highaltitude.log.20070106

[00:16] mythtv (n=mythtv@host86-128-47-200.range86-128.btcentralplus.com) joined #highaltitude.
[00:16] <mythtv> hi
[00:19] Nick change: mythtv -> Max0
[00:31] <icez> hi Max0
[00:32] <Max0> hi ive just come across the channel
[00:32] <Max0> been researching lauching a ballon
[00:32] <Max0> :)
[00:40] <icez> you've come to the right place
[00:41] <Max0> so many questions yet still to answer
[00:41] <Max0> :)
[00:41] <Max0> im shattard so going to bed but will be back
[00:41] <Max0> take it easy
[00:41] <icez> ok:)
[00:41] <icez> take care
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[10:18] <jcoxon> oh poo :-)
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[13:06] <Max0> cool
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[14:29] <Max0> hi Ebola
[14:29] <Ebola> 'lo
[14:29] <Max0> where you from?
[14:31] <Ebola> London
[14:32] <Max0> im from york
[14:32] <Max0> found the channel yesterday
[14:32] <Ebola> cool
[14:33] <Ebola> You really want to talk to someone who doesn't just ide here :P But no one fitting that description is here right now :/
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[14:35] <Ebola> like him
[14:36] <Max0> ive been researching lauching a ballon
[14:37] <Max0> so thats how i came across the channel
[14:37] <Max0> :)
[14:37] <Max0> am i right in thinking Pegasus IV is lauching soon?
[14:38] <jcoxon> heh
[14:38] <Max0> :D
[14:38] <jcoxon> e
[14:38] <jcoxon> just got the helium
[14:38] <Max0> whats the bot coded in?
[14:38] <jcoxon> its an eggdrop bot
[14:38] <jcoxon> so tcl
[14:38] <jcoxon> but also it calls a perl script to read email and therefore plot positions
[14:38] <Max0> ah cool coded one in perl a while ago
[14:39] <Max0> wicked
[14:40] <Max0> so you ready for tomorrow?
[14:41] <Max0> will the bot have real time postions?
[14:41] <jcoxon> the payload is finished in regards to hardware
[14:41] <jcoxon> just need to do the code for the cutdown
[14:41] <Max0> cutdown?
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[14:41] <Max0> good luck :)
[14:42] <jcoxon> basically the bot will get sent a text message every 10minutes from hte payload (i get one every 2)
[14:42] <Max0> so just a shell scipt?
[14:43] <jcoxon> on the payload side yup
[14:43] <Max0> cool
[14:43] <jcoxon> it gets sent to a sms to email gateway
[14:43] <jcoxon> which sends an email to zeusbot
[14:43] <Max0> good idea
[14:43] <jcoxon> the perl script reads the email and prints the coords
[14:43] <Max0> so do u have it sms to a phone as well
[14:43] <jcoxon> i can also send messages - e.g ones we get from the radio
[14:43] <jcoxon> yup
[14:43] <jcoxon> every 2 minutes to me
[14:43] <Max0> :D
[14:44] <Max0> v clever
[14:44] <jcoxon> hopefully it should work
[14:44] <Max0> how high can you get sms from
[14:44] <jcoxon> not high at all
[14:44] <jcoxon> 3000ft
[14:44] <Max0> i was thinking u could use a data call
[14:44] <Max0> then you have postion in real time
[14:44] <Max0> or every few secs
[14:45] <Max0> ove gprs
[14:45] <Max0> over*
[14:45] <jcoxon> the problem is that it sees to many masts and gets confused
[14:45] <jcoxon> could do that with the radio i guess
[14:46] <jcoxon> when we have a cool ground station
[14:46] <jcoxon> with lots of screens and technicans
[14:46] <Max0> :)
[14:46] Action: jcoxon continues to dream of a nasa style launch
[14:46] <Max0> if id know about it sooner id have been intrested in helping out
[14:46] <Max0> or coming down for the lauch
[14:47] <jcoxon> they'll be more!
[14:47] <jcoxon> hopefully
[14:47] <Max0> :D
[14:47] <jcoxon> we are having issues about balloons
[14:47] <jcoxon> big issues
[14:47] <Max0> in what way?
