702B25B12AB4DC9C0D27&DivisionID=65&isArchived=0
[12:36] <rjharrison> sorry ND
[12:38] <rjharrison> Randomskk The 817 has all the data options which is necessary for HAB
[12:38] <rjharrison> SSB Single sideband data etc...
[12:38] <Randomskk> okay
[12:39] <Randomskk> and then I take it the 857 is better and the 897 better still?
[12:41] <Randomskk> brb lunch
[12:45] <rjharrison> Randomskk no
[12:45] <rjharrison> The 897 is better in power but not porability
[12:45] <rjharrison> and hab is mobile
[12:45] <rjharrison> so yas and no to the 857 897 being better
[12:46] <rjharrison> I do have the 897 at home though as a base station
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[12:49] <Laurenceb> hello
[12:49] <rjharrison> hi Laurenceb
[12:53] <SpeedEvil> I've finally found why Laurenceb wants an electric skateboard.
[12:53] <SpeedEvil> http://xkcd.com/139/
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[12:55] <Paul2> 10.07 http://xkcd.com/651/ is painfully true
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[13:23] <AlexBreton> good day everyone
[13:23] <AlexBreton> our powershot A80 is definitively screwed, pink sky
[13:23] <AlexBreton> looks like what someone would see whilst tripping
[13:24] <AlexBreton> we need a new camera
[13:24] <SpeedEvil> :/
[13:24] <AlexBreton> should we avoid the powershot range, since this problem has been seen to recur?
[13:24] <SpeedEvil> you might try ebaying the screen as a partial replacement cost
[13:24] <AlexBreton> the CCD is broken
[13:25] <AlexBreton> possible
[13:25] <AlexBreton> but it's not worth much more than srap
[13:25] <AlexBreton> and we took the cover off the screen
[13:25] <DanielRichman> did we?
[13:25] <DanielRichman> you mean the lcd screen
[13:25] <DanielRichman> that's healthy
[13:26] <AlexBreton> yeah, but who would want it?
[13:26] <DanielRichman> Essentially the problem was described in a Canon advisary, listing affected models. Some dodgey manufacture, they offer to fix it for free but i doubt they'll like what i've done to it with a soldering iron.
[13:26] <DanielRichman> sbasuita thinks that we should avoid the whole range
[13:26] <DanielRichman> AlexBreton thinks that the problem won't reoccur if we just get another A80
[13:26] <DanielRichman> what is the advice of #ha?
[13:27] <DanielRichman> (and if so, what's a good camera to get on ebay as a replacement?)
[13:27] <DanielRichman> AlexBreton, BRB
[13:28] <DanielRichman> ping rjharrison
[13:28] <DanielRichman> be right back
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[13:32] <AlexBreton> any answers?
[13:48] <MikeMc> rjharrison: it is the NTX2
[13:49] <rjharrison> Yep
[13:50] <rjharrison> Ping DanielRichman
[13:50] <DanielRichman> hello rjharrison
[13:50] <rjharrison> AlexBreton how do you know what people see when they're tripping?
[13:51] <AlexBreton> read Hunter S Thompson
[13:51] <rjharrison> lol
[13:51] <AlexBreton> 'Fear and Loathing in Las Vegas'
[13:51] <AlexBreton> tells you all about drugs and their effects--far more entertaining than actually taking the drugs
[13:51] <AlexBreton> anyway
[13:51] <AlexBreton> the camera
[13:52] <rjharrison> We move swiftly on, but as an aside a bit of experiance is good
[13:52] <rjharrison> The camera A560 has done me and CUSF proud on many launches
[13:52] <AlexBreton> I see
[13:53] <DanielRichman> let me dig up t hat link jcoxon had given us
[13:53] <AlexBreton> there's a fairly cheap A80 on ebay now
[13:53] <rjharrison> I place the camera internal to the payload
[13:53] <rjharrison> And use a UV filter stuck to the outside of the payload
[13:53] <MikeMc> where do you get your UV filter?
[13:54] <rjharrison> AlexBreton what's the budget
[13:54] <MikeMc> Is it a standard photographic one?
[13:54] <AlexBreton> 45 pounds
[13:54] <rjharrison> Jessops
[13:54] <MikeMc> ok
[13:54] <rjharrison> Yeo
[13:54] <rjharrison> p
[13:54] <AlexBreton> there's a buy it now for 50
[13:54] <AlexBreton> BRAND NEW
[13:54] <AlexBreton> holy ****
[13:55] <DanielRichman> http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=225&modelid=13390&keycode=2112&id=48264
[13:55] <AlexBreton> http://cgi.ebay.co.uk/Canon-PowerShot-A560-Digital-Camera_W0QQitemZ140355137027QQcmdZViewItemQQptZUK_CamerasPhoto_DigitalCameras_DigitalCameras_JN?hash=item20add16e03
[13:55] <AlexBreton> we're buying dat^
[13:55] <rjharrison> http://cgi.ebay.co.uk/Canon-PowerShot-A560-Digital-Camera_W0QQitemZ140355137027QQcmdZViewItemQQptZUK_CamerasPhoto_DigitalCameras_DigitalCameras_JN?hash=item20add16e03
[13:55] <AlexBreton> beat ya to it :P
[13:56] <AlexBreton> what thread is the UV filter?
