highaltitude.log.20080615

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[10:16] <jcoxon> morning edmoore
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[11:03] <edmoore> morning jcoxon
[11:05] <jcoxon> morning edmoore
[11:05] <jcoxon> sucide sunday
[11:06] <edmoore> already had some
[11:06] <jcoxon> good good
[11:06] <edmoore> tho don't have a wyverns ticket, sadly
[11:06] <jcoxon> oh you aren't missing out
[11:06] <edmoore> will see what can be done
[11:06] <jcoxon> wyverns is always rubbish
[11:06] <jcoxon> they just nick the money and go on holiday
[11:08] <edmoore> lol
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[12:26] <edmoore> so jcoxon, what's haooening atm?
[12:26] <edmoore> appenhing
[12:27] <edmoore> happening*
[12:27] <edmoore> keyboard fail.
[12:29] <jcoxon> ummm i've been doing a bit of work on the goliath
[12:29] <jcoxon> trying to work out how to attach the radio
[12:32] <jcoxon> the problem is that they don't bring out all teh lines
[12:38] <edmoore> arse poo
[12:41] <jcoxon> but the gps and gsm work amazingly
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[12:42] <jcoxon> also i found a spare usb port which i can easily tap
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[13:47] <Laurenceb> hi all
[13:50] <Laurenceb> edmoore: I was thinking about your rocket, found this- http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=1969966
[13:51] <Laurenceb> but I'm sure you can find some a lot cheaper
[13:51] <Laurenceb> just stick it on a lathe and you have your nosecone :P
[13:54] <edmoore> oh ebay wil have ptfe
[13:54] <edmoore> rs is ludicrously expensive for everything
[13:56] <Laurenceb> I'm only too aware
[13:57] <Laurenceb> do you need an explosives license for the motor?
[13:58] <edmoore> yep
[13:58] <Laurenceb> :-S
[13:59] <edmoore> storage requirements are fairly strict for the things
[13:59] <Laurenceb> I was reading
[13:59] <Laurenceb> it looks a right pain
[14:00] <Laurenceb> does a HAB count as storage?
[14:00] <edmoore> lol
[14:00] <edmoore> have a guess
[14:01] <Laurenceb> we.... are there seperate transport requirements?
[14:01] <edmoore> yes
[14:01] <Laurenceb> in which case a HAB is transport
[14:01] <edmoore> so there are various licensesw for storage and transport
[14:01] <Laurenceb> god its horrible
[14:01] <Laurenceb> might I suggest a boat launch?
[14:02] <edmoore> read the ukra website for the specifics pertaining to rocketeers
[14:02] <Laurenceb> k
[14:02] <edmoore> no it's a solved problem
[14:02] <Laurenceb> cool
[14:02] <edmoore> we've done it, just like every other rocketeer
[14:02] <edmoore> just gotta jump through a few hoops
[14:02] <edmoore> such is life
[14:05] <Laurenceb> what are you using? something like this? http://www.rocketstore.co.uk/shop/product.asp?numPageStartPosition=1&strPageHistory=cat&strKeywords=&strSearchCriteria=&PT_ID=180&MFR_ID=0&P_ID=951&btnProduct=More+Details
[14:05] <edmoore> returns an error
[14:06] <Laurenceb> ok its an ammonium perchlorate
[14:06] <Laurenceb> 2014Ns
[14:07] <Laurenceb> 1.6Kg... looks vaguely possible
[14:07] <edmoore> an ammonium perchloarate?
[14:07] <edmoore> what's a one of them?
[14:07] <Laurenceb> http://www.rocketstore.co.uk/shop/prodtype.asp?PT_ID=180&strPageHistory=cat
[14:08] <edmoore> oh, I'm not going to say on here how it's powered
[14:08] <Laurenceb> :P
[14:08] <edmoore> it is part of a competition....
[14:09] <Laurenceb> ice cream?