[14:47] <jcoxon> the one we were going to use hasn't arrived
[14:47] <Max0> :(
[14:47] <jcoxon> the only balloons that are available are 2 old ones i have
[14:47] <jcoxon> gonna have to use 2 balloons - should be interesting
[14:48] <Max0> yuh
[14:48] <jcoxon> won't get a good altitude but actually the weather isn't great anyway
[14:48] <Max0> wind could be a issue with two
[14:48] <Max0> do you use some method to stop the payload spining?
[14:49] <jcoxon> nope nothing has been designed yet
[14:49] <jcoxon> its quite difficult to stop
[14:49] <Max0> i was watching a movie on google videos
[14:49] <Max0> where they filmed a elipse
[14:49] <Max0> from a ballo
[14:50] <Max0> balloon*
[14:50] <jcoxon> oh cool (an eclipse i assume :-D )
[14:50] <Max0> hehe yuh :D
[14:50] <jcoxon> scientists do it alot
[14:50] <jcoxon> for the telescopes
[14:50] <jcoxon> use reaction wheels i think
[14:51] <Max0> where you laughing from?
[14:51] <Max0> launching*
[14:51] <jcoxon> cambridge
[14:52] <Max0> via the sms to the bot, could you get that to plot the graph on google maps
[14:52] <Max0> :D
[14:52] <jcoxon> yup
[14:52] <Max0> sweet
[14:52] <jcoxon> if i have time
[14:52] <jcoxon> at the moment if you look here:
[14:53] <jcoxon> http://www.srcf.ucam.org/~jac208/pegasus/peg4log
[14:53] <jcoxon> it'll but the google map url of the position
[14:53] <jcoxon> though its full of test strings right now it'll do it correctly
[14:53] <jcoxon> right i'll be back later - have to go and buy some batteries before maplin closes
[14:53] <jcoxon> cya later
[14:54] <Max0> cya
[14:56] <Max0> edit that line of the bot to be some thing like http://maps.google.co.uk/maps?f=q&hl=en&q=%20%20%$var1,-$var2
[14:57] <Max0> ;)
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[15:42] <jcoxon> rigt i'm back
[15:43] <jcoxon> got my batteries for less then usual - they had made a mistake on the pricing :-D
[15:43] <jcoxon> also bumped into Henry from the Nova team -they are going to give us their 3 good 350g balloons
[15:45] <jcoxon> hmmm do people want raw long lat and altitude
[15:46] <jcoxon> or the google map url?
[15:48] <Max0> good news about the ballon
[15:49] <jcoxon> yup
[15:49] <jcoxon> they are better quality - haven't been exposed to sunlight
[15:50] <jcoxon> though we'll still have to fly multiple balloons
[15:50] <Max0> im thinking of gettin a gumstick
[15:50] <jcoxon> sort of wish we had a up facing camera to take pictures
[15:50] <jcoxon> Max0 cool
[15:50] <Max0> i was goin to use a itx
[15:50] <jcoxon> for high altitude ballooning?
[15:50] <Max0> yeah
[15:50] <jcoxon> and itx is too big and power hungry
[15:50] <Max0> yuh i thought it would be
[15:51] <jcoxon> do you have any experience with PICS?
[15:51] <Max0> no
[15:51] <jcoxon> or are you more of a computer guy?
[15:51] <Max0> yeah :D
[15:51] <jcoxon> oh okay
[15:51] <jcoxon> there are 2 types of payloads
[15:51] <Max0> i did gcse electornics tho
[15:51] <jcoxon> payloads by people who can do electronics
[15:51] <jcoxon> and those who do computers
[15:51] <jcoxon> i do computers
[15:52] <Max0> coolio
[15:52] <Max0> computers more
[15:52] <jcoxon> i recommend a gumstix then
[15:52] <Max0> yuh id never heard of them before i found your site
[15:52] <jcoxon> oh good - sort of feel i should advertise for them
[15:53] <jcoxon> they gave me a new gumstix when Peg II ditched in the sea
[15:53] <Max0> there is one on ebay at the mo..