[13:56] <rjharrison> I got a 55mm iirc
[13:56] <MikeMc> why that camera?
[13:56] <rjharrison> and cut a circle out of the front of the payload
[13:56] <AlexBreton> ok
[13:56] <DanielRichman> okey
[13:56] <rjharrison> MikeMc CHDK and it has good video and pic qulaity
[13:56] <DanielRichman> rjharrison: should we solderhack it or use that software?
[13:57] <DanielRichman> CHDK
[13:57] <DanielRichman> most likely is easier
[13:57] <rjharrison> CHDK software hack
[13:57] <MikeMc> i've got an S400 is that any good?
[13:57] <DanielRichman> okey
[13:57] <rjharrison> Are you just taking pics and video?
[13:57] <DanielRichman> AlexBreton: surely we can get it cheaper if we don't buy it now
[13:57] <rjharrison> MikeMc is it cannon?
[13:57] <DanielRichman> rjharrison: just photos
[13:57] <DanielRichman> rjharrison: how long does it last on lithiums
[13:57] <AlexBreton> DanielRichman, this one is new
[13:57] <DanielRichman> AlexBreton: ok
[13:57] <MikeMc> Canon Powershot S400
[13:57] <AlexBreton> still in box
[13:57] <MikeMc> called Ixus 400 in UK
[13:57] <AlexBreton> can't fail
[13:58] <rjharrison> DanielRichman that is a good price
[13:58] <AlexBreton> yes
[13:58] <AlexBreton> for brand new it's excellent
[13:58] <rjharrison> If AlexBreton dosn't buy it in 5 mins I'll buy it :)
[13:58] <AlexBreton> there are 3 available
[13:58] <AlexBreton> feel free ;-)
[13:59] <AlexBreton> DanielRichman, please see skype
[13:59] <russss> hey, I have a canon a640 which I haven't used for ages.
[13:59] <DanielRichman> AlexBreton: what about skype?
[13:59] <AlexBreton> look in da window
[14:00] <AlexBreton> the chat
[14:00] <AlexBreton> stuff to do
[14:00] <DanielRichman> AlexBreton: ok get it. also, don't disassemble it; we can use this CHDK software on it to automate taking of photos without solder
[14:00] <AlexBreton> wow...
[14:00] <AlexBreton> automation...
[14:00] <DanielRichman> AlexBreton: i'll remove the photo takign functionality from teh flight computer board
[14:00] <AlexBreton> do eet
[14:00] <AlexBreton> I'll buy the camera ;-)
[14:00] <AlexBreton> may take a while to arrive tho
[14:00] <AlexBreton> payment is a pain
[14:00] <rjharrison> 2 left now :)
[14:00] <MikeMc> So you can upload scripts to the camera using CHDK?
[14:01] <rjharrison> Yep
[14:01] <DanielRichman> AlexBreton: have you bought?
[14:01] <rjharrison> and make it take video / pics and sleep
[14:01] <rjharrison> Very easy
[14:01] <MikeMc> neat
[14:01] <DanielRichman> rjharrison: excellent; will do that.
[14:01] <AlexBreton> DanielRichman, no rush
[14:01] <AlexBreton> if in doubt, cba
[14:01] <DanielRichman> AlexBreton: Yes rush
[14:01] <sbasuita> aite
[14:01] <DanielRichman> AlexBreton: there's only 2 left now
[14:01] <rjharrison> I have one one it's way now
[14:01] <sbasuita> buy it then
[14:02] <sbasuita> expense to school later
[14:02] <DanielRichman> haha
[14:02] <sbasuita> get a receipt
[14:02] <DanielRichman> okey
[14:02] <DanielRichman> AlexBreton: buy it
[14:02] <AlexBreton> done
[14:02] <rjharrison> I have happily been paying 65 for these cams + p&p
[14:02] <DanielRichman> okey. will flash the flight computer later to remove camera taking software and will remove the opto isolators to save power
[14:02] <DanielRichman> AlexBreton: when does it arrive?
[14:02] <AlexBreton> in a week
[14:02] <MikeMc> so has anyone used that camera on a flight? How long does the battery last?
[14:02] <DanielRichman> AlexBreton: ok. When it does we build the payload
[14:02] <AlexBreton> once payment is out
[14:03] <DanielRichman> MikeMc: lasts freaking ages if you use lithiums
[14:03] <rjharrison> DanielRichman it's alot better as you will end up with a working camera at the end
[14:03] <AlexBreton> argh there goes my paypal balance
[14:03] <DanielRichman> rjharrison: indeed. I trust it takes lithiums
[14:03] <AlexBreton> more shit to pay for...
[14:03] <rjharrison> Yep
[14:03] <DanielRichman> rjharrison: the A80 lasted 10 hours and more before i cba'd to continue on lithiums
[14:03] <AlexBreton> all you people want is more more more more more
[14:03] <DanielRichman> AlexBreton: you, being the secretary, have to deal with this shit,
[14:03] <DanielRichman> but in the end you don't have to foot the bill
[14:03] <AlexBreton> is the money
[14:03] <rjharrison> I have had 10 hours in hab extremes doing 8pics and 2min video on 5 min cycles
[14:04] <DanielRichman> so chillax
[14:04] <MikeMc> nice
[14:04] <AlexBreton> my pocket is 140 pounds lighter
[14:04] <MikeMc> i bought one too btw ;)
[14:04] <rjharrison> AlexBreton cool I think I blew 5k in my hab life so far
[14:04] <rjharrison> Though I did get a bit back recently
[14:04] <MikeMc> jesus!
