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[09:20] <edwardmoore> hi jcoxon
[09:24] <edwardmoore> wakeup
[09:26] <jcoxon> hey edwardmoore
[09:26] <jcoxon> i'm awake1
[09:26] <edwardmoore> :)
[09:26] <edwardmoore> how goes it?
[09:27] <jcoxon> trying to sort out where zeusbot is going to move to when the cancel my account
[09:27] <edwardmoore> you're new expensive server?
[09:27] <edwardmoore> your*
[09:27] <edwardmoore> maybe the very slow linux box!
[09:27] <jcoxon> hehe
[09:27] <jcoxon> nah i don't have a computer always online
[09:28] <jcoxon> was going to use a free shell account
[09:28] <edwardmoore> if you want to prolong it 3 years you can stick it on mine
[09:29] <jcoxon> thanks,
[09:29] <jcoxon> would be an easy transfer that way
[09:29] <edwardmoore> yeah
[09:29] <edwardmoore> do i have to email srcf?
[09:30] <jcoxon> just need to copy over the config file as they already have eggdrop
[09:30] <jcoxon> nah
[09:30] <edwardmoore> ok well we can do it when i pop down today or tomorow?
[09:30] <jcoxon> literally place my eggdrop conf and run the program
[09:30] <jcoxon> yup
[09:31] <jcoxon> when do you want to come down?
[09:31] <edwardmoore> i have a lax garden party this afternoon.
[09:31] <edwardmoore> so perhaps this evening?
[09:31] <jcoxon> trinity
[09:31] <edwardmoore> oh yeah
[09:32] <edwardmoore> maybe tomorrow then
[09:32] <jcoxon> i'm free from 4 till 7
[09:32] <jcoxon> or tomorrow afternoon sometime
[09:32] <jcoxon> brb
[09:33] <edwardmoore> ok
[09:39] <jcoxon> back
[09:39] <edwardmoore> coolio
[09:40] <jcoxon> get my email about the gps?
[09:40] <edwardmoore> yep
[09:40] <edwardmoore> have added it to the order
[09:41] <edwardmoore> just gonna wait to see if steve wants anything and will order at midday, which is still before they'll have woken up
[09:41] <jcoxon> good point
[09:41] <jcoxon> trying to track down weights of the gumstix
[09:42] <edwardmoore> i might need a gumstix....
[09:42] <edwardmoore> basically i need something to crank throuhg some 32bit calculations
[09:42] <edwardmoore> maybe an ARM would do instead, i'm not sure
[09:42] <jcoxon> what you building?
[09:43] <edwardmoore> exactly what we're building but i figure if i have a copy myself i can play more and can try out new ideas at 2am when i suddenly decide i need to try out a new idea
[09:43] <edwardmoore> for example
[09:44] <jcoxon> ooo sorry
[09:44] <jcoxon> right that makesense
[09:44] <jcoxon> well i could put my gumstix online for you :-D
[09:44] <edwardmoore> lol
[09:44] <edwardmoore> online?
[09:44] <jcoxon> as in you could ssh into it
[09:44] <jcoxon> and play
[09:45] <edwardmoore> ha, genius
[09:45] <jcoxon> there is also a gumstix cluster online
[09:45] <jcoxon> for people to use
[09:45] <jcoxon> can native compile
[09:45] <edwardmoore> yeah i was wondering if a gumstix could run a compiler for itself?
[09:45] <jcoxon> yeah
[09:45] <jcoxon> i have a cf card
[09:45] <jcoxon> with it on
[09:45] <edwardmoore> is GCC too big?
[09:45] <edwardmoore> ok cool
[09:46] <jcoxon> well with all the additional libraries
[09:46] <jcoxon> so shall i stick it online?
[09:46] <jcoxon> or
[09:46] <jcoxon> shall i find the link for hte cluster
[09:46] <edwardmoore> s'ok, the stuff i wanted to play with would involve actually talking to pics
[09:46] <jcoxon> just getting a gumstix will cost
[09:46] <edwardmoore> and i'm not interfacing them to the web!!