[15:53] <Max0> tem number: 180071736299
[15:54] <jcoxon> thats worth it
[15:54] <jcoxon> even it the buy it now price
[15:54] <jcoxon> the customs from the US make it rather expensive
[15:55] <Max0> what gps would you recomend as i found this
[15:56] <jcoxon> well what board would you use?
[15:56] <Max0> http://cgi.ebay.co.uk/Navman-Jupiter11-12-channel-GPS-module-board-receiver_W0QQitemZ180070408272QQihZ008QQcategoryZ4668QQssPageNameZWDVWQQrdZ1QQcmdZViewItem?hash=item180070408272
[15:56] <jcoxon> i guess the waysmall
[15:56] <jcoxon> hehe
[15:56] <jcoxon> i'm flying one of these tomorrow
[15:56] <jcoxon> or very similar
[15:56] <Max0> hehe cool
[15:57] <jcoxon> actually thats a better one
[15:57] <jcoxon> however
[15:57] <jcoxon> it outputs at TTL level
[15:57] <jcoxon> if you use a gumstix with a waysmall you have rs232 serial ports instead
[15:57] <jcoxon> so you'd need to shift the levels
[15:57] <Max0> ic
[15:57] <jcoxon> i recommend getting a normal rs232 gps
[15:57] <jcoxon> see Pegasus I
[16:00] <Max0> how long do 3 AA batterys power the gumstick?
[16:02] <jcoxon> depends what type
[16:02] <jcoxon> i've got about 5 hours out of it
[16:03] <jcoxon> maybe a bit more
[16:03] <jcoxon> depends how much work its doing
[16:03] <Max0> yuh
[16:03] <Max0> 5 hours should be fine
[16:03] <jcoxon> certainly make a flight
[16:04] <Max0> and give a few hours to recover
[16:04] <jcoxon> yup
[16:04] <jcoxon> i'm going back to my gumstix after this flight
[16:04] <jcoxon> this was a test to see if it was possible
[16:04] <Max0> what are you using on this one?
[16:05] <jcoxon> a wireless router :-D
[16:05] <jcoxon> running OpenWrt Linux
[16:05] <Max0> lol
[16:05] <Max0> mint
[16:06] <jcoxon> what i like is now everything on the payload has been hacked to do something it wasn't really meant to do
[16:06] <jcoxon> a gumstix didn't count as it was a sort of hobby system
[16:06] <jcoxon> it has no defined use
[16:07] <Max0> yuh
[16:07] <Max0> im into things like that
[16:08] <jcoxon> go for the gumstix
[16:08] <Max0> i was thinkin of using a webcam and itx pc
[16:08] <Max0> but gum stix and normal digi cam i think is the better way
[16:08] <jcoxon> if you want pictures yeah
[16:08] <jcoxon> though they are only interfaced to control the shutter
[16:09] <jcoxon> no way of downloading hte pics onto the gumstix
[16:09] <Max0> doesnt matter really tho does it :D
[16:09] <jcoxon> i guess you could use a serial camera
[16:09] <jcoxon> nah it doesn't
[16:09] <Max0> or voip
[16:09] <Max0> ip even
[16:16] <Max0> i might try a router
[16:16] <Max0> as it looks cheaper
[16:17] <jcoxon> :-)
[16:17] <jcoxon> could get one with usb
[16:17] <jcoxon> that would be interesting
[16:17] <Max0> i think i have one
[16:18] <Max0> ah its a modem
[16:18] <jcoxon> i like the gumstix as they are more expandable
[16:18] <jcoxon> like having i2c
[16:18] <Max0> i woudnt need a wifi one
[16:18] <jcoxon> or proper gpios
[16:18] <jcoxon> you wouldn't however mainly wireless ones run openwrt
[16:18] <Max0> yuh for a small test bed it could be cheap
[16:19] <Max0> did yours?
[16:19] <Max0> can u flash them?
[16:19] <jcoxon> mine has wifi
[16:19] <jcoxon> yup
[16:19] <jcoxon> i checked it out before i bought it
[16:19] <jcoxon> openwrt have a good table of hardware
[16:20] <Max0> intresting
[16:21] <jcoxon> i'll complete my documentation after the flight
[16:23] <icez> hey jcoxon, what does zeusbot run off?