[14:04] <DanielRichman> AlexBreton: i'm about to sever the A80 form the flight computer
[14:05] <DanielRichman> AlexBreton: any last wishes?
[14:05] <DanielRichman> sbasuita: ?
[14:05] <rjharrison> BTW on the 17th November I should have the front page of the The Sun
[14:05] <rjharrison> Might be work grabing a copy for 20p
[14:06] <DanielRichman> AlexBreton: ??
[14:06] <rjharrison> I popped the frontpage up for them at the beginning of the month
[14:06] <rjharrison> DanielRichman scrap it
[14:06] <SpeedEvil> woo!
[14:06] <rjharrison> SpeedEvil thatnks
[14:07] <sbasuita> nice rjharrison
[14:07] <AlexBreton> If I don't get that money back from the school I'm going to be seriously pissed off
[14:07] <rjharrison> AlexBreton you'll have a cool camera if you don't
[14:08] <AlexBreton> I already have 7 cameras
[14:08] <rjharrison> Someone on here will buy it afterewards I'm sure
[14:08] <AlexBreton> I don't need more?!
[14:08] <AlexBreton> yeah I guess
[14:08] <rjharrison> It's great set to take one pic every 10 mins and point at something growing
[14:08] Action: DanielRichman salvages an opto isolator and four lithiumsm from the trainwreck of the A80 setup
[14:09] <AlexBreton> you broke mah camerah :(
[14:09] <DanielRichman> tbf you broke the camera
[14:09] <DanielRichman> i tracked down the point when teh ccd broke; we were in the chemsitry lab
[14:09] <DanielRichman> you were closer to it, blatantly
[14:09] <MikeMc> i could put an A560 plus 2 x Ixus 400's on mine
[14:09] <AlexBreton> I never touched it
[14:10] <DanielRichman> suuuuuuuure
[14:10] <AlexBreton> nvm
[14:12] <rjharrison> http://www.flickr.com/photos/30721501@N05/3572705436/in/set-72157618814637849/
[14:12] <rjharrison> MikeMc where abouts are you?
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[14:12] <MikeMc> Orpington
[14:13] <rjharrison> DanielRichman that is my current payload set up
[14:13] <rjharrison> Oh kent
[14:13] <MikeMc> yep
[14:13] <DanielRichman> rjharrison: looks amazing
[14:13] <rjharrison> My cousin live in orpington
[14:13] <MikeMc> ok
[14:13] <DanielRichman> rjharrison: this UV filter, how would we go about getting/using it?
[14:14] <rjharrison> Just cut hole in front of payload foam
[14:14] <rjharrison> Insert and glue with HMG
[14:14] <DanielRichman> doesn't it distord the picture?
[14:14] <DanielRichman> like taking photos through a window
[14:14] <rjharrison> No I think it actually enhances the pics
[14:14] <rjharrison> The results are on that screen
[14:14] <DanielRichman> okey
[14:14] <rjharrison> It was a concern
[14:15] <rjharrison> but I think the results speak for themselves
[14:15] <MikeMc> what's the battery pack for?
[14:15] <sbasuita> AlexBreton, what do you think about getting a UV filter
[14:15] <rjharrison> http://www.flickr.com/photos/30721501@N05/sets/72157618814637849/
[14:15] <rjharrison> This is dawn rising over the channel
[14:16] <SpeedEvil> UV filters can greatly improve POS cameras in high UV environs
[14:16] <DanielRichman> rjharrison: have you built and boxed the third payload with camera servo etc?
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[14:17] <rjharrison> DanielRichman yes
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[14:17] <rjharrison> DanielRichman do you have servo control on yours
[14:17] <DanielRichman> rjharrison: can i have a picture ? :P
[14:17] <DanielRichman> rjharrison: nah, no servos on flight #1
[14:17] <rjharrison> DanielRichman sure when it's complete
[14:17] <DanielRichman> rjharrison: ah, ok
[14:18] <MikeMc> I was thinking of putting a servo on mine
[14:18] <MikeMc> but i could just put 3 cameras on at different angles
[14:18] <MikeMc> Any reason why your camera is inside the payload and not outside?
[14:18] <rjharrison> MikeMc it's cool but another thing to go wrong. With 3 cams you'll be fine but quite heavy
[14:18] <rjharrison> Yep -55C
[14:19] <rjharrison> Inside the payload I can keep at a cosy 0C to +10C
[14:19] <MikeMc> that cold? wow
[14:19] <rjharrison> Plus camera hitting you on head is better if in box
[14:19] <MikeMc> i guess a curved window if you wanted servo control
[14:19] <rjharrison> No I'm goind for up down and horizontal
[14:20] <rjharrison> 3 filters
[14:20] <rjharrison> all perpendicular to one another
[14:20] <MikeMc> or the camera in its own insulated box which is in turn attached to a servo
[14:20] <rjharrison> Yep you could do that
[14:20] <rjharrison> Alexis did (Natrium42)
[14:21] <rjharrison> But I like to rape the head for the PCB too
[14:21] <MikeMc> those pictures are incredible
[14:21] <rjharrison> They are a bit murcy due to dawn
[14:21] <MikeMc> nice sun off teh water though
[14:21] <rjharrison> http://www.flickr.com/photos/30721501@N05/3576413504/in/set-72157618814637849/
[14:21] <rjharrison> You can see across the channel on this one
[14:22] <MikeMc> wow
[14:22] <rjharrison> The lower third on the RHS is france accross the channel
[14:22] <MikeMc> what altitude was that?