[09:46] <jcoxon> hehe
[09:48] <edwardmoore> i'll have a look at some ARMs
[09:48] <jcoxon> first thing i'm going to do is set up a way for hte motherboard to detect what daughterboard it is attached to
[09:52] <edwardmoore> steve's just sent me a lovely line drawing of an old nasa lifting body
[09:52] <edwardmoore> along with: "do you reckon the router could make it?"
[09:54] <jcoxon> router?
[09:54] <jcoxon> oh
[09:54] <jcoxon> cnc
[09:54] <jcoxon> can it?
[09:55] <edwardmoore> yep. a blue foam version anyway
[09:55] <edwardmoore> do you know how accurate the digital compasses are?
[09:58] <jcoxon> ummm not sure
[09:58] <jcoxon> sorry
[09:58] <edwardmoore> np
[09:58] <jcoxon> will bbl
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[14:19] <Laurenceb> Hi all
[14:19] <Laurenceb> I am back !!!
[14:20] <Laurenceb> Exams over Woot !!!
[14:25] <Laurenceb> What's happening parafoil wise?
[14:56] <jcoxon> hey Laurenceb
[14:56] <jcoxon> sorry for not emailing back recently
[14:57] <jcoxon> been very busy
[14:57] <jcoxon> ooo rubbish have to dash again
[15:01] <Laurenceb> Okay
[15:01] <Laurenceb> did you get my email?
[15:02] <Laurenceb> I'm thinking of making a stand alone unit with compass and rate gyro
[15:05] <Laurenceb> using http://www.sparkfun.com/commerce/product_info.php?products_id=8370
[15:13] <Laurenceb> and then a sparfun compass or one from devantech
[15:13] <edwardmoore> an accurate compass would be useful in general
[15:13] <Laurenceb> I could make it mega8 powered with an lcd
[15:14] <Laurenceb> yes the sparkfun one is +_2 degred
[15:14] <Laurenceb> -degrees
[15:14] <Laurenceb> devantech +-4
[15:14] <edwardmoore> that's impressive. might be able to use it
[15:14] <Laurenceb> and only 8hz
[15:14] <Laurenceb> I've emailed the guy to see if they can supply me one with higher update
[15:15] <Laurenceb> I plan to run it at 60HZ
[15:15] <edwardmoore> is that really necessary?
[15:15] <Laurenceb> - 60hz kalman filter with rate gyro and compass
[15:15] <edwardmoore> surely you can fill in the gaps from an integrated gyro info?
[15:15] <Laurenceb> well it'll be more mint
[15:15] <edwardmoore> lol
[15:15] <Laurenceb> it makes it better :)
[15:16] <Laurenceb> the problem with compasses is they have to be horizontal
[15:16] <Laurenceb> so there will be tons of error from that
[15:16] <edwardmoore> not if you add a third magnetometer....
[15:16] <Laurenceb> that wont help
[15:17] <edwardmoore> no you can work out heading with 3
[15:17] <edwardmoore> it's just a lot of geomtrey in the micro
[15:17] <edwardmoore> sorry gtg
[15:17] <Laurenceb> you cant work out 3 euler angles from a single vector
[15:17] <Laurenceb> but you can get a reasonable heading from compass + rate gyro
[15:18] <Laurenceb> if you had kalman filtered 3 axis mag, accel, and rate gyros
[15:18] <Laurenceb> you could get euler angles
[15:18] <Laurenceb> an AVR should cope with lots of 32bit floats
[15:20] <Laurenceb> cya then
[15:26] <Laurenceb> Aha CMPS03 only goes up to 33ms
[15:34] <Laurenceb> I'll use this instead http://www.sparkfun.com/commerce/product_info.php?products_id=243
[15:36] <Laurenceb> anyone about on here still?