[16:23] <jcoxon> oh its off the student server here at cambridge
[16:23] <icez> but which program?
[16:23] <icez> :P
[16:23] <jcoxon> of its an eggdrop bot
[16:23] <jcoxon> oh*
[16:23] <icez> doh.
[16:24] <Max0> jcoxon: do you have any urls on which devices run with openwrt
[16:25] <jcoxon> http://wiki.openwrt.org/TableOfHardware?action=show&redirect=toh
[16:26] <Max0> thank you
[17:03] <Max0> jcoxon: you about
[17:03] <jcoxon> yup
[17:03] <Max0> you know that gps card i showed you before
[17:03] <Max0> would that be ok with a router
[17:03] <jcoxon> yup
[17:04] <jcoxon> the router serial ports will most likely be at TTL level
[17:04] <jcoxon> same as the gps
[17:04] <Max0> sweet ill buy it now then
[17:04] <Max0> :D
[17:04] <Max0> whats the uptime of your system on what batterys
[17:08] <jcoxon> i ran it with wireless off on Nimh 2000mAh for 3.5 hours
[17:08] <jcoxon> lithiums should give me a bit more
[17:08] <jcoxon> i reckon i'll scrap 5 hours
[17:08] <Max0> plenty then
[17:08] <jcoxon> i hope so!
[17:09] <jcoxon> if it fails we've got radio
[17:09] <jcoxon> and also i can track the phone itself within a mile or so
[17:09] <Max0> via the web?
[17:10] <jcoxon> yup
[17:10] <jcoxon> you know those sites to track phones e.g parents and children
[17:10] <Max0> yuh
[17:10] <Max0> check this one www.phonetrace.org
[17:10] <Max0> ;)
[17:13] <jcoxon> haha
[17:15] <Max0> lol
[17:20] <Max0> just bought that gps card
[17:20] <Max0> 14.25 posted
[17:28] <jcoxon> :-)
[17:28] <jcoxon> Max0 add yourself to the ukhas wiki members page if you want
[17:28] <jcoxon> its open to anyone
[17:29] <Max0> cool cheers i will do
[17:29] <Max0> what time u lauching tomorrow?
[17:32] <jcoxon> about 10
[17:33] <Max0> kk ill be on here :D
[17:33] <jcoxon> cool
[17:33] <jcoxon> just call !position occasionally to get the position
[17:33] <jcoxon> however there will probably be a comms black out for most of the flight due to the phone being out of reception
[17:33] <Max0> ok i will do
[17:34] <jcoxon> i'll text occasionally the coords from the radio
[17:34] <Max0> could u code the bot to auto /msg the chan
[17:34] <Max0> when the past gps changes
[17:34] <Max0> if that makes sence
[17:34] <jcoxon> i could probably
[17:34] <jcoxon> i'll see how i'm going later
[17:34] <jcoxon> still working on the code for the cutdown
[17:35] <jcoxon> trying to decide the flight zone
[17:35] <Max0> if ya get stuck pastebin the code
[17:36] <jcoxon> thanks
[17:47] <jcoxon> bbl
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[18:28] <rocketboy> jcoxon you about??
[19:09] <jcoxon> yup
[19:24] <rocketboy> op - sorry I was having my tea
[19:25] <jcoxon> np
[19:25] <rocketboy> I don't think mc's payload will be flying - it seems complety dead now
[19:26] <jcoxon> oh
[19:26] <jcoxon> not sure what to do
[19:26] <rocketboy> the bad news is that it is consuming a load of current 200mA+ - so there is somthing decidedly wrong
[19:27] <jcoxon> hmmm - i reckon its better to leave it out then
[19:27] <jcoxon> let it fly another day
[19:27] <rocketboy> me thinks too
[19:28] <rocketboy> OK - i'm still integrating
[19:28] <rocketboy> but I expect to be ready
[19:28] <jcoxon> i've just finished the cutdown
[19:28] <jcoxon> code
[19:29] <rocketboy> That given I make the total payload 1.5Kg = 700 Peg 4 + 500 Xab 1 + 200 laurance stuff + 100 henry cutdown
[19:30] <rocketboy> I should have a working cutdown too
[19:30] <jcoxon> Laurence is here now
[19:30] <jcoxon> excellent
[19:30] <jcoxon> have you spoken to henry then?