[14:22] <rjharrison> 33K
[14:22] <rjharrison> ~
[14:22] <AlexBreton> nice pic
[14:22] <AlexBreton> some nasty lens flare, but ah well;
[14:23] <MikeMc> 33k! Wow
[14:23] <rjharrison> MikeMc this is my favorite http://www.flickr.com/photos/30721501@N05/2961972182/in/set-72157608235936214/
[14:23] <DanielRichman> lens flare is good
[14:23] <rjharrison> From fist launch ever
[14:24] <MikeMc> that's incredible
[14:24] <MikeMc> this is what makes it all worth the effort
[14:24] <AlexBreton> lens flare is crap
[14:25] <AlexBreton> only to be expected though
[14:25] <rjharrison> MikeMc Yep I can remember seeing those pics for the first time
[14:26] <rjharrison> MikeMc the last one was from 35K
[14:26] <MikeMc> i bet
[14:26] <MikeMc> wow
[14:26] <rjharrison> Been lucky so far and managed to grap the UK alt record for the time being
[14:26] <MikeMc> is 30k a realistic height for a first launch?
[14:26] <rjharrison> I'm hoping to have a stab at the world record on the next launch day
[14:27] <rjharrison> MikeMc yep 30k is typical
[14:27] <MikeMc> what's the UK and World records?
[14:27] <rjharrison> Getting it to land in the UK is the tricky bit
[14:27] <DanielRichman> need an expendable payload
[14:27] <DanielRichman> rediculously light
[14:27] <DanielRichman> just computer gps radio
[14:27] <DanielRichman> £50
[14:28] <DanielRichman> send it straight up and don't expect it back
[14:28] <DanielRichman> but try to b reak the record
[14:28] <MikeMc> How can a record be proved though?
[14:28] <rjharrison> DanielRichman yep that's about my payload with a 3000g balloon
[14:28] <AlexBreton> 3000g is the biggest available?
[14:28] <rjharrison> 3 independent recievers
[14:28] <rjharrison> AlexBreton yep in latex
[14:29] <AlexBreton> nice
[14:29] <DanielRichman> yeah but tbf i could send my balloon up to 10k and have it fake the altitude field
[14:29] <MikeMc> exactly
[14:29] <rjharrison> I guess you could try to fake the alt
[14:29] <rjharrison> There is an element of trust granted
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[14:29] <DanielRichman> indeed
[14:30] <rjharrison> but normally there are a few people at the launch
[14:30] <MikeMc> so is the next launch likely to be in the next 3 days?
[14:30] <MikeMc> I'm dying to track a flight with my radio
[14:30] <rjharrison> MikeMc
[14:31] <rjharrison> see http://www.wunderground.com/modelmaps/maps.asp?model=GFS&domain=I_UK
[14:31] <rjharrison> load up the GFS 200mb model
[14:31] <MikeMc> sorry you already answered that one
[14:31] <DanielRichman> What kind of scientific instruments could we pack a payload with?
[14:31] <DanielRichman> this is for flight #2
[14:31] <DanielRichman> just wondering what we could put on board.
[14:31] <AlexBreton> GM tube!
[14:31] <rjharrison> and look for the day when the UK is in the pink
[14:31] <AlexBreton> pressure, temp...
[14:31] <rjharrison> I'll be launching that day as will a few others
[14:31] <SpeedEvil> pressure, temp, humidity
[14:31] <AlexBreton> UV sensor
[14:31] <rjharrison> UV would be interesting
[14:32] <AlexBreton> I think a geiger counter would top it
[14:32] <SpeedEvil> balloon temp
[14:32] <MikeMc> so why in the pink?
[14:32] <SpeedEvil> that is the envelope temp
[14:32] <rjharrison> I have the others on Icarus III but the more data the better
[14:32] <DanielRichman> could go for the measure alpha/beta/gamma too
[14:32] <rjharrison> Pink is low jetstream
[14:32] <AlexBreton> we plan on carrying lead sheets? :P
[14:32] <SpeedEvil> (IR thermometer pointed at the latex envelope)
[14:32] <DanielRichman> AlexBreton: but of course
[14:32] <AlexBreton> BTW
[14:32] <AlexBreton> there's this new sony gadget
[14:32] <rjharrison> Which means less chance of dropping in the sea
[14:32] <MikeMc> So Tuesday
[14:33] <DanielRichman> could measure xray and gamma coming in from space
[14:33] <AlexBreton> you stick a camera on it and it rotates taking piccies
[14:33] <AlexBreton> you could stick that on ;-)
[14:33] <DanielRichman> we can do that with a servo
[14:33] <AlexBreton> tad expensive tho
[14:33] <AlexBreton> indeed
[14:33] <DanielRichman> servo is a tad cheaper.