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[16:33] <edwardmoore> hi laurenceb
[16:33] <edwardmoore> am back for a bit
[16:38] <Laurenceb> sorry, talking on electronics brb
[17:03] <Laurenceb> still there?
[17:19] <edwardmoore> hi laurenceb
[17:19] <edwardmoore> yes
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[17:21] <Laurenceb> hi there
[17:21] <Laurenceb> sorry was on # electronics for agaes
[17:21] <edwardmoore> np
[17:21] <Laurenceb> -ages
[17:21] <edwardmoore> i've switched to avrs btw
[17:21] <Laurenceb> talking about guidance
[17:21] <Laurenceb> yey
[17:21] <Laurenceb> what compiler?
[17:21] <edwardmoore> they're have a more sensible internal structure
[17:22] <Laurenceb> yep thats true
[17:22] <edwardmoore> well at the momment avr-gcc
[17:22] <Laurenceb> hmmm
[17:22] <Laurenceb> ive never mastered it
[17:22] <edwardmoore> it's just c
[17:22] <Laurenceb> I hadnt done anything with micros before I got involved with balloons
[17:22] <edwardmoore> although if i have problems i may come knocking
[17:22] <Laurenceb> so I went for something fairly easy to use
[17:23] <edwardmoore> for some help from messers baz and com
[17:23] <Laurenceb> should get something better now I have much more experience
[17:23] <edwardmoore> well gcc-avr is nice from my very brief flirtation with it
[17:23] <Laurenceb> yes
[17:23] <edwardmoore> parsing the gps string isn't as painful as i thought it would be
[17:23] <Laurenceb> I was considering codevision avr
[17:24] <Laurenceb> yes that put me off a bit
[17:24] <Laurenceb> but codevision is expensive
[17:24] <Laurenceb> its what atmel recommend
[17:24] <Laurenceb> anyway how are you programming them?
[17:24] <Laurenceb> STK500?
[17:25] <Laurenceb> and ponyprog?
[17:25] <edwardmoore> ponyprog
[17:25] <Laurenceb> yey neigh
[17:25] <Laurenceb> that program is so daft
[17:25] <edwardmoore> seems fine so far but i've not played extensively
[17:26] <Laurenceb> did you get the sound effects?
[17:26] <edwardmoore> it was really the sparkfun guide that persuaded me to give it a go
[17:26] <edwardmoore> no sound effects yet....
[17:26] <Laurenceb> I see I'll give it a read
[17:26] <edwardmoore> how did you parse in baxcom?
[17:26] <Laurenceb> bascom?
[17:27] <Laurenceb> it has inbuilt string commands
[17:27] <edwardmoore> whatever it's called
[17:27] <Laurenceb> so its just like input(s,#2)
[17:27] <Laurenceb> where #2 is a serial channel or a file in the filesystem
[17:28] <Laurenceb> and s is a string
[17:28] <Laurenceb> then you can muck about with string commands
[17:28] <edwardmoore> so i mean it has all the ascii to integer/float/whatever commands?
