highaltitude.log.20060824

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[08:00] <Sqeeb> hi
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[09:03] jcoxon (n=jcoxon@85-210-21-200.dsl.pipex.com) joined #highaltitude.
[09:04] <jcoxon> morning all
[09:04] <jcoxon> good luck phatmonkey with your results!
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[12:30] <phatmonkey> hey jcoxon!
[12:30] <phatmonkey> whee, 4 A*s 4 As and 3 Bs
[12:30] <phatmonkey> pretty good
[12:34] <jcoxon> congratulations
[12:40] <phatmonkey> my chute came through this morning too
[12:40] <phatmonkey> woah, it's huge
[12:40] <phatmonkey> and they sent me an extra 24" chute for some reason
[12:40] <phatmonkey> ... not complaining i guess, hehe
[12:41] <phatmonkey> i asked for a drogue attachment, i guess they mistook that for a drogue attachment and a drogue chute
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[14:55] <jcoxon_> wow 11 people
[14:56] <defy> hey guys :)
[14:56] <jcoxon_> hey defy
[14:58] <defy> i managed to make my auto pilot to manual control servo switcher box thingy for less than $10
[14:58] <jcoxon_> :-)
[14:58] <defy> can you take over manual control of your car at all jcoxon?
[14:58] <Tiger^> http://www.continentalctrls.com/index.php?option=content&task=view&id=19
[14:59] <jcoxon_> defy, ummm well sort of, i can kill the program through the radio link
[14:59] <jcoxon_> thats if it actually worked :-p
[14:59] <jcoxon_> still writing code
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[14:59] <jcoxon_> though the weather is so horrible that it doesn't really matter as i can't take it outside
[15:00] <defy> =/
[15:00] Nick change: jcoxon_ -> jcoxon
[15:00] <jcoxon> having some issues interfacing with the pwm driver
[15:01] <jcoxon> Tiger^, wow, thats cool
[15:01] <Tiger^> jcoxon: yeah, ultra cool even
[15:01] <jcoxon> cost?
[15:01] <Tiger^> dunno
[15:27] <phatmonkey> jcoxon, how's coding going?
[15:28] <jcoxon> hmmmmm :-(
[15:28] <phatmonkey> defy, i saw that thing, what's the link?
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[15:28] <jcoxon> i'm getting there, having a few isseus with actually talking to the servos
[15:28] <phatmonkey> the code in the car branch at the moment should be able to steer a car
[15:28] <jcoxon> cool
[15:28] <jcoxon> i've written a little bit - a really basic test
[15:28] <phatmonkey> this parachute is fantastic. £30 including shipping
[15:29] <jcoxon> however am having issues getting the servos moving
[15:29] <jcoxon> phatmonkey, wow
[15:29] <phatmonkey> from the US
[15:29] <phatmonkey> really nice quality
[15:29] <phatmonkey> just ned to figure out a way to stow it in the glider now
[15:29] <phatmonkey> what setup do you suggest for an uncontrolled payload?
[15:30] <phatmonkey> i have everything i need for that except batteries and maybe a camera
[15:30] <phatmonkey> oh, and radio :/
[15:30] <phatmonkey> i'll need to chat to rocketboy about that
[15:34] <jcoxon> hey a1fa , gregj and Sqeeb
[15:34] <jcoxon> welcome to #highaltitude
[15:35] Action: jcoxon has a terrible memory so if he has said hi before ignore him
[15:35] <phatmonkey> join the club
[15:48] <phatmonkey> aaaaahhhhhhhhh!
[15:48] <phatmonkey> that explains the little chute
[15:48] <phatmonkey> http://spherachutes.com/
[15:49] <phatmonkey> hee hee, cool
[15:49] <phatmonkey> wonder what i can do with a little chute....
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[17:08] <jcoxon> i think i might go crazy
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[17:17] <jcoxon> hey all
[17:17] <icez> hey
[17:17] <jcoxon> could someone explain these 2 lines to me of C code:
[17:17] <jcoxon> for ( i=0; i<nchans; ++i ) chans[i] = atoi(test[1+i]);
[17:17] <jcoxon> if ( write(fd, chans, nchans) != nchans ) return 1;
[17:17] <jcoxon> actually you'll need 4 lines
[17:17] <jcoxon> unsigned char chans[16];
[17:17] <jcoxon> int i, nchans = argc-1;
[17:17] <jcoxon> for ( i=0; i<nchans; ++i ) chans[i] = atoi(test[1+i]);
[17:17] <jcoxon> if ( write(fd, chans, nchans) != nchans ) return 1;
[17:17] <jcoxon> i pretty much get it all
[17:18] <jcoxon> it takes the commandline argument and after a bit of processing writes it to fd
[17:19] <icez> looks like this sets chans char by char, and writes chans too fd of nchans length
[17:19] <jcoxon> does it also write char by char to fd?
