highaltitude.log.20090409

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[08:19] <jcoxon> morning all
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[11:50] <Laurenceb> yo
[11:50] <shellevil> maybe.
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[11:55] <Laurenceb> the sparkfun front page comment is very interesting
[11:56] <Laurenceb> they seem to miss the point that some open source licences like the GPL is just as bad as patents
[11:56] <Laurenceb> just in the opposite direction
[11:57] <Laurenceb> truly "free" IP would imply no restrictions
[11:59] <Laurenceb> like freeBSD
[12:05] <shellevil> free IP isn't legal in some places
[12:06] <shellevil> you can't in some places place stuff in the public domain
[12:07] <shellevil> tl;dr
[12:08] <Laurenceb> places as in geographically?
[12:08] <shellevil> legal jurisdictions
[12:09] <Laurenceb> that doesnt sound likely
[12:10] <Laurenceb> whats the problem? liability?
[12:10] edmoore (n=edmoore@pomegranate.chu.cam.ac.uk) left irc:
[12:11] <shellevil> no - IIRC in the UK (for example) you can't disclaim copyright.
[12:11] <Laurenceb> thats daft
[12:11] <shellevil> You can say 'anyone can do anything they like with this - but this isn't quite teh same notion as public domain.
[12:11] <Laurenceb> so you can only say you dont care about it?
[12:12] <shellevil> pretty much
[12:12] <shellevil> And at least you get warning with GPL
[12:13] <shellevil> With patents, you can write/design something completely clean-sheet in your basement, and infringe hundreds of patents you've never heard of.
[12:13] <Laurenceb> grrr stupid legal systems
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[12:13] <shellevil> And can't find out what you're infringing without spending tens or hundreds of thousands.
[12:14] <shellevil> I wouldn't be at all surprised to learn that your glider infringes several, forex.
[12:15] <shellevil> Yay.
[12:15] Action: shellevil haz pazzport!
[12:17] <Laurenceb> nice
[12:17] <Laurenceb> emigrate to sealand
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[12:20] <shellevil> really just want it for driving license.
[12:20] <shellevil> well - and bank account
[12:21] <Laurenceb> you can use a birth certificate
[12:21] <shellevil> nope
[12:21] <shellevil> or I dunno, maybe
[12:22] <shellevil> not for driving license anyway
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[12:22] <Laurenceb> I dont think so
[12:22] <Laurenceb> not that I have a license
[12:23] <Laurenceb> hmm http://www.edn.com/blog/1470000147/post/450043045.html
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[12:23] <Laurenceb> hi mc-
[12:24] <mc-> hi lb
[12:24] <shellevil> Laurenceb: it is in fact required these days to take your passport to your driving theory test, unless you have a photocard provisional license - which I don't.
[12:25] <Laurenceb> dont you have a car?
[12:25] <shellevil> Complicated.
[12:27] <shellevil> I haven't had a car of my own - for various reasons, and have been driving my mum around for hte past 5-6000 miles, as she was finding it difficult.
[12:27] <shellevil> And with the time spent caring for her, and not having a car, there has been no pressing reason to get my license.
[12:27] <shellevil> Unfortunately, I've now inherited the car (well, when probate (well - not really in scotland, but)), and need a license.
[12:32] <shellevil> On a slightly electronics related note, the new passport has an actual visible enamelled copper wire coil and chip.
[12:35] <Laurenceb> gtg, cya
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[12:37] <mc-> cya
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[20:54] <hallam> hey y'all
[20:54] <hallam> jcoxon: what happened to Zeusbot yesterday?
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[21:53] <Laurenceb> yellow
[21:56] <hallam> fuschia
[21:59] <stilldavid> cerulean
[22:02] <Laurenceb> how goes the HAC modules?
[22:03] <stilldavid> I didn't have time to play with them last night, other than hook one up enough to get a serial number out of it
[22:03] <stilldavid> I got home late, and didn't have the oomph to look up pinouts for serial lines, etc...