[14:09] <edmoore> damn
[14:11] <Laurenceb> fairdoos :P
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[17:26] <Laurenceb> hi akawaka
[17:28] <jcoxon> hey Laurenceb
[17:28] <jcoxon> seen this:
[17:28] <jcoxon> http://www.teslabs.com/meteotek08
[17:28] <Laurenceb> hi jcoxon
[17:29] <Laurenceb> yes, its on the wiki :P
[17:29] <Laurenceb> looks very neatly done
[17:29] <jcoxon> yeah
[17:29] <jcoxon> i don't think they've launched yet
[17:29] <jcoxon> but it looks good
[17:30] <Laurenceb> a bit heavy
[17:30] <Laurenceb> I would have avoided the aluminium
[17:30] <Laurenceb> I just went to maplins, bad idea
[17:31] <Laurenceb> spent 6 pounds :-(
[17:31] <Laurenceb> on a few sockets, v regs, caps and crystals
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[17:32] <jcoxon> yuk maplins
[17:33] <jcoxon> though if you need to get someting immediately
[17:34] <edmoore> then try somewhere else\
[17:35] <jcoxon> hehe
[17:35] <wickerwaka> thats a pretty impressive looking payload
[17:35] Nick change: wickerwaka -> akawaka
[17:36] <edmoore> link?
[17:37] <akawaka> the teslabs one
[17:37] <akawaka> oh: http://teslabs.com/meteotek08/
[17:37] <akawaka> my head is spinning, not sure if its the hangover, vicoden or both
[17:38] <Laurenceb> is dabs a good place to buy ram?
[17:39] <jcoxon> i often get pc bits from ebuyer
[17:39] <edmoore> is it spanish?
[17:40] <akawaka> so i was pretty much done building my radio
[17:40] <edmoore> google translate has done an awful job on spanish to english
[17:40] <akawaka> and accidentially connected it with the polarity inverted
[17:40] <Laurenceb> oh noes
[17:40] <akawaka> blew the transistors apart
[17:41] <akawaka> shifted the xtal from 11mhz to 24mhz
[17:41] <akawaka> and screwed up every other active component
[17:41] <akawaka> next time maybe a diode might be a good idea
[17:43] <Laurenceb> hmmm how do I find what sort of ram my laptop takes?
[17:43] <edmoore> crucial website
[17:43] <edmoore> has a ram finder thing
[17:43] <Laurenceb> k
[17:47] <Laurenceb> oh yes 4GB
[17:47] <Laurenceb> that should speed things up a bit
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[18:06] <Laurenceb> hmm only 60 pounds from ebuyer
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[18:17] <natrium42> Laurenceb, this would be nice for ground station :P --> http://www.trustedreviews.com/notebooks/review/2008/06/14/Asus-Eee-PC-901-20G-Linux-Edition/p1
[18:18] <Laurenceb> yes, fnoble has one
[18:18] <natrium42> with the intel atom chip?
[18:18] <Laurenceb> oh
[18:18] <Laurenceb> cool
[18:18] <natrium42> it's not out yet, i think
[18:18] <natrium42> the reviewers are a bit spoiled --> "With 1GB of RAM in support you can even have two or three programs open at any one time and not encounter any major problems unless you want to watch video, in which case it's best to close other programs - particularly memory heavy apps like Firefox and OpenOffice."
[18:19] <natrium42> please, 1GB is plenty
[18:19] <Laurenceb> is there a way to check what external display resolution are supported in ubuntu?
[18:19] <Laurenceb> I want to buy a big lcd, but need to check the native resolution is supported
[18:19] <natrium42> that's dependent on your graphics card
[18:20] <natrium42> ubuntu will work with any res as long as your gfx card is OK with it
[18:20] <Laurenceb> its an ati radeon express 1100 :-S
[18:20] <natrium42> i would check the docs for it
[18:20] <natrium42> bbl, food
[18:20] <Laurenceb> It says up to 1600*1200
[18:21] <Laurenceb> but I want to use 1680*1050
[18:21] <Laurenceb> cya
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[18:38] <Laurenceb> edmoore: have you managed to put the lassen iq into dynamic mode?