[17:28] <Laurenceb> I now have fat 32 filesystem
[17:28] <Laurenceb> yep if s is a float it takes care of it for you
[17:29] <edwardmoore> cool
[17:29] <Laurenceb> ie it converts "0.3453344" in ascii to a proper float
[17:29] <edwardmoore> nice
[17:29] <Laurenceb> failing that there is always float()
[17:29] <Laurenceb> that does it for you
[17:30] <edwardmoore> you should stick your source code up one of these days :)
[17:30] <Laurenceb> its nice as you can easily communicate between chips in ascii
[17:30] <Laurenceb> sending variables ect
[17:30] <Laurenceb> there a bunch up on the wiki
[17:30] <edwardmoore> i'll have a look
[17:30] <edwardmoore> just put in a big sparkfun order
[17:31] <Laurenceb> I now have lots of subroutines for balloon realted tasks
[17:31] <Laurenceb> doh
[17:31] <edwardmoore> gonna put one of the gps's into use for an automated antenna pointer
[17:31] <Laurenceb> i wanted to order a buch of stuff
[17:31] <Laurenceb> lol cool
[17:31] <edwardmoore> i'm sure i'll be putting another order in soon, not to worry
[17:32] <Laurenceb> problem is I dont want MCs electronics getting hold of my code
[17:32] <Laurenceb> the devious bunch
[17:32] <Laurenceb> thats how they make bascom so good
[17:32] <Laurenceb> they scour the web for code people have written in bascom and incoporate it into the compiler
[17:33] <Laurenceb> without asking permission first
[17:33] <edwardmoore> ok fair enough
[17:33] <Laurenceb> I think they got permission for the FAT32 support
[17:34] <Laurenceb> anyways my exams are over :)
[17:34] <edwardmoore> writing fat32 support must have been a pig
[17:34] <Laurenceb> have you had exams?
[17:34] <edwardmoore> yep
[17:34] <edwardmoore> and they are over too
[17:34] <Laurenceb> how did it go?
[17:34] <edwardmoore> and now i can play electronics and be happuy
[17:34] <Laurenceb> yey
[17:35] <edwardmoore> not too bad. not great either
[17:35] <edwardmoore> such is life :)
[17:35] <Laurenceb> me too
[17:35] <edwardmoore> but i'm glad i can now devote some time to doing stuff
[17:35] <Laurenceb> I did really well on the exam I thought I'd fail
[17:35] <Laurenceb> -nuclear physics
[17:35] <Laurenceb> and then astrophysics went dad when I thought I was good at it
[17:35] <Laurenceb> -bad
[17:36] <edwardmoore> similar for me
[17:36] <Laurenceb> have you just finished 3rd year?
[17:37] <Laurenceb> or 2nd?
[17:37] <edwardmoore> 1st
[17:37] <Laurenceb> duh
[17:37] <Laurenceb> I see
[17:37] <Laurenceb> yep I'm into 4th year
[17:38] <edwardmoore> grand old daddy now
[17:38] <Laurenceb> guess your first year exams arnt vital
[17:38] <Laurenceb> unlike mine :)
[17:38] <Laurenceb> oh well 4th year is a dodle
[17:39] <Laurenceb> not sure if I should do quantum computing or physical bioscience
[17:39] <Laurenceb> both very cool 4th year options
[17:39] <edwardmoore> physical bioscience would probably get you a job
[17:39] <edwardmoore> quantum computing would probably get you confused
[17:39] <Laurenceb> in a hospital :(
[17:39] <Laurenceb> lol yes
[17:40] <Laurenceb> I'm certainly going to do atmospheric science, we have 2 options
[17:41] <edwardmoore> that'll be cool. doing research should be a doddle!
[17:41] <Laurenceb> I can launch balloons as my project work :)
[17:41] <edwardmoore> ooh shit sorry laurence, gotta be in town at 6
[17:41] <edwardmoore> need to get myself on a bike
[17:41] <Laurenceb> okay
[17:41] <edwardmoore> cya later
[17:41] <Laurenceb> just one point
[17:41] <edwardmoore> ok high speed now
[17:41] <Laurenceb> I'm thinking of getting a gyro + compass of sparkfun
[17:42] <Laurenceb> for a self contained heading lock unit
[17:42] <edwardmoore> that'll be useful- i got their 5axis imu in amongst my order from them
[17:42] <Laurenceb> if your ordering could you get me some stuff?
[17:42] <edwardmoore> jsut the sensors rather that the controller too
[17:42] <edwardmoore> next order i put in i'll be sure to give you a shout
[17:42] <Laurenceb> hmm not sure about that
[17:42] <Laurenceb> yep well work it out then
[17:43] <Laurenceb> cya then
[17:43] <edwardmoore> cool- cya!