[22:04] <stilldavid> also: have one right here, and the rf unit is pretty well covered by the cage.
[22:06] <Laurenceb> yeah, doesnt matter then
[22:07] <Laurenceb> but it does use an AVR ?
[22:07] <stilldavid> 4 points to desolder, we'll see how adventurous I feel tonight
[22:07] <stilldavid> yes, there's an AVR on there.
[22:07] <stilldavid> 32 pin, about 8mm square or so
[22:07] <Laurenceb> hmm I'd be nterested in getting some to try hacking
[22:08] <Laurenceb> depends if they set the write protect bit...
[22:08] Action: stilldavid knows next to nothing about AVRs
[22:08] <stilldavid> anything I can test?
[22:09] <Laurenceb> I dont think the spi is broken out
[22:09] <Laurenceb> thanks for the offer anyway
[22:09] <Laurenceb> - you need spi to connect a programmer
[22:10] <stilldavid> spi as in the 2-wire serial spec?
[22:10] <Laurenceb> three wire + /ss
[22:10] <Laurenceb> your probably thinking of I2C :P
[22:11] <stilldavid> heh, yup. I've worked a fair amount with i2c, never spi...
[22:16] <Laurenceb> I strongly suspect it uses the chipcon IC under that cover, the specs seem a bit too good, but they could be adding coding gain. I found another chinese manufacturer with almost identical modules who definately use the CC1100
[22:16] <Laurenceb> it may have been the same guys under a differnet name
[22:17] <Laurenceb> bbl
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[22:29] <jcoxon> hallam, zeusbot issues?
[22:29] <hallam> no log for yesterday
[22:30] <jcoxon> oh strange
[22:30] Action: hallam suspects black helicopters
[22:30] <jcoxon> hmmm
[22:30] <natrium42> maybe zeusbot got busted in the raids
[22:30] <jcoxon> there seems to bea log
[22:30] <jcoxon> be*
[22:31] <hallam> oh weird, it's there now
[22:31] <hallam> but I was definitely getting a 404 earlier
[22:31] <jcoxon> oh i was playing earlier
[22:31] <jcoxon> doing a bit of archiving
[22:31] <jcoxon> so perhaps then
[22:31] <hallam> no worries :)
[22:35] <jcoxon> http://news.bbc.co.uk/1/hi/sci/tech/7990595.stm
[22:37] <natrium42> nice
[22:37] <jcoxon> good old BLAST
[23:11] <Laurenceb> what was discussed yesterday?
[23:11] <Laurenceb> :P
[23:17] <natrium42> hehe
[23:17] <natrium42> i have the logs
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[23:23] <Laurenceb> hmm "50mm 1/3" C-mount" which is the focal lenght and which is the aperture?
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[23:25] <stilldavid> 50mm is focal length, 1/3 is aperture. what's the camera?
[23:26] <Laurenceb> http://open.grcnz.com/trac/low-cost-altimetry this - edmoore found it
[23:34] <stilldavid> that's an interesting theory - I'd imagine it'd have to have a gyro in there too to compensate for tilting
[23:35] <Laurenceb> yeah
[23:35] <Laurenceb> its good enough for landing approach on a return vehicle
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[23:36] <stilldavid> and I'd imagine (and it looks like from their data) that it's more accurate as it's closer to the ground
[23:36] <Laurenceb> yeah
[23:36] <Laurenceb> I think a shorter focal lenght with larger aperture would work better
[23:37] <Laurenceb> at least when I crunched the numbers I got a different combination
[23:37] <stilldavid> I'm not sure that the 1/3 is the aperture in that case.
[23:37] <Laurenceb> yeah
[23:37] <Laurenceb> the bistatic gps is interesting
[23:37] <Laurenceb> very simple way to do it - just a shielded ant
[23:42] <Laurenceb> what happens to ball bearing units at low temperatures?
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[23:48] <natrium> bah
[23:48] <natrium> stupid connection
[23:49] <Laurenceb> cya all
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[00:00] --- Fri Apr 10 2009