[14:33] <AlexBreton> yeah
[14:33] <rjharrison> MikeMc no tuesday looks like all green which is bad
[14:33] <AlexBreton> and we don't buy sony by matter of principle
[14:33] <rjharrison> GFS 200mb model
[14:33] <AlexBreton> BTW
[14:33] <MikeMc> I was hoping to measure UV levels on mine but a decent sensor plus filter is expensive
[14:34] <AlexBreton> anyone want weather forecasts? my dad has access to ECMWF (european centre for medium-range weather forecasts) data
[14:34] <DanielRichman> could try to sample the air at altitude
[14:34] <DanielRichman> co2, ozone, o2...
[14:34] <AlexBreton> you won't find much CO2
[14:34] <SpeedEvil> Co2 sensors are quite spendy
[14:35] <DanielRichman> mmmh
[14:35] <rjharrison> Right I need to get on with the day job
[14:35] <SpeedEvil> I can't find a good one under 120 quid
[14:35] <DanielRichman> rjharrison: enjoy
[14:35] <rjharrison> DanielRichman thanks
[14:35] <SpeedEvil> I want one to make an excersize meter.
[14:35] <MikeMc> rjharrison: cya
[14:35] <AlexBreton> CO2 must be trace up there
[14:35] <DanielRichman> true
[14:35] <AlexBreton> sinks to the bottom?
[14:35] <DanielRichman> could look for N2 O2 and O3 then
[14:35] <AlexBreton> yeah
[14:35] <SpeedEvil> expired CO2 is the gold-standard for breath.
[14:35] <MikeMc> It would be good to jsut release 1000 ping pong balls
[14:35] <SpeedEvil> gold standard for calories rather
[14:36] <AlexBreton> yes
[14:36] <DanielRichman> carry 1000 ping pong balls to 33k and release?
[14:36] <AlexBreton> spirometer?
[14:36] <MikeMc> yeah
[14:36] <DanielRichman> hehe
[14:36] <AlexBreton> got a cheapskate cardiologist?
[14:36] <MikeMc> would make a great pic
[14:36] <AlexBreton> can't afford one from the factory ;-)
[14:36] <DanielRichman> hmm
[14:36] <DanielRichman> it'd be nice to make a permanant-floating balloon
[14:37] <DanielRichman> if you had two balloons....
[14:37] <DanielRichman> one carries it up, then it releases one and stays at altitude using the other
[14:37] <DanielRichman> possible?
[14:39] <AlexBreton> yeah but the helium would diffuse out of them
[14:39] <AlexBreton> slowly
[14:39] <DanielRichman> hmm.... how to aquire extra helium at 34k
[14:39] <SpeedEvil> I have plans for a metal foil balloon.
[14:39] <DanielRichman> AlexBreton: go build me a fusion reactor
[14:39] <AlexBreton> build this 1st: http://www.imagesco.com/geiger/geiger-counter-kits.html
[14:40] <AlexBreton> how about something else?
[14:40] <AlexBreton> like a bladder
[14:40] <AlexBreton> used to make footballs out of them
[14:40] <AlexBreton> bit heavy though
[14:40] <DanielRichman> interesting AlexBreton, surely though we could just get the wand and the circuitry and integrate it to the flight computer board
[14:41] <DanielRichman> brb
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[14:42] <AlexBreton> argh GCSE maths
[14:42] <AlexBreton> ace this biatch
[14:42] <AlexBreton> practice papers...psscht
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[14:45] <MikeMc> ok i'm off to pick up my NTX2
[14:45] <Daniel_Richman> AlexBreton, sbasuita, we need to build a TX and RX antenna, don't forget
[14:46] <AlexBreton> aqye
[14:46] <AlexBreton> sbasuita was taking care of that
[14:47] <Daniel_Richman> hahahhaha
[14:47] <AlexBreton> well, tbf he was
[14:48] <Daniel_Richman> Woop Woop! Ubuntu 9.10 released
[14:48] <Daniel_Richman> ping sbasuita
[14:48] <AlexBreton> woah
[14:48] <AlexBreton> me gets a new mac soon
[14:52] <Daniel_Richman> be back later
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[15:29] <MikeMc> Yay! Got my NTX2
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[15:39] Action: MikeMc is reading the NTX2 datasheet
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[16:04] <MikeMc> are there any sample circuits for connecting an NTX2?
[16:08] <sbasuita> argh
[16:08] <sbasuita> 9.10
[16:09] <sbasuita> total cba upgradr
[16:09] <sbasuita> even though i want to
[16:10] <MikeMc> ahh i've found jcoxons circuit diagram
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[16:31] <Laurenceb> d=c*(b+=x); <- is that code valid in c?
[16:31] <SpeedEvil> yes
[16:31] <SpeedEvil> you get d=c*b
[16:31] <Laurenceb> and b is updated?
[16:31] <SpeedEvil> and b=b+x later
[16:31] <Laurenceb> cool
[16:32] <SpeedEvil> It may well not in fact compile to shorter code than d=c*b;b=b+x though
[16:35] <sbasuita> I'm sure you get d=c*x though
[16:35] <sbasuita> because (b+=x) is equivalent to the value being assigned
[16:36] <sbasuita> oh wait
[16:36] <sbasuita> +=
[16:36] <sbasuita> not sure then ;P
[16:36] <SpeedEvil> err
[16:37] <SpeedEvil> yeah
[16:37] <SpeedEvil> sorry
[16:37] <SpeedEvil> b+= is not a postincrement
[16:37] <SpeedEvil> I was confused
[16:37] <sbasuita> I think we're all a bit confused atm
[16:37] <sbasuita> There must be a nicer way to code that ;)
[16:38] <SpeedEvil> a=1;b=2;d=(a+=b) will set d to the value of a, which is 3
[16:38] <SpeedEvil> My excuse is that I'm eating half my normal dietish.