[19:30] <rocketboy> no (guess)
[19:30] <jcoxon> oh okay - its just that you added 100 for him
[19:30] <jcoxon> sorry
[19:31] <rocketboy> yes just a guess about the weight of whatever he puts together - I cant see it being more than 100g
[19:32] <rocketboy> Given the radar refelctor will add some drag I'm thinking your existing chute should be OK?
[19:32] <jcoxon> no i reckon that'll be fine
[19:32] <jcoxon> yeah
[19:32] <rocketboy> is it a 36"
[19:33] <jcoxon> yup
[19:33] <Max0> how much can a 36" support?
[19:34] <Max0> few kg?
[19:35] <rocketboy> that depends on how fat it comes down - and what its drag is - a 36" would normally be ok for about 1Kg
[19:37] <rocketboy> but we are using a big RADAR reflector that will add some drag too
[19:37] <rocketboy> fat = fast
[19:37] <jcoxon> i'm happy with 36"
[19:38] <jcoxon> Laurence is fine as well
[19:42] <Max0> what do the radar reflectors do let it show up on radar?
[19:42] <jcoxon> yup
[19:44] <Max0> ic
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[21:05] <jcoxon> oh crap
[21:07] <Max0> ?
[21:13] <jcoxon> not long
[21:14] <jcoxon> rocketboy - henry can only find 1 350g balloon
[21:14] <jcoxon> he is suggesting 350 + 2x200
[21:17] <rocketboy> humm - well the way things are going here I may not be flying anyway
[21:20] <jcoxon> really?
[21:20] <jcoxon> whats the situation?
[21:22] <rocketboy> the radio transmitter system seems to have stopped working - since I re-assembled iit to run at a faster baud rate
[21:22] <jcoxon> hmmmm
[21:26] <jcoxon> i'm having a few issues myself
[21:26] <rocketboy> it seems to be somthing to do with the USART - its not sending either - although the rest of it is working (LEDs flash - transmitter transmits) - but no data is getting through
[21:26] <jcoxon> but i'm confident that i can fix them
[21:28] <Max0> ive just coded a cutdown system
[21:57] <Max0> http://pastebin.com/853029
[22:03] <rocketboy> jcoxon - do I need to bring any spanners?
[22:06] <jcoxon> ummm not for the helium canister
[22:08] <jcoxon> but if you can
[22:08] <icez> :)
[22:09] <jcoxon> i haven't changed anything yet
[22:17] <jcoxon> Max0 thats pretty much identical to the one i've written :-D
[22:17] <jcoxon> though i've realised that i need to make it ignore it when there isn't a gps lock and it gives zeros
[22:20] <jcoxon> hehe - you mispelt cutdown
[22:34] Action: jcoxon is slightly juvenile
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[22:45] <Max0> hehe
[22:46] <Max0> hows it all coming together?
[22:46] <Max0> lmao at cuntdown system
[22:46] <Max0> lol
[22:48] <icez> jeez, urethane is sticky :[
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[22:51] <jcoxon> hey Henry_
[22:51] <Henry_> Hi
[22:51] <jcoxon> Max0 its coming together better now
[22:51] <Henry_> They blocked IRC from the engineering dept so I'm hacking it through the mainframe or something
[22:51] <jcoxon> i'm blocked as well
[22:52] <jcoxon> i'm going through srcf
[22:52] <icez> blocked IRC?! how mean:p
[22:52] <Henry_> I've made a little doohickey that operates a servo after an adjustable period of time
[22:53] <Henry_> now to figure out how to get that servo to remove a pin or something else useful
[22:53] <jcoxon> we could use explosives :-p
[22:54] <Max0> hehe what about a wire from a toaster
[22:54] <Max0> n it burn through
[22:54] <Henry_> well, you're using explosives, and the last time I tried a hotwire everything got very wet
[22:54] <jcoxon> the pin approach might work then
[22:55] <Henry_> so I thought I'd go with something mechanical for the backup cutdown
[22:55] <Henry_> brb
[22:55] <Max0> wet?