[18:47] <Laurenceb> I was just wondering if you had any code :P
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[20:47] <Laurenceb> arg
[20:47] <Laurenceb> remind me not to go to ##c
[20:48] <Laurenceb> natrium42: you about?
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[21:00] <Laurenceb> edmoore: you there?
[21:00] <edmoore> yo
[21:00] <Laurenceb> hi
[21:00] <Laurenceb> can you help me with some c?
[21:00] <Laurenceb> I'm trying to make a lassen iq interface
[21:01] <Laurenceb> basically I have incoming floats
[21:01] <edmoore> probably not given i've been barring, but i will try my slurred hardest
[21:01] <Laurenceb> and I want to turn them into floats from the individual bytes
[21:01] <Laurenceb> so... I was thinking memcpy
[21:02] <Laurenceb> but memcpy(&myfloat + n,&mybyte); wont work will it?
[21:02] <edmoore> I think I was much lower tech
[21:02] <Laurenceb> as that will point to n floats ahead, not n bytes
[21:02] <edmoore> just shift the bytes the appropriate amount, add them up, and cast them as a float
[21:03] <Laurenceb> requires more ram
[21:03] <edmoore> the luxury of arm
[21:03] <Laurenceb> but i guess I can afford 4 bytes
[21:03] <edmoore> if it's the same 4....
[21:03] <edmoore> as a routine it will proably be quite fast
[21:03] <Laurenceb> ooh good point
[21:04] <Laurenceb> I have a local copy of the data anyway
[21:04] <Laurenceb> as its interrupt driven
[21:04] <edmoore> yeah
[21:04] <Laurenceb> so I can screw with it as much as I want till its ready
[21:08] <Laurenceb> so it would be like (e.g.) myfloat | = 0xFF | (mybyte <<16) | 0xFF | 0xFF ; ?
[21:08] <Laurenceb> and so on
[21:09] <edmoore> why the two | 0xFF at the end?
[21:11] <Laurenceb> 32 bit variable
[21:11] <Laurenceb> erm
[21:11] <Laurenceb> woops
[21:12] <Laurenceb> so it would be like (e.g.) myfloat | = 0xFF<<24 | (mybyte <<16) | 0xFF<<8 | 0xFF ; ?
[21:12] <edmoore> yeah - i think that's the right idea. I have slight double vision so I can't really think it through
[21:13] <Laurenceb> hehe
[21:14] <Laurenceb> I'm thinking as theres no uart spare to talk to it and setup dynamic filter, I'll run a bit banged uart at startup, before turning on the various interrupts
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[21:33] <Laurenceb> edmoore: http://pastebin.com/m17e0c1f0
[21:33] <Laurenceb> ^ I went for a slightly different approach
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[21:44] <Laurenceb> done http://pastebin.com/m73f75c82
[21:45] <gerard_mp> hi
[21:46] <Laurenceb> yo
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[21:49] <gerard_mp> who is the author of landing spot prediction article in ukhas wiki?
[21:51] <Laurenceb> rocketboy
[21:52] <gerard_mp> do you know if he is usually in the chat?
[21:52] <Laurenceb> some times in the evening
[21:53] <gerard_mp> do you have his email or any form of contact?
[21:53] <Laurenceb> it depends, hes not around really often
[21:53] <Laurenceb> hmm
[21:53] <Laurenceb> to be honest I'm not sure if he'd be happy
[21:54] <gerard_mp> okok
[21:54] <Laurenceb> sorry
[21:54] <Laurenceb> but I'd be happy to answer any questions
[21:55] <gerard_mp> no matter ;)
[21:55] <gerard_mp> yes I have one
[21:55] <gerard_mp> I've seen you've pasted a source code for a tsip parser right?
[21:55] <Laurenceb> yes
[21:55] <Laurenceb> just wrote it, so not sure if it works
[21:56] <gerard_mp> I've bought a trimble for my high altitude project
[21:56] <Laurenceb> ok
[21:56] <gerard_mp> it comes with nmea and tsip
[21:56] <Laurenceb> do you have avrs ?