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[18:48] <Laurenceb> hi there
[18:48] <icez> hello
[18:49] <Laurenceb> I've finished exams :)
[18:49] <icez> yay
[18:50] <Laurenceb> working on parafoil i think
[18:50] <Laurenceb> any ideas ?
[18:50] <icez> uhm
[18:51] <Laurenceb> guidance wise
[18:51] <icez> well
[18:52] <icez> for turning I would use a motor with some sort of stick that goes across in the middle...tie each side of the foil to it, so then you can turn the motor one way to turn the parafoil one way and turn
[18:53] <icez> or the other way...
[18:53] <icez> or not at all :)
[18:53] <Laurenceb> yep
[18:53] <Laurenceb> http://uk.farnell.com/jsp/search/browse.jsp?N=411+1000010&Ntk=gensearch_001&Ntt=accelerometer&Ntx=
[18:53] <Laurenceb> farnell sell acelerometers :)
[18:57] <Laurenceb> I'm thinking one of these at the top of the parafoil ...
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[21:48] <rocketboy> hiya ed
[21:53] <Laurenceb> Hi rocketboy
[21:53] <Laurenceb> bbl food :)
[21:58] <rocketboy> cu later
[21:58] <rocketboy> (lb)
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[22:24] <Laurenceb> hi there
[22:24] <Laurenceb> I'm back
[22:24] <Laurenceb> I've finished my exams:)
[22:24] <rocketboy> hiya lb
[22:25] <Laurenceb> just 4th year to go
[22:25] <rocketboy> got any balloony plans
[22:25] <rocketboy> ?
[22:25] <Laurenceb> I owe you some money for that radio
[22:25] <Laurenceb> so I'll send you a cheque for that
[22:25] <Laurenceb> and a balloon
[22:25] <Laurenceb> sorry about the delay
[22:25] <Laurenceb> anyway
[22:25] <rocketboy> oh - yeah - and I have been trying to get it from the US
[22:26] <rocketboy> but they are out of stock of the 1500s
[22:26] <Laurenceb> yes I still want to do ultrahab
[22:26] <Laurenceb> okay
[22:26] <rocketboy> I'll ring them again - they were going to mail me (but havn't)
[22:26] <Laurenceb> I've been talking with some guys at atmospheric physics at oxford
[22:27] <rocketboy> uh ha?
[22:27] <Laurenceb> and thinking of some sensors
[22:27] <Laurenceb> humidity, pressure and temperature
[22:27] <rocketboy> sure - what about an old radiosode
[22:28] <rocketboy> radiosonde
[22:28] <Laurenceb> not sure if we could use an old radiosonde or a sensor off sparkfun
[22:28] <Laurenceb> they've got a few radiosondes
[22:28] <rocketboy> I have some old radiosonds if you want to try one
[22:28] <Laurenceb> not sure if it worth it
[22:29] <Laurenceb> as the data and stuff is well known
[22:29] <rocketboy> the problem is calibration
[22:29] <Laurenceb> yes we can do that at the department
[22:29] <Laurenceb> they have lots of kit
[22:29] <rocketboy> the format is realtivly easy
[22:29] <Laurenceb> format?? its analogue
[22:30] <Laurenceb> capacitance based sensors
[22:30] <rocketboy> its a multi-step tine output (one tone for each sensor) - where the level is output as a frequency
[22:30] <Laurenceb> the sensors on sparkfun are digital
[22:30] <rocketboy> yep -easier
[22:32] <Laurenceb> okay I was going to remove the sensors and build my own interface board
[22:33] <Laurenceb> not sure what to use... 555 timers
[22:33] <Laurenceb> or a schmitt tigger and pulsed io port based thing
[22:33] <rocketboy> (555 - ug) you could do that - or the sensor block contains the oscilator
[22:34] <Laurenceb> well idea was to have the 555 output going to an io port
[22:34] <Laurenceb> and then frequency counting it in software
[22:36] <rocketboy> I had a cct I used on the PIC to measure capacitance - a resistor pulled the C up - the PIC pin is in input mode - wait until the input goes high (C charging through R) - then swich PIC pin to output and drive low - wait for a bit (for C to discharge) then turn to input gain and wait for it to go high - repeat - measure length or time to go high
[22:37] <Laurenceb> http://www.sparkfun.com/commerce/product_info.php?products_id=8257
[22:37] <Laurenceb> yep that was my idea
[22:38] <Laurenceb> anyways my other idea for over the summer was to work on the parafoil
[22:38] <rocketboy> solves the problem but ££
[22:38] <Laurenceb> I was thinking of making a standalone unit with gyro and compass
[22:39] <Laurenceb> so the gumstix sends the heading for it to lock onto
[22:39] <Laurenceb> based on the gps position
[22:39] <rocketboy> Just got my 3rd rate gyro off ebay cheap - now have 3 axis rate gyro
[22:39] <Laurenceb> http://www.sparkfun.com/commerce/product_info.php?products_id=8371
[22:39] <Laurenceb> lol any good?
