highaltitude.log.20080814

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[00:08] <kornholijo> \
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[00:42] <Laurenceb> hi all
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[01:23] <SpeedEvil> lo
[01:23] <SpeedEvil> bye
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[08:23] <jcoxon> morning
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[08:27] <icez> morning jcoxon
[08:33] <icez> and edmoore
[08:33] <icez> and everyone else :P
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[08:36] <SpeedEvil> lo.
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[08:47] <jcoxon> morning icez
[08:48] <icez> how are things?
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[08:55] <edmoore> icez: thank you
[08:55] <edmoore> you too
[08:56] <icez> :P
[08:56] <icez> well, yeah, 1 am does count as morning
[08:57] <Shanuson> 10 am here
[08:59] <edmoore> Shanuson: where are you?
[08:59] <edmoore> france?
[09:00] <icez> *hides*
[09:00] <Shanuson> germany
[09:01] <Shanuson> icez should be somewhere in west america
[09:05] <icez> arizona
[09:10] <Shanuson> :)
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[10:33] <Laurenceb> hi everyone
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[11:13] <jcoxon> morning all
[11:13] Action: jcoxon is helping his sister through ucas clearing
[11:13] <jcoxon> oh the joys
[11:18] <edmoore> a-level results day?
[11:18] <jcoxon> yup
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[12:03] <edmoore> hi Laurenceb
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[17:01] <jcoxon> hey all
[17:01] <icez> hey
[17:01] <jcoxon> hey icez
[17:05] <jnd> hey
[17:05] <jcoxon> hey jnd
[17:05] <jcoxon> hehe
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[17:21] <icez> oh buggers
[17:21] <icez> HP says OpenVMS licenses are "free" for hobbyists, but you just need to be a member of one of the user groups...which only runs from 50-500$
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[21:24] <Laurenceb> hi all
[21:24] Action: Laurenceb just fired up the parafoil board for the first time with all the hardware
[21:24] <Laurenceb> the leds are flashing correctly
[21:27] <Laurenceb> aha rs232 as well
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[21:35] <Laurenceb> SpeedEvil: you about?
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[23:30] <fergusnoble> hello
[23:30] <fergusnoble> edmoore: got the mould up to a mirror finnish :)
[23:30] <fergusnoble> *finish
[23:30] <edmoore> cool. what did you use?
[23:30] <fergusnoble> its sexy
[23:31] <fergusnoble> just every grade of wet and dry from 180 to 1000
[23:31] <fergusnoble> and some autosolv
[23:31] <fergusnoble> and two days of my life
[23:31] <edmoore> yeah that's the shit
[23:31] <edmoore> or toothpaste
[23:32] <edmoore> oh don't give me that, I had a 10 solid hours today of packing parachutes into mortars for next week's wind tunnel tests
[23:32] <fergusnoble> tbh it could get a little better if we now moved onto a finer polising compound
[23:32] <edmoore> it was about the most sould destroying thing I've done since machining 400 tractor trailor locks
[23:32] <fergusnoble> but its beyond good enough
[23:33] <fergusnoble> ah hardcore
[23:33] <fergusnoble> hows it all going?
[23:33] <Laurenceb> what you polishing?
[23:33] <edmoore> not bad, playing with some supersonic drogues tomorrow
[23:33] <edmoore> attacking them with a soldering iron to make them stable supersonically, anyway
[23:33] <Laurenceb> you have acess to a supersonic wind tunnel?
[23:34] <fergusnoble> Laurenceb: the mould for the composite rocket
[23:34] <Laurenceb> carbon fibre?