[21:56] <gerard_mp> my idea is to send all data in ascii, these way u can see it directly using a terminal program
[21:56] <gerard_mp> yes, I use atmega128 as flight computer
[21:57] <Laurenceb> ah are you from the spanish team
[21:57] <gerard_mp> yes
[21:57] <gerard_mp> meteotek08
[21:57] <Laurenceb> nice work
[21:57] <Laurenceb> very neat
[21:58] <gerard_mp> what I don't understand is why gps outputs without request the gps information. I can adjust output period (1s, 2s...) but I'd like to request it
[21:58] <Laurenceb> hmmm good point
[21:58] <gerard_mp> however it isn't an important fact
[21:58] <Laurenceb> I have found that annoying
[21:58] <gerard_mp> but would be nice to be able to request
[21:59] <Laurenceb> I've made an interrupt driven nmea and now tsip parser
[21:59] <gerard_mp> yes, I've already seen it
[21:59] <Laurenceb> to try and get things to work with less ram use
[21:59] <Laurenceb> so no need for buffers
[21:59] <gerard_mp> yes
[21:59] <gerard_mp> nmea is good if you need ascii
[22:00] <gerard_mp> in my case would be useful (some data will need to get converted)
[22:00] <Laurenceb> I want to be able to configure the trimble reciever to use dynamic filtering, so I'm going to write a bit banged uart routine that can run just before interrupts are turned on
[22:01] <Laurenceb> as my uart on the mega168 is used to talk to the radio modem
[22:01] <gerard_mp> you share uart?
[22:01] <Laurenceb> yes
[22:01] <Laurenceb> tx ---> radio gps --> rx
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[22:02] <gerard_mp> hmm yes you're right
[22:02] <Laurenceb> brb, cooking
[22:02] <gerard_mp> in my case I need bidirectional uart (gps need to be configured, I put 5s output delay and only the main message containing position data=
[22:03] <Laurenceb> you could use a bit banged uart to do that
[22:03] <gerard_mp> but mega128 is good, it comes with 2 uarts
[22:03] <Laurenceb> ah of course :P
[22:04] <Laurenceb> you also have lots of ram do do things like a FAT filesystem
[22:04] <gerard_mp> yes
[22:04] <mc-> Laurenceb, how about using ints rather than floats?
[22:04] <mc-> skip the dec point
[22:04] <gerard_mp> I wrote a fat driver for my mp3 player, but only for reading
[22:04] <Laurenceb> for latitude?
[22:05] <mc-> yes
[22:05] <mc-> that what I do on a pic
[22:05] <Laurenceb> what 60 miles or so resolution?
[22:05] <mc-> multiply up by 1000 or whatever
[22:05] <Laurenceb> oh
[22:05] <gerard_mp> I'll write directly to sd, and then I'll outpu its content as a file in the computer to convert it
[22:09] <mc-> I start with the lat/lon as a string, and remove the dec point.
[22:10] <Laurenceb> sure, but AVR is better at handling floating point
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[22:13] <gerard_mp> Laurenceb: which project are u involved in?
[22:13] <Laurenceb> well the aerosol sampling project, high altitude glider project, and avr based parafoil
[22:13] <gerard_mp> good
[22:14] <gerard_mp> what's aerosol sampling project about?
[22:14] <Laurenceb> its a research project to obtain samplies of sub micro dust in the stratosphere
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[22:15] <gerard_mp> hmm good
[22:16] <Laurenceb> there is a large research group looking at aerosols at the university here
[22:17] <gerard_mp> do they have any website?
[22:18] <Laurenceb> http://www.atm.ox.ac.uk/group/eodg/eodg_people.html
[22:18] Action: Laurenceb looks at photo ... what a bunch of dorks
[22:20] <gerard_mp> hehe
[22:21] <Laurenceb> they're not as bad as they look
[22:24] <gerard_mp> :)
[22:25] <gerard_mp> i'll be out for a while, see u later
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[23:05] <gerard_mp> I'm here again
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[00:00] --- Mon Jun 16 2008