[17:19] <icez> nchans being a maximum set by the user
[17:19] <jcoxon> hmmm
[17:19] <icez> well..it writes chans char by char until nchans
[17:20] <icez> if nchans is 3, and i have abcde it'll write until abc
[17:20] <jcoxon> right
[17:20] <jcoxon> i think i now see where i'm going wrong
[17:21] <icez> and write() returns the number of bytes (nchans) written if successful
[17:22] <jcoxon> this program takes the 2 numbers given in the command and inputs them into the servos
[17:22] <jcoxon> i instead want to use 2 ints from my software
[17:35] <jcoxon> fixed it!
[17:38] <phatmonkey> hehe
[17:38] <phatmonkey> sounds like you're having fun
[17:38] <jcoxon> i'm so close to actually testing
[17:39] <jcoxon> now my drive servo is being weird
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[19:07] <jcoxon> oops
[19:09] <jcoxon> took nomad for a little test spin
[19:09] <jcoxon> she got a little wet
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[19:24] <icez> :/
[19:34] <phatmonkey> whoops!
[19:34] <phatmonkey> hi rocketboy
[19:37] <phatmonkey> yay!!
[19:37] <phatmonkey> my ibook battery is being recalled
[19:37] <phatmonkey> new battery ftw!
[19:44] <icez> it'll blow up like dells?
[19:44] <icez> :P
[19:47] <phatmonkey> i have to return the old battery *after* they send the new one
[19:47] <phatmonkey> i might just keep it as a blowupable spare...
[19:50] <phatmonkey> what the fuck
[19:50] <phatmonkey> i don't believe it
[19:50] <phatmonkey> they've just changed the terms for replacing batteries
[19:50] <phatmonkey> mine isn't there anymore :(
[19:51] <phatmonkey> heh, http://www.cpsc.gov/cpscpub/prerel/prhtml06/06245.html still has mine on it
[19:52] <phatmonkey> i wonder if there are any cheap batteries on ebay i can replace for new ones
[19:52] <phatmonkey> ... sneaky
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[21:13] <phatmonkey> jcoxon, how's the coding going?
[21:14] <phatmonkey> i'm think i'm going to start with the ultra-simplification of the glider code
[21:14] <phatmonkey> i might write my own NMEA parser, or at least copy some code from gpsd
[21:14] <phatmonkey> one less thing to go wrong
[22:33] <jcoxon> hey ben
[22:35] <phatmonkey> hey
[22:35] <jcoxon> right well i'll learnt a lot from the test run i did earlier
[22:35] <jcoxon> :-p
[22:35] <jcoxon> shouldn't let gumstixs get wet :-[
[22:35] <jcoxon> (don't worry it works still)
[22:36] <phatmonkey> yikes
[22:36] <phatmonkey> ibook battery recall... check yours is included
[22:36] <phatmonkey> nice new battery time :D
[22:36] <jcoxon> just am
[22:36] <jcoxon> where is the site?
[22:37] <phatmonkey> https://support.apple.com/ibook_powerbook/batteryexchange/
[22:37] <phatmonkey> they're getting really hammered hard... you might not get through
[22:38] <phatmonkey> 4 to 6 weeks to arrive... what
[22:38] <phatmonkey> well i'm still going to use my blowupable battery
[22:38] <phatmonkey> hehe
[22:38] <jcoxon> yeah i just noticed
[22:38] <jcoxon> well i've never noticed an issue with the battery
[22:38] <jcoxon> i've had mine for 2 years and it still has a good life
[22:39] <phatmonkey> i'm debating whether to keep the old one as a spare
[22:42] <jcoxon> gonna have to rearrange nomad
[22:47] <jcoxon> i'm worried about the accuracy of just using gps
[22:47] <jcoxon> it'll be fine in the air but on the ground is another issue
[22:47] <phatmonkey> using a waypoint system over a reasonably large area should be fine
[22:47] <phatmonkey> because it's not trying to work out exact positions
[22:47] <phatmonkey> it's just working out the heading to the next waypoint
[22:48] <phatmonkey> which doesn't need to be accurate
[22:48] <jcoxon> hmmmm
[22:48] <phatmonkey> we'll have to see
[22:48] <phatmonkey> it might need some smoothing out
[22:48] <jcoxon> yeah
[22:48] <jcoxon> i need to rebuild nomad :-p
[22:49] <jcoxon> i'm away for the weekend so i'll do it next week
[22:49] <phatmonkey> okay
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[22:49] <jcoxon> i think i'm going to bite the bullet and buy some stuff for it
[22:52] <phatmonkey> shock! horror!