[23:34] <fergusnoble> some kevlar too but maily yeah
[23:34] <Laurenceb> sounds sweet
[23:34] <fergusnoble> yeah its really cool
[23:34] <fergusnoble> hopefully we can get something made in it before the international rocket day
[23:34] <Laurenceb> fergus: I used brasso to polish up the aerosol collector
[23:35] <Laurenceb> but yeah, grades of wet and dry before that, spinning it on a lathe where possible
[23:35] <fergusnoble> yeah polishing is hard work
[23:36] <fergusnoble> esp when you find a small scratch and realise you have to go back to 600 grit and work it back up from there
[23:36] <Laurenceb> I only managed a day on the sampler before I got bored
[23:36] <Laurenceb> he, I tried to clean it with the wrong solvent
[23:37] <akawaka> nothing fun about molding anything
[23:37] <Laurenceb> its got to be more fun than installing worktops
[23:38] <Laurenceb> which is what I've been attempting to do for the past few days... had to resort to the old school alu joint strips
[23:39] <fergusnoble> yeah, its quite rewarding when its done
[23:39] <akawaka> what material are you molding?
[23:39] <fergusnoble> cant wait to try it out but we cant get hold of the special ptfe release agent for a week
[23:40] <fergusnoble> akawaka: carbon and kevlar prepreg
[23:40] <Laurenceb> release agent?
[23:40] <Laurenceb> ah stops it sticking?
[23:40] <fergusnoble> yeah
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[23:40] <fergusnoble> you just put on a thin coat and it deposits a thin layer of teflon on the surface
[23:40] <Laurenceb> groovy
[23:41] <fergusnoble> will try and take some pics but i only have a rubbish camera
[23:41] <Laurenceb> you can pick up something good for £40 now
[23:43] <Laurenceb> this sucks, my rs232 level convertor only runs up to 9600 baud
[23:43] <Laurenceb> are bc108 transistors really that slow?
[23:43] <fergusnoble> i dont know
[23:44] <fergusnoble> why not use the max3233?
[23:44] <fergusnoble> its got internal caps so its small, and you can get free samples
[23:44] <Laurenceb> its on veroboard
[23:44] <Laurenceb> oh neat
[23:44] <fergusnoble> they do a dip version
[23:44] <Laurenceb> I'll have to get some
[23:46] <fergusnoble> sorry i mean max3232
[23:46] <Laurenceb> ok
[23:47] <Laurenceb> hmm whats the transition frequency?
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[23:47] <fergusnoble> i dont know, goes up to 120kbs
[23:47] <fergusnoble> so should be fast enough for most stuff
[23:47] <Laurenceb> sorry - of a transistor I meant
[23:48] <Laurenceb> just reading the bc108 datasheet
[23:49] <akawaka> are there any good veroboard layout tools?
[23:49] <akawaka> or stripboard, or just perf board
[23:50] <fergusnoble> ok, i was wrong again, the 3232 neads external caps, the 3235 doesnt
[23:50] <fergusnoble> akawaka: i use a whiteboard marker on a bit of board
[23:51] <fergusnoble> :)
[23:51] <fergusnoble> it would be good if there was a program that could turn a schematic into a layout though
[23:52] <akawaka> yeah
[23:52] <akawaka> i always end up sticking stuff on the board for it looks nice
[23:52] <akawaka> and then realizing everything is on the wrong side of the ic's
[23:52] <fergusnoble> yeah ive done that so many times
[23:53] <akawaka> not sure it really matters
[23:53] <fergusnoble> i guess algortihmically it should be quite easy for a comupter to come up with a good layout
[23:53] <akawaka> i think i'm just procrastinating
[23:53] <fergusnoble> or at least a lot easier than pcb autorouting
[23:53] <akawaka> well the normal layout tools like eagle should be able to do it without much modification i would imagine
[23:54] <fergusnoble> yeah, its a shame there are no good open pcb tools
[23:57] <akawaka> well the problem is all the computer science kids learn about pathfinding, graph organizing, etc
[23:57] <akawaka> all the ee students learn how to use the big layout tools
[23:57] Action: Laurenceb learns to burn his fingers
[23:58] <Laurenceb> dropped my soldering iron on the palm of my hand earlier
[00:00] --- Fri Aug 15 2008