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[22:57] <jcoxon> it landed in the sea
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[22:57] <Henry_> ok I really hope I didn't just spam the channel back then
[22:57] <jcoxon> nope nothing
[22:57] <Henry_> ok
[22:57] <Henry_> this client is confusing
[22:59] <jcoxon> bitchx?
[23:00] <Henry_> yup
[23:01] <Max0> what freqency are you guys using tomorrow?
[23:01] <Max0> as my scanner covers 200-500
[23:02] <jcoxon> 434mhz
[23:02] <Max0> reckon it would get to york?
[23:02] <Max0> 434.000?
[23:03] <jcoxon> umm not sure
[23:03] <jcoxon> rocketboy has the radio module
[23:04] <Henry_> I'm not sure which he's using but I'd guess one of 434.075 or 434.650
[23:05] <rocketboy> well its not working - and I don't think I'll be able to fix it in time - I'll bring my Peg III radio tracker thats on 434.075
[23:05] <jcoxon> oh rocketboy :(
[23:05] <Max0> ill tune my scanner in
[23:05] <jcoxon> my phone is working nicely
[23:05] <Max0> dont know if ill get it up in york tho
[23:06] <Henry_> oh dear :( I'd bring the spare Tracker3 but I can't find it in the lab, I think one of the guys took it to the TV shooting
[23:06] <jcoxon> rocketboy whats the plan then?
[23:06] <Henry_> Max, I think you've got a decent chance once it's above 10km or so
[23:07] <jcoxon> fly the payload or save it for another day?
[23:08] <Max0> are you sending gps info over it
[23:08] <Max0> or morse code
[23:08] <rocketboy> well I thinks is laurence's stuff, P IV + radio tracker from PIII (I can put that in its own box if required (its self powered) - or you may be able to find room
[23:09] <rocketboy> the tracker is just morse
[23:09] <jcoxon> i've got loads of space
[23:10] <Max0> where did you get the transmitter from?
[23:10] <Henry_> does Laurence have a radio transmitter at all?
[23:11] <jcoxon> nope - he was just tagging along
[23:11] <jcoxon> i've got a gumstix bumbling around
[23:11] <jcoxon> hehe
[23:11] <jcoxon> could be rigged to a radio if needs
[23:11] <Henry_> I have a couple of 434MHz transmitters
[23:12] <Henry_> but no TNC for them
[23:12] <Henry_> can you get the gumstix to output GPS location in morse code by toggling a pin?
[23:12] <jcoxon> toggle gpios :-D
[23:12] <jcoxon> oh yeah
[23:12] <jcoxon> easy as
[23:13] <Henry_> that would work with my little lego-brick sized transmitter
[23:13] <Henry_> the one we used on Nova 1
[23:13] <Henry_> I have the antenna from that as well, but there's no plug on the end
[23:14] <jcoxon> what freq is it?
[23:14] <Henry_> could bodge something together
[23:14] <Henry_> 434.75 I think
[23:15] <Henry_> want to bring the gumstix stuff over to the lab and give it a go?
[23:15] <Henry_> (sleep is for quitters)
[23:15] <Max0> hehe
[23:16] <jcoxon> Henry_ i'm pretty set up here if you want to come up here instead?
[23:17] <jcoxon> i will have to sleep eventually
[23:17] <jcoxon> damn we are missing one thing - a gps antenna
[23:18] <Henry_> I have one of those
[23:18] <Henry_> ish
[23:18] <jcoxon> it'll do
[23:18] <Henry_> what kind of connector do you need?
[23:18] <jcoxon> sma
[23:18] <Henry_> it has a heavily bodged smc
[23:19] <Henry_> is this the only GPS on the vehicle?