[22:40] <rocketboy> yep
[22:40] <Laurenceb> a piezo one?
[22:40] <Laurenceb> off a servo heading lock unit
[22:40] <Laurenceb> I was thinking of getting that thing off sparkfun
[22:41] <rocketboy> they are the ENC03 type
[22:41] <Laurenceb> http://www.sparkfun.com/commerce/product_info.php?products_id=243
[22:41] <Laurenceb> along with that compass
[22:42] <Laurenceb> then a mega8
[22:42] <Laurenceb> using kalman filtering and pid loop
[22:43] <Laurenceb> and maybe an lcd http://www.sparkfun.com/commerce/product_info.php?products_id=709
[22:43] <Laurenceb> to let you know what the kalman filter thinks and stuff
[22:45] <rocketboy> ever used a custom PCB service?
[22:45] <Laurenceb> nope its expensive
[22:45] <rocketboy> I need to have a small double sided PCB made
[22:45] <Laurenceb> but so will this thing
[22:46] <Laurenceb> the compass will go off when its non horizontal but the kalman and gyro will keep it in check
[22:46] <Laurenceb> problem is if its not centered about horizontal the compass will be off
[22:47] <Laurenceb> so well have to rig it correctly so that the compass module is horizontal
[22:48] <Laurenceb> when its it stable flight
[22:50] <Laurenceb> the heading lock unit could be used on other stuff e.g. boats
[22:50] <Laurenceb> I was also thinking we could all meet up in cambridge
[22:50] <Laurenceb> over the summer
[22:50] <Laurenceb> and have a "habfest"
[22:51] <Laurenceb> over a week or two
[22:51] <rocketboy> sounds good
[22:52] <Laurenceb> we could use the facilities at CUED
[22:52] <Laurenceb> I hope :)
[22:52] <Laurenceb> I got accomodation at churchill for a couple of days last summer
[22:53] <Laurenceb> Anyway just got to sort some stuff back in 10 minutes
[22:54] <rocketboy> ok
[23:04] <Laurenceb> I'm back
[23:05] <Laurenceb> another thing I was thinking was to launch into a thunderstorm :)
[23:05] <Laurenceb> I have to do an mphys project next year
[23:08] <Laurenceb> it'd be something interesting to do
[23:08] <Laurenceb> thunderstorms are little researched
[23:09] <Laurenceb> http://en.wikipedia.org/wiki/Sprite_%28lightning%29
[23:17] <rocketboy> try launching a forcket into a tunderstorm - the lightning tarcks back down the smoke trail - cool
[23:17] <rocketboy> frocket = rocket
[23:17] <rocketboy> tarcks = tracks
[23:18] <rocketboy> anyway gotta go cu
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[00:00] --- Tue Jun 19 2007