[00:02] SpeedEvil (~user@tor/regular/SpeedEvil) left irc: Quit: Leaving. [00:03] oh cool [00:03] could use them to reinforce my model glider [00:16] Gnea (~gnea@unaffiliated/gnea) joined #highaltitude. [00:28] StrayVoltage (Tvilling@unaffiliated/twiner) left irc: Ping timeout: 276 seconds [00:28] CF is dirt cheap now [00:29] prob as cheap as glass fibre of you buy low quality from the right supplier [00:35] StrayVoltage (Tvilling@c4383BF51.static.bluecom.no) joined #highaltitude. [00:35] StrayVoltage (Tvilling@c4383BF51.static.bluecom.no) left irc: Changing host [00:35] StrayVoltage (Tvilling@unaffiliated/twiner) joined #highaltitude. [00:42] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: [00:59] SpeedEvil (1000@tor/regular/SpeedEvil) joined #highaltitude. [01:29] MrCraig (~Craig@host86-173-248-29.range86-173.btcentralplus.com) joined #highaltitude. 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[05:12] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Quit: Leaving [06:04] bah [06:04] all my engineering toolkit is at uni [06:04] so i can't play with these radiometrix modules [06:12] juxta|console (~juxta@ppp203-122-193-94.static.internode.on.net) joined #highaltitude. [06:48] kd0mto (~dago@j15-1.nat.iastate.edu) left irc: Quit: Leaving [06:52] Gnea (~gnea@unaffiliated/gnea) left irc: Ping timeout: 252 seconds [07:00] Jasperw1 (~jasperw@93.89.81.29) joined #highaltitude. [07:00] Jasperw (~jasperw@93.89.81.29) left irc: Read error: Connection reset by peer [07:01] Nick change: Jasperw1 -> jasperw [07:26] Simon-MPFH (~simon@phantom.mpfh.co.uk) joined #highaltitude. [07:34] Upu (~Upu@ubn.upuaut.net) joined #highaltitude. [07:58] DagoRed (~dago@ics129-198.icsincorporated.com) joined #highaltitude. [07:58] Nick change: DagoRed -> kd0mto [08:00] Gnea (~gnea@unaffiliated/gnea) joined #highaltitude. [08:37] kd0mto (~dago@ics129-198.icsincorporated.com) left irc: Quit: sleep [09:08] fsphil (~phil@2001:8b0:34:1:21f:c6ff:fe44:b25b) joined #highaltitude. [10:11] jasperw (~jasperw@93.89.81.29) left irc: Ping timeout: 265 seconds [10:22] Gnea (~gnea@unaffiliated/gnea) left irc: Ping timeout: 276 seconds [10:23] Jasperw (~jasperw@93.89.81.29) joined #highaltitude. [10:50] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) joined #highaltitude. [10:51] morning all [10:52] ohi [10:56] morning [10:57] Action: jcoxon has got a nice polystyrene box [10:57] very pleased [11:00] hot wire job? [11:00] nope [11:00] actually box [11:00] http://www.ferribox.co.uk/moulded/moulded.htm [11:00] got a spare one of jgc (he is occasionally on here) [11:04] Jasperw (~jasperw@93.89.81.29) left irc: Read error: Network is unreachable [11:06] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) left irc: Quit: This computer has gone to sleep [11:16] that is neat [11:20] Jasperw (~jasperw@93.89.81.29) joined #highaltitude. [11:21] heh i used something similar to that for mine [11:21] i just cut the walls thinner [11:28] how well does it cut? the stuff I'm using gets everywhere [11:29] heh [11:29] the stuff i was using cuts really well with a hot wire [11:30] I so gotta make one of those [11:30] pics somewhere [11:30] hang on [11:33] http://imgur.com/uKgOn.jpg [11:35] ah, neat job with the cutter - how much current are you passing through that? [11:36] I did a similar idea. [11:36] fsphil: 12V, about 2A i think [11:36] But I used an old table, with a hole in it, and hooked up to the attic [11:36] i forget now [11:36] worked well [11:36] Nichrome wire? [11:36] stainless in my case [11:37] Or maybe just steel, I forget [11:37] nichrome for that one [11:37] yea I seen someone on instructables using guitar string [11:37] Basically most sorts of non-copper wire that are reasonably strong work [11:52] i use nichrome [11:52] mine's setup like a jigsaw i suppose [11:52] hey juxta|console [11:52] heya Darkside [11:52] convince adrian to hook up his SDR-IQ to a dipole and set up access over the internet :D [11:53] what for? [11:53] http://b3ta.com/board/10189909 [11:53] Sort-of-related-but-not-really. [11:54] juxta|console: for geneeral HF reception [11:55] for fun! [11:55] heh [11:56] pretty much [11:56] since my antenna is shit :P [11:56] and his isn't [11:56] and i can just listen from his SDR :P [11:57] also so when i'm doing testing at uni, i can receive from somewhere else :P [11:57] it just requires him to forward a port [11:57] i'm getting a USRP in a few weeks too, i'm hoping to set up a HF antenna at uni and get the USRP hooked into a box that I can remote into [12:04] Darkside: i'll ask, but I think he'll be more inclined to if you get a callsign ;p [12:04] hahahaha [12:04] yes dammit [12:04] i'm working on this [12:04] after exams, there's about 5 of us who are going to run a workshop thingo where we go over the course, then take our exams [12:04] i've got 2 lecturers extremely interested already [12:05] we have one WIA assessor inside uni, just need to get another one in [12:05] probably paul hoffman [12:52] LazyLeopard (~irc-clien@chocky.demon.co.uk) joined #highaltitude. [13:02] MoALTz (~no@92.10.171.11) left irc: Quit: Leaving [13:10] Simon-MPFH (~simon@phantom.mpfh.co.uk) left irc: Quit: Leaving [13:33] juxta|console (~juxta@ppp203-122-193-94.static.internode.on.net) left irc: Quit: Leaving. [13:35] MoALTz (~no@92.0.15.8) joined #highaltitude. [13:44] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [14:02] m1x10 (m1x10@ppp089210074066.dsl.hol.gr) joined #highaltitude. [14:04] hi all [14:08] afternoon [14:13] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 276 seconds [14:18] MoALTz (~no@92.0.15.8) left irc: Quit: Leaving [14:19] I went to an semi-IT conference today [14:20] They shows something neat [14:20] but I didnt understand if they build it or just buy it and use it [14:21] it was a black pin thing [14:21] you attach it on a piece of paper [14:21] and you use its "pen" [14:21] you write something on the paper [14:22] and that things appears to an application on the pc [14:22] they digitalize the writing [14:22] if i can say that word [14:23] special paper? [14:23] im not sure [14:23] but the pen + pin + usb IR sensor was a kit [14:23] MoALTz (~no@92.0.15.8) joined #highaltitude. [14:23] i think it was a normal paper [14:24] those things exist in the market? [14:25] never heard of it -- closest thing I know is the graphics tablet [14:25] link? [14:26] www.google.com :p [14:26] brb, food! [14:30] lol [14:38] jan_bangna (~jandetlef@ppp-124-120-162-67.revip2.asianet.co.th) joined #highaltitude. [14:57] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [15:01] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 240 seconds [15:05] there are pens on the market that will digitize handwriting [15:05] you use paper which looks like regular paper, but it's covered in a unique small dot pattern, the pen tracks its location with a small optical sensor [15:06] i forget the brand name though [15:23] jan_bangna (~jandetlef@ppp-124-120-162-67.revip2.asianet.co.th) left irc: Quit: jan_bangna [15:24] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [15:27] i wonder if you could use an imu in the pen for that [15:28] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 245 seconds [15:29] I thought about that ages ago [15:29] back when MEMs accels had just come out [15:29] prob too much drift, but itd help [15:30] some small IR leds and cameras would be better [15:30] gyro perhaps most suitable. [15:30] or ultrasound [15:30] indeed [15:31] anyone know if the launch is still going ahead next weekend? [15:32] http://www.lboro.ac.uk/departments/cm/research/NMR/cut_magnet.html <- interesting [15:33] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [15:34] Interesting. [15:35] GeekShadow (~Antoine@reactos/tester/GeekShadow) joined #highaltitude. [15:36] Upu (~Upu@ubn.upuaut.net) left irc: Read error: Connection reset by peer [15:36] Jasperw (~jasperw@93.89.81.29) left irc: Quit: Leaving. [15:38] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 272 seconds [15:38] Upu (~Upu@ubn.upuaut.net) joined #highaltitude. [15:39] chris_99 (~chris_99@87.114.150.39.plusnet.thn-ag1.dyn.plus.net) joined #highaltitude. [15:39] chris_99 (~chris_99@87.114.150.39.plusnet.thn-ag1.dyn.plus.net) left irc: Changing host [15:39] chris_99 (~chris_99@unaffiliated/chris-99/x-3062929) joined #highaltitude. [15:42] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [15:42] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Read error: Connection reset by peer [15:43] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [15:43] http://www.instructables.com/id/How-to-build-a-thermoelectric-lamp/ [15:47] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 255 seconds [15:52] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. 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[16:59] pretec (~Matthias@port-92-195-118-217.dynamic.qsc.de) joined #highaltitude. [16:59] Hi [16:59] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 255 seconds [17:04] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:08] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 255 seconds [17:13] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:16] hi [17:17] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 240 seconds [17:19] hi [17:22] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:25] MrCraig (~Craig@host86-176-41-89.range86-176.btcentralplus.com) left irc: Quit: Leaving [17:26] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 240 seconds [17:30] Gnea (~gnea@unaffiliated/gnea) left irc: Ping timeout: 240 seconds [17:31] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:32] jonsowman_mob (~jonsowman@212.183.140.45) joined #highaltitude. [17:35] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 240 seconds [17:36] jonsowman_mob (~jonsowman@212.183.140.45) left irc: Client Quit [17:38] WillD_ (~will@host86-132-12-37.range86-132.btcentralplus.com) left irc: Quit: Ex-Chat [17:40] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:45] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 272 seconds [17:49] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [17:54] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 265 seconds [17:58] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [18:02] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 255 seconds [18:06] Zuph (~Zuph@96-28-231-112.dhcp.insightbb.com) joined #highaltitude. [18:07] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [18:10] Gnea (~gnea@unaffiliated/gnea) joined #highaltitude. [18:12] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 272 seconds [18:13] Progress on a custom tracking interface! http://whitestarballoon.com/vis/vis.html [18:16] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [18:21] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) left irc: Ping timeout: 276 seconds [18:23] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [18:25] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Client Quit [18:25] Guest5899 (~smealum@85-171-205-215.rev.numericable.fr) joined #highaltitude. [18:35] fsphil, what bootloader you got on 644? [18:36] don't use any m1x10, my program is flashed onto the chip directly through the ISP header [18:37] ok [18:38] Action: m1x10 must learn not to use arduinos [18:40] kd0mto (~dago@j15-1.nat.iastate.edu) joined #highaltitude. [18:41] you'll need a programmer, sparkfun have a few [18:43] The AVR dragon is the best $50 an aspiring AVR developer can spend. [18:48] I know we've done this discussion lots of time before [18:48] MoALTz (~no@92.0.15.8) left irc: Ping timeout: 240 seconds [18:52] MoALTz (~no@92.0.15.8) joined #highaltitude. [18:53] Hiena (~Hiena@81.93.195.181.datatrans.hu) joined #highaltitude. [18:53] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) joined #highaltitude. [18:54] evening [18:56] gday [18:56] hi [18:58] urgh work tomorrow [18:59] yea know that feeling [19:00] need to crack this PID temp controller tonight [19:00] are you getting it to heat up yet? [19:01] i'm on to the software bit yeah [19:01] though have run out of space on my atmega168 so need to switch to a 328 [19:02] ram or rom? [19:02] rom [19:06] GW8RAK (~chatzilla@client-86-31-217-222.oxfd.adsl.virginmedia.com) joined #highaltitude. [19:06] can't wait to see what effect this will have on the frequency [19:07] i'm just worried it'll mess something up [19:07] nah, I think the worse that can happen is it uses up battery power a bit faster [19:10] grrr the old cusf predictor is bust [19:21] right PID running [19:21] now to tune it [19:22] what sort of ranges should people be using for P, I and D? [19:23] is it not just a simple matter of, if(temp < lowtemp) heat++;, and vice-versa? [19:24] the risk is big temp shifts [19:24] ideally i want it to stabalise [19:27] I suppose the main job is to smooth out the frequency variations rather than curing it totally [19:28] hmm, this isn't as easy as I'd thought it might be [19:29] my thinking is to set a realistic setpoint [19:29] say -10 [19:30] then have the controller try and maintain it there [19:32] so only switch it on if it falls below -10, and apply more current the further it gets below that point? [19:33] GW8RAK (~chatzilla@client-86-31-217-222.oxfd.adsl.virginmedia.com) left irc: Remote host closed the connection [19:33] yes [19:33] http://www.arduino.cc/playground/Code/PIDLibrary [19:35] You'll just have to test it out to tune the pid values [19:35] Or use one of those tuning algorithms [19:40] jcoxon: still launching next saturday? [19:42] jcoxon: if you dont have a freezer, how can you test it at -10C setpoint? [19:42] id suggest 35C or something [19:42] Laurenceb, i've got a freezer [19:42] ah cool [19:42] just currently playing with testing at 28 deg [19:42] just to understand how it all works [19:42] as i've never used it before [19:43] still launching saturday? [19:43] yeah, depends on the prediction really [19:45] yeah thas how it goes [19:45] im working on a properly built sdr atm [19:45] wunderground is suggesting a trip to france [19:46] got the enclosure and front panel finished [19:46] but thats not too much of a problem as can get a notam [19:46] need to wait for my ftdi cable and ferrites to arrive from farnell [19:46] i might come along to the launch, or maybe setup somewhere where i can get a signal [19:47] dont know atm [19:47] no worries [19:47] if im ready in time [19:47] at least france doesn't have much in the way of large lakes [19:50] it it floats properly, it could end up a fair distance away though [19:50] if* [20:04] time for freezer test [20:04] set point = 0 deg [20:07] how are you attaching the resistor/ [20:08] a transistor [20:08] or do you mean to the radio? [20:09] yes [20:09] onto the xtal case? [20:09] my plan is to hot glue them [20:09] currently they sit right underneath in contact [20:10] if you are interested: http://m6jcx.no-ip.org/dl-fldigi-XMLRPC/index.html [20:10] why not use a heatsunk transitor [20:11] cause when i was laying out the board that was the method i went with [20:11] with more research i see the possibilities [20:11] if you used a transitor youd have a nice heatsink tab to fix onto the xtal case [20:12] yeah [20:17] i wonder if theres a clever way to do this with VCO/PLL [20:20] junderwood varied his input voltage to the ntx2 to try and maintain the freq [20:21] yeah [20:22] in the freezer atm? [20:22] yup [20:23] is the pid working? [20:23] how are you getting temperature feedback? [20:23] ds18b20 sensor [20:23] it looks stable to me [20:23] the heater isn't on right now [20:24] oh lol [20:24] you see the 0.00 inbetween the semi-colons [20:24] thats the PID output [20:25] obviously not got the tuning right [20:34] pah its really not working [20:36] MrCraig (~Craig@host81-159-153-53.range81-159.btcentralplus.com) joined #highaltitude. [20:39] personally id just write it from scratch [20:39] its really not that hard [20:39] remeber to link the math lib? [20:44] yup [20:44] it was working when aiming for 30 deg C [20:44] just not 0 [20:44] using a library? [20:44] yup [20:45] http://www.arduino.cc/playground/Code/PIDLibrary [20:45] eek doubles [20:46] i didnt even realise anyone had got double precision working [20:46] its the same as float [20:46] http://www.arduino.cc/en/Reference/Double [20:47] that seems silly [20:47] double usually is 64bits [20:47] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) joined #highaltitude. [20:48] ooo its doing something [20:52] who, me? [20:52] hehe now my pid controller [20:52] my flight computer is in the fridge [20:52] oh, not me :( [20:52] cool [20:52] sorry freezer [20:52] http://m6jcx.no-ip.org/dl-fldigi-XMLRPC/index.html [20:52] lol testing components at low temps? [20:52] do does it keep same temp? [20:52] *so [20:53] not really [20:53] yet... [20:53] is anyone here working with PIC's? [20:53] don't click on the waterfall! [20:53] as it actually works [20:54] bbl [20:54] natrium42 (~natrium@CPE000625d867e2-CM0014045885be.cpe.net.cable.rogers.com) left irc: Quit: Leaving [20:54] hmmm so i need it to react quicker it seems [21:04] is it actually heating it up ok? [21:05] it still needs to be made into a single 'thermal mass' [21:05] but i was just making sure that the code does 'sort' of work [21:14] oooo its recovered, pulling the temperature up a bit [21:14] RocketBoy (~steverand@217.47.75.8) joined #highaltitude. [21:14] evening RocketBoy [21:14] just got your email [21:15] cool - sorry its not better news [21:15] yeah [21:15] well we'll have to see [21:16] its not an urgent launch [21:16] yeah - I'll check status midweek [21:17] RocketBoy, got my ntx2 crystal to stabilise at 2deg (in the freezer currently which is -8) [21:18] RocketBoy: is EARS today or next weekend? [21:19] eroomde: ~Probably - but it depends on how other things go [21:20] ok. if it happens would there be fireworks? [21:20] jcoxon: cool - thats the way to go temp stabilise the crystal and the surrounding components (inc varicap) if possible. [21:21] yes there will be fireworks - probably our best so far [21:22] seems pretty stable re: freq - have turned off the AFC and its holding still [21:22] i think rather annoyingly i might miss it. unless i drive up on sunday afternoon [21:22] the event will go aheah - even if I/m not there [21:23] chris_99 (~chris_99@unaffiliated/chris-99/x-3062929) joined #highaltitude. [21:23] eroomde: pity if you miss it it'll be good [21:23] what time would they be on Sunday evening? [21:24] we've got some family friends for lunch, that's all. but I could drive up after if I take it easy at lunch [21:24] jcoxon: there'd be a lift in it too if you fancy. Or a lift home if you're still up in cam [21:24] normally just after it goes dark - but sometimes delayed depending on how the set-up goes [21:25] eroomde, cool - might be already there - shall have to see about if my launch goes ahead [21:26] might bring up some chinese lanterns [21:28] cool Idea - I have a few that I need to use up too - I'll see what the landowner thinks of them [21:28] RocketBoy: I need to get my level 1 as we might be using rockets at work. do you know which month next year ears is likely to resume? [21:28] yeah i've not launched them before but i was going to do some on saturday night next week as we're not really bothering with fireworks this year [21:29] eroomde:yeah we go March to December (Jan & Feb off) [21:30] h'ok cool [21:30] thanks [21:34] The-Compiler (~compiler@unaffiliated/the-compiler) left irc: Quit: Erection reset by queer [21:35] The-Compiler (~compiler@the-compiler.org) joined #highaltitude. [21:35] The-Compiler (~compiler@the-compiler.org) left irc: Changing host [21:35] The-Compiler (~compiler@unaffiliated/the-compiler) joined #highaltitude. [21:37] m1x10 (m1x10@ppp089210074066.dsl.hol.gr) left irc: Quit: If you run you only gonna die tired [21:56] gb73d (gb73d@79-79-158-177.dynamic.dsl.as9105.com) left irc: Quit: Whoosh we're gone [22:05] I wish getting chemicals was easy. I just want a few grams of K2ZrF4 - for experiments in Al/C composites. [22:11] very chilly flight computer [22:11] hi jcoxon [22:11] how chilly is chilly? [22:12] -8 [22:12] just got it out of the freezer [22:12] nice [22:12] and did the xtal stay warm? [22:12] managed to keep the module stable at ~+4 degC [22:12] :) [22:12] though the shift changed [22:13] as i'm only really heating the crystal [22:13] yeah [22:14] jonsowman, cusf got any spare balloons right now [22:14] ? [22:14] not sure, i'll email the list and check the lab tomorrow [22:14] adsized (quassel@2001:41d0:1:c1c2::cafe) left #highaltitude ("http://quassel-irc.org - Chat comfortably. Anywhere."). [22:16] what size were you after ideally? 