[23:20] <jcoxon> no no
[23:20] <jcoxon> i've got a gps onboard
[23:20] <jcoxon> to a phone
[23:20] <jcoxon> but i'm out of serial ports and gpios
[23:21] <jcoxon> and even if i did its important to keep it all seperate
[23:21] <Henry_> hm
[23:21] <Henry_> this antenna is so highly dubious that I'm not sure it's worth flying
[23:21] <jcoxon> hmmm i have a wifi antenna
[23:22] <Henry_> don't even think about it
[23:22] <Henry_> GPS is super super weak signal
[23:22] <Henry_> it needs just the right sort of antenna
[23:22] <jcoxon> well i've got a passive antenna just lacking a connector
[23:23] <Henry_> I think the best bet would be to find a spare GPIO on the router (you only need one pin)
[23:24] <jcoxon> grrrrr
[23:24] <jcoxon> there aren't any
[23:24] <Henry_> just one measly IO? (it's only wafer thin)
[23:25] <jcoxon> i've used the available ones up
[23:25] <jcoxon> for hte camera trigger and cutdown
[23:25] <jcoxon> the others really aren't available
[23:25] <Henry_> tricky soldering?
[23:25] <jcoxon> no i just can't find them
[23:25] <jcoxon> they are documented
[23:26] <jcoxon> actually i've got one left
[23:26] <Henry_> score
[23:26] <jcoxon> but
[23:26] <Max0> :)
[23:26] <jcoxon> as in it toggles a led light
[23:26] <Henry_> so?
[23:26] <jcoxon> i'm not sure if its actually accessible
[23:27] <Henry_> in software you mean?
[23:27] <jcoxon> yup
[23:27] <jcoxon> it toggles on the lights on the board
[23:27] <jcoxon> these are stupid double colour gpios
[23:27] <jcoxon> not normal
[23:27] <Henry_> what if I knock up a 555 circuit to run the camera trigger?
[23:28] <jcoxon> Henry_ i don't really want to change things at hte last minute
[23:28] <Henry_> er, double colour? if it's to drive a bicolour LED then it's probably just two GPIOs
[23:28] <Henry_> ok
[23:28] <jcoxon> but
[23:28] <jcoxon> give me one sec i have an idea
[23:29] <jcoxon> http://www.pegasushabproject.org.uk/P1010159.JPG
[23:29] <jcoxon> see the 5 big metal things next to the gps
[23:30] <jcoxon> the centre connects to the centre of the connector
[23:30] <jcoxon> and the others are ground
[23:30] <jcoxon> well the outside (is that ground?)
[23:30] <Henry_> yeah
[23:30] <jcoxon> can we not stuff the connector and go directly from there?
[23:30] <Henry_> yeah
[23:30] <Henry_> you'll lose a dB or two but it should be ok
[23:31] <jcoxon> and then Peg IV will be hte back up
[23:31] <Henry_> is it set up for an active or passive antenna?
[23:31] <jcoxon> its set up for active right now
[23:31] <Henry_> well I have my active
[23:31] <jcoxon> but its a matter of disconnecting the resistor
[23:31] <Henry_> but as I say, it's iffy
[23:31] <jcoxon> for passive
[23:31] <Henry_> have you had success with a passive before?
[23:31] <jcoxon> i have a passive which is not amazing
[23:32] <jcoxon> as in its a but budget
[23:32] <jcoxon> actually its very budget
[23:32] <Henry_> I could never get a passive to work
[23:32] <jcoxon> but we aren't relying on it are we
[23:32] <Henry_> James is it just a coathanger and a bit of masking tape?
[23:32] <jcoxon> haha
[23:32] <jcoxon> no its a bit better
[23:32] <jcoxon> its a proper gps antenna
[23:32] <Henry_> ok
[23:32] <jcoxon> as in ceramic or something like that
[23:32] <Henry_> well I would consider the GPS telemetry to be the primary, not the backup
[23:33] <Henry_> and it's a bit pointless having a backup that you expect to fail
[23:33] <Henry_> but, you're welcome to the antenna and the radio transmitter if you want them
[23:34] <Henry_> if I were you I'd scrub tomorrow, get it working better and wait for Steve to fix his kit, then go later in the week or at the weekend
[23:34] <jcoxon> hmmm
[23:34] <jcoxon> rocketboy?