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[16:48] <rjharrison> MikeMc here is some schematics
[16:49] <rjharrison> http://www.robertharrison.org/svn/filedetails.php?repname=the-icarus-project&path=%2FIcarus+III%2Feagle%2FIcarus+III%2FIcarus.pdf
[16:50] <rjharrison> most of my stuff is in the svn
[16:50] <rjharrison> http://www.robertharrison.org/svn
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[16:51] Action: sbasuita is cleaning out home directory
[16:51] <sbasuita> soooo much crap i don't need
[16:51] <sbasuita> but i keep it to amuse myself every six months :)
[16:51] <MikeMc> rjharrison: great! Thanks for that.
[16:54] <MikeMc> looks like you are shifting yours differently than jcoxon does
[16:58] <rjharrison> MikeMc I try to go for the easy way
[16:58] <rjharrison> 2 pins 2 resistors
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[16:58] <rjharrison> Your choice
[16:58] <rjharrison> Hi edmoore
[16:58] <edmoore> rjharrison: anything new?
[16:58] <MikeMc> i mean the spacing for the RTTY - 450Hz
[16:58] <rjharrison> No wx is crap
[16:58] <MikeMc> jcoxon used different resistors
[16:58] <MikeMc> so i guess the spaacing isn't critical
[16:58] <rjharrison> Keen to launch
[16:59] <rjharrison> MikeMc yep you will have to adjust to suit
[16:59] <MikeMc> k
[16:59] <MikeMc> thanks
[16:59] <rjharrison> edmoore nothing till 7/8 nov at earliest
[16:59] <edmoore> ok
[16:59] <edmoore> shame
[17:00] <rjharrison> Bsically the different R values set the shift between 1 and 0 in rtty
[17:00] <rjharrison> MikeMc ^^^
[17:00] <rjharrison> The bigger the delta R the > the shift
[17:08] <edmoore> home time
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[17:26] <MikeMc> ok
[17:26] <MikeMc> that's easy enough
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[17:47] <Laurenceb> http://www.flickr.com/photos/edyson/3430536158/
[17:48] <SpeedEvil> shiny
[17:49] <Laurenceb> http://www.flickr.com/photos/edyson/3428377728/
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[18:36] <Laurenceb> http://code.google.com/p/wi2geo/
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[18:53] <jcoxon> evening all
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[19:27] <SpikeUK> ping jcoxon
[19:27] <jcoxon> hey SpikeUK
[19:27] <jcoxon> how can i help?
[19:28] <SpikeUK> Hey jcoxon! Did I read the log correctly, you are talking at the London Hackspace next week?
[19:29] <jcoxon> yes
[19:29] <jcoxon> thats the plan
[19:29] <jcoxon> they'll send an email around i think tonight
[19:30] <SpikeUK> Oh. OK - I know where I'll be next Wednesday evening :-) I'll be good to meet you at last
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[19:31] <jcoxon> great
[19:31] <jcoxon> :-)
[19:32] <SpikeUK> What will you be talking about or that secret ATM?
[19:32] <jcoxon> no no, isn't a secret
[19:32] <jcoxon> not too sure yet but i suspect a bit of the basic theory, some history and then some stuff on various projects going on
[19:33] <jcoxon> and how to get involved
[19:33] <jcoxon> but will keep it flexible
[19:35] <SpikeUK> Sounds interesting - I've got quite a few Moo cards left if you'd like them?
[19:35] <jcoxon> yeah that would be great
[19:35] <jcoxon> will set up a demo of my payload, radio and the server
[19:35] <SpikeUK> The Brighton HackSpace peeps have just started streaming on http://www.ustream.tv/channel/real-world-flocking---towards-and-open-ended-discourse
[19:36] <jcoxon> will fake the gps for a flight
[19:36] <SpikeUK> Sounds good!
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[19:37] <jcoxon> and i'm sure some stuff about trans-atlantic flight will appear as well
[19:38] <SpikeUK> Right! Really good stuff then. Thanks!
[19:39] <jcoxon> hehe
[19:55] <Laurenceb> nothings happening
[19:57] <Randomskk> woo my new pcb is now soldered up
[19:57] <Randomskk> soldering with metcal iron on a stereo microscope is so awesome
[19:57] <Randomskk> <3 cusf lab
[19:57] <SpikeUK> Laurenceb if you are talking about the feed - I just heard voices
[19:58] <SpikeUK> mind you, that's nothing new ;-)
[20:04] <Laurenceb> http://toukakoukan.smugmug.com/Trip/Ukraine/IMG3107/361756855_Ddb4A-O.jpg
[20:08] <Laurenceb> ooh people
[20:08] <SpikeUK> Love the t-shirt!
[20:08] <Laurenceb> hello there...
[20:08] <Laurenceb> no its dead again
[20:12] <Laurenceb> do they know we are listening to their conversation?