1500g? [22:16] yeah [22:16] alright [22:16] >= 1kg [22:16] okay [22:16] hmm [22:16] be careful what you with for [22:17] < 3kg [22:17] as i know we have some >>1kg balloons in there [22:17] :) [22:17] i'll go look tomorrow [22:18] thanks [22:19] if all else fails I've got a 1kg balloon [22:24] I'am still looking for a balloon supplier in germany. As far as i know now i have to order in Uk or USA [22:38] GeekShadow (~Antoine@reactos/tester/GeekShadow) left irc: Quit: The cake is a lie ! [22:39] jcoxon (~jcoxon@cpc1-lanc4-0-0-cust720.3-3.cable.virginmedia.com) left irc: Quit: Leaving [22:41] anyone up for a spot of electonics diagnosis / speculation? http://pastebin.com/GCaPW8Qh [22:45] MrCraig: you can't use a potential divider to provide a stable voltage supply [22:45] I think that's what you're describing there [22:45] three series resistors? [22:45] it's possible too that the PIC is not configured to use its internal oscillator [22:46] yes, it doesn't work like that [22:46] you'll end up with the correct potential at the point _provided_ you draw no current [22:46] which is clearly not helpful [22:46] to get your 13V8 down to 5V you need a proper regulator [22:47] ok, either that or I need to use a different power supply, I have a battery casing for two 3v cells, that ought to do it [22:47] as a rule of thumb it's good enough to keep the tap current < 1/10th of the current through the two resistors. But that would be a ludicrously inefficient way of doing things [22:48] and I need to check the chip config for internal oscilator [22:48] GeekShadow (~Antoine@reactos/tester/GeekShadow) joined #highaltitude. [22:48] yes two fresh batteries should be alright, though if you can find a 3xAA(A) one it'd be better [22:48] I was thinking two double A [22:49] you should get away with it, but that's 3V nominal which is right on the lower bound [22:49] you might find it triggers brownout detection or what have you if the terminal voltage drops at all under load [22:49] I see [22:50] as I said, 3xAA would be preferable if you can hack them together :) [22:50] I do have an adjustable DC supply with a 4.5v setting, the only down side to using it is that it's connector is a typical DC jack so I'd need to be ham handed to connect it to a breadboard. [22:51] heh [22:51] I guess I could series three AA's [22:51] worse things have been done [22:52] i'm certain I've done them :-P [22:52] :D [23:04] LazyLeopard (~irc-clien@chocky.demon.co.uk) left irc: Quit: Bye [23:06] Well it's gone 11pm and I have a presentation to give tomorrow that I'm hidiously under prepared for - I guess this is good night for now. Thanks for the advice :-) [23:06] MrCraig (~Craig@host81-159-153-53.range81-159.btcentralplus.com) left irc: Quit: Leaving [23:12] RocketBoy (steverand@217.47.75.8) left #highaltitude. [23:24] Upu (~Upu@ubn.upuaut.net) left irc: [23:30] Hiena (~Hiena@81.93.195.181.datatrans.hu) left irc: Remote host closed the connection [23:34] juxta (Bogaurd@ppp203-122-193-94.static.internode.on.net) joined #highaltitude. [23:44] vaulner (58122e9c@gateway/web/freenode/ip.88.18.46.156) joined #highaltitude. [23:45] hey guys [23:45] i'm looking to buy a gps module [23:45] what do you think of em406? [23:45] SpeedEvil1 (~user@tor/regular/SpeedEvil) joined #highaltitude. [23:47] they are fairly okay [23:47] I seem to remember them cutting out above 18km or so [23:47] but tend to get lock back again and such [23:48] SpeedEvil (1000@tor/regular/SpeedEvil) left irc: Ping timeout: 265 seconds [23:49] it is easier to find it than lassen iq [23:49] or copernicus [23:49] so I think i will give it a try [23:56] Nick change: SpeedEvil1 -> SpeedEvil [00:00] --- Mon Nov 1 2010