[23:34] <Henry_> but I know Laurence is here, so that would be annoying
[23:34] <Henry_> you can have Churchill as a launch site with 24h notice
[23:38] <jcoxon> hmmmho
[23:38] <jcoxon> this needs thought
[23:38] <jcoxon> i reckon i could cobble a gumstix together
[23:38] <jcoxon> but it will be cobble
[23:39] <jcoxon> all i need is a radio module a power supply for it and also a battery pack holder either AAA or AA
[23:40] <Henry_> what's the output voltage of the gumstix gpio?
[23:40] <jcoxon> 3.3v
[23:41] <jcoxon> i've also got 3 serial ports at ttl leve
[23:41] <jcoxon> l
[23:41] <Henry_> 3v3 is fine
[23:41] <Henry_> is it a quad battery pack you need?
[23:41] <jcoxon> yup
[23:42] <Henry_> ok I have one of those in AA I think
[23:42] <Henry_> do you need the snap as well?
[23:42] <jcoxon> nope
[23:42] <jcoxon> got one build already
[23:42] <jcoxon> built*
[23:42] <jcoxon> (a snap is the connector i assume)
[23:43] <Henry_> well, the thing that snaps onto the battery pack and terminates in two wires
[23:43] <jcoxon> yup thats ready
[23:44] <Henry_> ok
[23:44] <Henry_> the radio module just has 3 wires, power, ground and morse
[23:44] <jcoxon> right then - just toggle the gpio
[23:44] <Henry_> unfortunately I snipped the wires off and they're about 1cm long now but I'll extend them
[23:44] <Max0> u guys know where i can get a 20 pin female conector with pre soldered wires?
[23:44] <jcoxon> okay
[23:45] <Henry_> what pitch/type of connector, Max0?
[23:45] <jcoxon> are we going to go for it? - Laurence reckons if we had a ttl gps he could wire it up to his payload
[23:46] <Max0> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=008&sspagename=STRK%3AMEWN%3AIT&viewitem=&item=180070408272&rd=1&rd=1
[23:46] <Max0> to go onto that
[23:47] <Max0> 2x10 pin
[23:48] <Henry_> get some 20-way ribbon cable and an IDC connector
[23:48] <Henry_> they're common as muck
[23:48] <Henry_> and about the easiest thing in the world to crimp, you just put the ribbon through the connector and squeeze it in a vice
[23:48] <Max0> sweet
[23:48] <Max0> maplin?
[23:48] <Henry_> ugh
[23:48] <Henry_> maybe
[23:49] <Henry_> but go with Rapid or Farnell unless you like throwing money away
[23:49] <jcoxon> henry_ laurence here, I've soldered straight onto the board with a gps cable before
[23:49] <Henry_> yeah that should work fine
[23:49] <jcoxon> works fine
[23:50] <Henry_> so do you want to use my active antenna which has a possibly dodgy connection at the antenna end, or your passive?
[23:50] <jcoxon> If the impedance interrupt is smaller than the wavelenght by a long way, it's not a serious problem
[23:50] <jcoxon> the reflected wave amplitude will be very small
[23:50] <jcoxon> lets test the active
[23:51] <Henry_> ok, thing is that I have about an hour's work left on the backup cutdown, and if I leave the lab to get the active from my room then I'll be locked out
[23:51] <jcoxon> right
[23:52] <jcoxon> so
[23:52] <jcoxon> i'll sort out some code
[23:52] <jcoxon> such as the parser etc
[23:52] <jcoxon> and also right some code to toggle the gpio
[23:52] <Henry_> have fun
[23:53] <jcoxon> okay - well when you are finished get in touch
[23:53] <Henry_> right
[23:54] <Max0> if u need a hand with any code give us a shout
[23:56] <jcoxon> thanks Max0
[23:56] <jcoxon> might need some help
[23:57] <Max0> np
[23:59] <jcoxon> rocketboy you there?
[23:59] ebola (n=ebola@host81-152-204-157.range81-152.btcentralplus.com) joined #highaltitude.
[00:00] --- Sun Jan 7 2007