highaltitude.log.20100907

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[01:05] <griffonbot> Received email: Terry <bogaurd@gmail.com> "Re: Tracking System Help"
[01:14] <griffonbot> Received email: Ed Moore <eam52@cam.ac.uk> "Re: Tracking System Help"
[01:15] <Darkside> hmm
[01:15] <Darkside> whats this mailing l ist?
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[06:24] <fsphil> Darkside, http://groups.google.com/group/ukhas
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[07:39] <russss> so
[07:39] <russss> this is the Copenhagen Suborbitals rocket http://i.imgur.com/V3DF6.jpg
[07:39] <russss> note the failed lox valve in the centre, and the heating unit (a.k.a hairdryer) in the bottom left.
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[07:45] <m1x10> good morning ppl
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[09:18] <rharrison> SpeedEvil, do you have that link handy for that ultralight aircraft?
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[10:18] <SpeedEvil> http://www.rcgroups.com/forums/showthread.php?t=961876 do you mean?
[10:18] <SpeedEvil> Or http://en.wikipedia.org/wiki/CriCri
[10:29] <griffonbot> Received email: f6agv@free.fr "Re: Tracking System Help"
[10:30] <griffonbot> Received email: Lee West <aiqy65@googlemail.com> "Re: Tracking System Help"
[10:41] <rharrison> SpeedEvil, yep perfect
[10:47] <SpeedEvil> Hmm. I question if the bot doing email addresses is a good idea. Are there public logs?
[10:48] <Randomskk> arguably google group's archive is public and also has addresses, doesn't it?
[10:48] <SpeedEvil> no
[10:48] <SpeedEvil> It redacts them\
[10:50] <russss> it asks you for a captcha before it lets you read them
[10:51] <Randomskk> ah
[10:52] <russss> btw, link from earlier: http://i.imgur.com/V3DF6.jpg
[10:52] <russss> note the hairdryer - apparently that was what failed
[10:53] <SpeedEvil> umm...
[10:54] <SpeedEvil> lol.
[10:54] <SpeedEvil> Really?
[10:54] <russss> I think it actually stopped working due to the low battery voltage actually.
[10:54] <russss> -actually
[10:55] <russss> I love that they've got a really expensive-looking compressed air butterfly valve with a hairdryer to keep it warm.
[10:57] <Upu> I'm all for pushing the boundaries but I don't think I'd be getting on top of that
[10:57] <Upu> call me crazy
[10:58] <SpeedEvil> Well...
[10:59] <SpeedEvil> The design is such that it can actually be launched a really significant amount of times for little money
[10:59] <SpeedEvil> So - for example - flying it 100 times is not impossible.
[10:59] <Upu> but a hair dryer ?
[10:59] <SpeedEvil> :)
[10:59] <SpeedEvil> yeah
[10:59] <SpeedEvil> I assume that's expedient
[11:00] <Upu> heh
[11:00] <SpeedEvil> a proper block heater would cost $50 or so
[11:00] <Upu> anyway afk :)
[11:00] <SpeedEvil> wave
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[11:55] <LeeW> Good afternoon, do we have any Ardunio software experts on today who can help a newbie?
[11:57] <Randomskk> ask away
[11:58] <Randomskk> not that I claim to be an expert or anything.
[12:00] <Upu> yeah ditto
[12:00] <Upu> anyone got Rocketboys mail address ?
[12:02] <fsphil> Upu, it's on the site -> http://www.randomsolutions.co.uk/Random_Engineering/Contact.html
[12:03] <Upu> cheers
[12:05] <LeeW> We have a Ardunio board coming tomorrow ready to graft onto a Falcom GPS module
[12:06] <LeeW> Reading the words it need to be put into the correct mode, as per the code on UKHAS guide
[12:06] <LeeW> Putting bits of code into the ardunio complier (first glance this morning, oh heck...) it keeps chucking out a compile error
[12:07] <LeeW> sendUBX' was not declared in this scope
[12:08] <LeeW> Google throws up notning and I can not make any sense of anything on the ardunio forum (but if I am not carful this is going to get addictive)
[12:08] <LeeW> The intention is to try initialise the thing and then run the 'ferret2' code to get rtty down to the ground (well thats the grand idea)
[12:09] <Upu> put your code up
[12:09] <Upu> http://pastebin.com/
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[12:11] <LeeW> its the on taken directly from the ukhas guide http://ukhas.org.uk/guides:falcom_fsa03
[12:11] Nick change: Mike -> Guest74792
[12:11] <Upu> yeah but I need to see in context
[12:12] <Upu> #include <NewSoftSerial.h>
[12:12] <Upu> NewSoftSerial nss(3, 2);
[12:12] <Upu> don't think that's right any more
[12:12] <Upu> #include <SoftwareSerial.h>
[12:13] <LeeW> pasted up, look for LeeW
[12:13] <Upu> SoftwareSerial GPS = SoftwareSerial(GPS_TX, GPS_RX);
[12:13] <LeeW> doing it bit by bit as its a very big learning curve that started this morning
[12:14] <Upu> http://pastebin.com/x2Zi3Ccq
[12:14] <Upu> you are missing the SendUBX function
[12:14] <Upu> corrected above
[12:17] <LeeW> got that thanks
[12:19] <LeeW> will pop it in and see what it does now
[12:22] <LeeW> different error now "error compiling" core.a(main.cpp.o): In function `main':
[12:26] <Upu> what line is the error on ?