[22:53] <jcoxon> i know!
[22:55] <jcoxon> though i plan to also start work on pegasus IV
[22:55] <phatmonkey> shall we tag my first flight and pegasus together?
[22:55] <jcoxon> ummm, will have to get back to you about that
[22:56] <phatmonkey> i want to do an uncontrolled flight
[22:56] <phatmonkey> ok
[22:56] <jcoxon> have to see how the plans go
[22:56] <jcoxon> its good to do a dual launch
[22:56] <phatmonkey> redundancy!
[22:59] <jcoxon> how heavy is your payload?
[22:59] <phatmonkey> it would probably be rather light
[22:59] <phatmonkey> 1kg?
[22:59] <phatmonkey> i have a huge parachute we can use
[22:59] <phatmonkey> 60"
[22:59] <jcoxon> how about a single balloon
[22:59] <jcoxon> 2 payloads
[22:59] <jcoxon> so a train
[22:59] <phatmonkey> a big single balloon would be fine wouldn't it?
[23:00] <phatmonkey> yeah
[23:00] <jcoxon> but both be comms modules
[23:00] <jcoxon> just one controls cutdown
[23:00] <phatmonkey> yes
[23:01] <phatmonkey> and let's make sure we don't use the same code on both
[23:01] <phatmonkey> so if there's a bug in one... it won't kill the other
[23:02] <jcoxon> oh yeah
[23:02] <jcoxon> i plan to have a simple system
[23:02] <jcoxon> i'm not going to have radio i reckon
[23:03] <phatmonkey> i want radio!
[23:03] <jcoxon> go for it
[23:03] <jcoxon> i'll have a beacon probably - thats all
[23:03] <jcoxon> i'll leave the radio up to you then :-p
[23:03] <phatmonkey> but... i need gps, phone and radio
[23:03] <phatmonkey> and i only have two serial ports at the moment
[23:04] <phatmonkey> maybe i should get in touch with dave hylands about relaying the robostix serial ports over i2c
[23:04] <jcoxon> he likes a challenge
[23:04] <jcoxon> hmmm on my GPSstix i2c is labelled as NSSP
[23:04] <jcoxon> though hte lines are marked as SCL and SDA
[23:04] <phatmonkey> he said he was thinking about it
[23:04] <phatmonkey> i shall mail him right now!
[23:06] <jcoxon> though i can't do much till i get some solder wick
[23:06] <jcoxon> need to unplug these holes
[23:07] <phatmonkey> what sort of container's best for the balloon?
[23:07] <phatmonkey> i'm thinking a tupperware box with polystyrene on the inside
[23:07] <phatmonkey> nice and solid
[23:07] <jcoxon> ?
[23:07] <jcoxon> the payload you mean?
[23:07] <phatmonkey> oh, yeah
[23:07] <phatmonkey> haha
[23:08] <jcoxon> yeah that should work
[23:08] <jcoxon> i'm going for a reusuable, modular design
[23:09] <jcoxon> i'll be able to explain more after i actually plan it
[23:09] <jcoxon> (on the train tomorrow to edinburgh)
[23:11] <phatmonkey> ok
[23:12] <jcoxon> i'm reckoning though:
[23:13] <jcoxon> gumstix,gpsstix, nokia (ttyS0), i2c sensors, 1 camera
[23:13] <jcoxon> though i'm tempted not to even fly the camera
[23:13] <phatmonkey> it'll be interesting comparing data
[23:18] <jcoxon> hmmm, i sort of want an i2c prebuilt board
[23:19] <jcoxon> where i can wack some sensors on
[23:20] <phatmonkey> robostix? ;)
[23:20] <jcoxon> nah
[23:24] <jcoxon> right well i'm off to bed
[23:24] <jcoxon> will chat next week
[23:24] <jcoxon> byeeeee
[23:24] jcoxon (n=jcoxon@81-179-115-51.dsl.pipex.com) left irc: "I'm Elivized !"
[23:24] <phatmonkey> i'd better get some snooze too
[23:24] <phatmonkey> night
[23:26] <kc0wys> cya
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[00:00] --- Fri Aug 25 2006