[20:13] <Laurenceb> the stream seems to be ignored completely
[20:13] <SpikeUK> BOO - no, nothing ;-)
[20:13] <Laurenceb> do they have irc?
[20:13] Action: Laurenceb doesnt have an account
[20:13] <Laurenceb> what on earth are they talking about anyway?
[20:14] <Laurenceb> lol
[20:15] <SpikeUK> Have you tried using the chat or Twitter window?
[20:16] <Laurenceb> you need an account
[20:17] <Laurenceb> hmm ok it works now
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[20:49] <jcoxon> :-( managed to blow my hacked scanner controller
[20:49] <SpeedEvil> :/
[20:51] <sbasuita> :|
[20:52] <jcoxon> oh well i've got another l293d so its cool
[20:52] <sbasuita> :\
[20:52] <sbasuita> :-)
[20:52] <jcoxon> i can make another h bridge
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[21:24] <Randomskk> anyone here use the burst1a.xls spreadsheet?
[21:46] <jiffe> I used it for the launch we have planned on sat
[21:46] <Randomskk> any idea where the numbers in the table at the bottom come from?
[21:46] <Randomskk> the burst diameter and Cd (?) ones
[21:47] <Randomskk> equally, did you actually have all the input values to hand, or did you try lots of different launch diameters to find some desirable output?
[21:47] <SpeedEvil> Cd is simple from physics
[21:48] <Randomskk> SpeedEvil: what is it?
[21:48] <SpeedEvil> you can pretty much assume it's an ideal sphere
[21:48] <SpeedEvil> burst diameter you get from the balloon datasheet
[21:49] <Randomskk> so there's no generic relationship between the balloon mass and the burst diameter, just gotta use that table?
[21:49] <jiffe> I adjusted diameter to optimize flight time to burst altitude
[21:49] <Randomskk> jiffe: it seems to me that most people actually want to know the launch diameter required to get some output, does that seem right?
[21:50] <SpeedEvil> Randomskk: the maker quotes a burst diameter
[21:50] <Randomskk> SpeedEvil: okay. what does Cd represent?
[21:50] <SpeedEvil> launch diameter can be easier to measure than launch lift
[21:50] <SpeedEvil> Coefficient of drag
[21:50] <Randomskk> okay.
[21:51] <SpeedEvil> http://en.wikipedia.org/wiki/Drag_coefficient
[21:51] <Randomskk> great, thanks.
[21:51] <SpeedEvil> It's if the balloon is round or square
[21:52] <Randomskk> I see. does that equally just get quoted by the manufacturer?
[21:52] <RocketBoy> The Cds were back calculated from totex/kaymont ascant data
[21:52] <RocketBoy> ascent
[21:53] <Randomskk> so essentially found by experiment?
[21:53] <RocketBoy> yes
[21:53] <Randomskk> okay, got it. thanks
[22:05] <natrium42> yellow
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[22:18] Action: natrium42 looks at DanielRichman
[22:19] Action: DanielRichman looks back
[22:19] <DanielRichman> WHAT IS IT?
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[22:21] <natrium42> HI :D
[22:22] <DanielRichman> HAI2U"
[22:22] <DanielRichman> oh man.
[22:22] <DanielRichman> shift fail.
[22:22] <natrium42> :0
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[22:58] <MikeMc> hello
[22:58] <Randomskk> hi
[22:59] <MikeMc> what's new?
[23:00] <DanielRichman> nothing's new. nothing's ever new
[23:00] <MikeMc> :(
[23:01] <SpeedEvil> My new belt hole is new.
[23:01] Action: SpeedEvil is on a diet.
[23:01] <SpeedEvil> But that's not really HA related.
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[23:02] <MikeMc> before long you'll need to use a watch strap
[23:03] <SpeedEvil> Not planning on going that far.
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[23:10] <fuzzylugnuts> Hi
[23:10] <MikeMc> hi fuzzylugnuts
[23:10] <fuzzylugnuts> my transcievers came in today
[23:10] <MikeMc> what transceivers?
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[23:11] <fuzzylugnuts> some radiometrix QPX1's 2w vhf with a built in dumb-modem
[23:11] <rjharr_pissed> hehe
[23:12] <rjharr_pissed> had a few beers
[23:12] <MikeMc> what are you going to use those for?
[23:12] <fuzzylugnuts> Yay!
[23:12] <fuzzylugnuts> drink some gin now
[23:12] <rjharr_pissed> and I'm still logged in at work
[23:12] <rjharr_pissed> Hey fuzzylugnuts
[23:12] <rjharr_pissed> MikeMc how is the NTX2 goign
[23:12] <MikeMc> lol just realised who that is
[23:12] <MikeMc> it is still in its nice padded box keeping warm
[23:12] <rjharr_pissed> lol
[23:12] <MikeMc> as i've been out all night till about 20 mins ago
[23:13] <rjharr_pissed> Yep those black foam boxes are good
[23:13] <fuzzylugnuts> my QPX1's landed at my feet today when the UPS guy tossed them up over the second floor railing against my apartment door. I was like... wtf.
[23:13] <MikeMc> yup
[23:13] <rjharr_pissed> assuming you got it from radio metrix
[23:13] <MikeMc> yeah
[23:13] <rjharr_pissed> Right I'm off to bed before I embarrase myself
[23:13] <rjharr_pissed> nights all
[23:13] <fuzzylugnuts> oh thats no fun
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[23:14] <MikeMc> good idea
[23:14] <fuzzylugnuts> MikeMc: what did you get?
[23:14] <MikeMc> NTX2
[23:14] <fuzzylugnuts> *looks it up*
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[23:15] <MikeMc> 434.65 MHz RF transmitter
[23:15] <fuzzylugnuts> ahhh yeah, that little one
[23:16] <fuzzylugnuts> fantastic radios
[23:16] <MikeMc> what country are you in?
[23:16] <fuzzylugnuts> usa
[23:16] <MikeMc> ahh
[23:16] <MikeMc> wouldn't be able to use the QPX1 over here
[23:16] <fuzzylugnuts> Yeah I know, limited to 10mw
[23:17] <MikeMc> yeah but 10mW will give hundreds of miles
[23:17] <fuzzylugnuts> Yep
[23:17] <fuzzylugnuts> all in how you use it
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[23:17] <MikeMc> which in our tiny country is more than enough
[23:17] <Laurenceb> hi
[23:17] <fuzzylugnuts> Hey
[23:17] <MikeMc> hi
[23:18] <fuzzylugnuts> I was after a decent data rate, too
[23:18] <MikeMc> why?
[23:19] <fuzzylugnuts> basically a wireless TTY to the balloon's flight computer
[23:19] <fuzzylugnuts> at 1200bps
[23:19] <MikeMc> for what purpose?
[23:21] <fuzzylugnuts> a few things. First it was just to see if I could do it, and turns out tis pretty easy. I had used a 500mw UHX1 to do it. Then I wanted to provide a launch vehicle that other groups can send there experiments up in, and have real time access to IOand ADCs
[23:22] <MikeMc> i see
[23:22] <fuzzylugnuts> so I'm using the phidget SBC to be the flight computer, which has a bunch of digital IO and ADCs on it.
[23:23] <fuzzylugnuts> was using gumstix
[23:25] <fuzzylugnuts> http://coyotefirecracker.selfip.com/
[23:25] <fuzzylugnuts> my projects are at the bottom
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[23:28] <MikeMc> nice
[23:28] <fuzzylugnuts> thanks
[23:29] <MikeMc> interesting stuff there
[23:30] <fuzzylugnuts> Thanks
[23:30] <fuzzylugnuts> it was a fun time
[23:30] <fuzzylugnuts> then I moved from that group I was doing the launches with
[23:30] <fuzzylugnuts> I'll be at a conference in july real close to them so I'm shipping my stuff out and doing a launch
[23:31] <MikeMc> cool
[23:31] <fuzzylugnuts> Do you launch too?
[23:32] <MikeMc> i've not done one but i;'m working on one at the moment
[23:32] <fuzzylugnuts> Cool
[23:32] <fuzzylugnuts> how are you going to do it?
[23:33] <MikeMc> Atmega328 as flight computer - Canon A560 and maybe also S400 cameras on servo tilt control
[23:33] <MikeMc> temp, pressure sensors
[23:33] <MikeMc> maybe also UV
[23:34] <MikeMc> Radiometrix NTX2 tx GPS co-ordinates from a Trimble LAssen IQ
[23:34] <MikeMc> SMS backup
[23:36] <MikeMc> that's it
[23:36] <MikeMc> pretty simple for launch 1
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[23:39] <Laurenceb> SpeedEvil: ping
[23:40] <MikeMc> pong
[23:41] Action: natrium42 slowlorises SpeedEvil
[23:42] <fuzzylugnuts> MikeMc: sorry for the delay. THat all sounds really cool. Are you having the AVR connected to the GPS and NTX1, or a direct connection between the GPS and the NTX1
[23:42] <MikeMc> AVR
[23:43] <MikeMc> to parse the data and pick out the relevant bits only
[23:43] <MikeMc> and also to log GPS, temp, pressure, etc. to an SD Card
[23:43] <fuzzylugnuts> Thats good
[23:43] <fuzzylugnuts> Cool : )
[23:43] <fuzzylugnuts> good luck with that
[23:44] <MikeMc> TY
[23:44] <MikeMc> i'll need it
[23:44] <MikeMc> lol
[23:44] <fuzzylugnuts> I tell you, its a real rush when you let go of your balloon and know you have to rely on something you built
[23:45] <fuzzylugnuts> if you ever want to get it back
[23:47] <fuzzylugnuts> and take pictures of the progress if you can, its great to see how it will evolve
[23:47] <fuzzylugnuts> *how it evolves
[23:48] <MikeMc> yeah
[23:49] <fuzzylugnuts> I cheat and use a commercially available SBC
[23:49] <fuzzylugnuts> http://www.trossenrobotics.com/p/phidgetSBC.aspx
[23:52] <MikeMc> i see
[23:55] <fuzzylugnuts> but it is the combination of everything I need in one nice package, so I use it.
[23:56] <MikeMc> yeah it looks like a neat solution
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[23:57] <fuzzylugnuts> alright, laters
[23:58] fuzzylugnuts (n=hush@c-68-34-212-42.hsd1.tn.comcast.net) left irc: "jackal pie and silver"
[23:58] <MikeMc> cya
[00:00] --- Fri Oct 30 2009