[12:28] <LeeW> posted error up
[12:28] <LeeW> http://pastebin.com/J2swZNxf
[12:29] <LeeW> no line details
[12:33] <Upu> I can take a look remotely using our remote support software if you want
[12:33] <Upu> but can't see much from there
[12:34] <LeeW> can do
[12:34] <Upu> 1 sec let me login
[12:34] <Randomskk> uhm
[12:34] <Randomskk> the second line of that is more significant
[12:34] <Randomskk> what's your current whole source?
[12:34] <Randomskk> you seem to have just not made a loop function
[12:34] <Randomskk> e.g. your code needs, at the least, void init() {
[12:35] <Randomskk> and also void loop() {}
[12:35] <Upu> oh yeah that would help
[12:35] <Upu> lol
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[12:36] <Upu> hm
[12:38] <LeeW> so where does the void sendUBX bit go in relation to the whole long script (I just chopped the first bit to play with)
[12:40] <Randomskk> top
[12:44] <LeeW> ok, putting it at the top, lets see what that spits out
[12:45] <Randomskk> you still need a loop() function
[12:46] <LeeW> what line? http://pastebin.com/zKrCjz4b
[12:47] <Randomskk> you appear to have a loop function, so that's fine. what happens when you compile now?
[12:48] <LeeW> sketch_sep07a.cpp: In function 'void sendUBX(uint8_t*, uint8_t)':
[12:48] <LeeW> sketch_sep07a:72: error: redefinition of 'void sendUBX(uint8_t*, uint8_t)'
[12:48] <LeeW> sketch_sep07a:5: error: 'void sendUBX(uint8_t*, uint8_t)' previously defined here
[12:50] <Randomskk> right, you have the sendUBX function twice
[12:50] <Randomskk> you only need it once
[12:50] <Randomskk> delete it from around line 72
[12:54] <LeeW> wow, it compiled, better save that quick
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[12:58] <LeeW> now to graft ferret onto the bottom, hope we get our hands on the board tomorow to put it into, thanks gents
[12:59] <Randomskk> no problem
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[13:00] <moriarty> so, anyone heard about those space jumpers?
[13:01] <moriarty> any idea what's going to happen past the mach barrier?
[13:04] <SpeedEvil> It's been done before
[13:04] <SpeedEvil> IIRC
[13:04] <moriarty> no it hasn't
[13:04] <SpeedEvil> Also - there were the SR71 ejections
[13:04] <moriarty> if you're thinking about kittinger, he didn't break it
[13:04] <SpeedEvil> Which were >>mach 1
[13:04] <moriarty> more like, nine-tenths
[13:04] <SpeedEvil> fair enough.
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[15:19] <m1x10> anyone here to explain something about pulldown resistors?
[15:19] <m1x10> ping *
[15:19] <m1x10> :p
[15:19] <SpeedEvil> Sure
[15:20] <m1x10> ah SpeedEvil
[15:20] <m1x10> i love irc
[15:20] <m1x10> well look
[15:21] <m1x10> let me tell the prologue first
[15:21] <m1x10> my arduino servo is trembling because of some kind of noise
[15:21] <m1x10> in the pin 9 line
[15:22] <m1x10> so someone at #sparkfun suggested putting a pulldown
[15:22] <m1x10> i did and the trembling stopped
[15:22] <m1x10> http://imagebin.org/113075
[15:22] <SpeedEvil> I wonder if you're having problems with an unstable cock.
[15:22] <SpeedEvil> clock
[15:22] <SpeedEvil> oh - not then
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[15:22] <m1x10> look at the pic
[15:22] <SpeedEvil> Check the configuration of the output.
[15:23] <m1x10> I just want someone to explain me how that works
[15:23] <SpeedEvil> The pin should usually be configured so that it has both high and low drivers enabled
[15:23] <SpeedEvil> What value of pulldowns are you using?
[15:24] <m1x10> 10k
[15:24] <m1x10> I want to understand how currect is moving there
[15:24] <SpeedEvil> What is the pin 9 line
[15:24] <SpeedEvil> Do you have a scope?
[15:24] <m1x10> no
[15:24] <m1x10> just multimeter
[15:24] <SpeedEvil> this is a normal RC servo?
[15:24] <m1x10> yeah
[15:24] <m1x10> from sparkfun
[15:25] <m1x10> im using NSS
[15:25] <m1x10> and could disturb it
[15:25] <m1x10> i heard there is an issue
[15:25] <SpeedEvil> NSS?
[15:25] <m1x10> newsoftserial lib
[15:25] <SpeedEvil> I have no knowledge of the arduino software, but some of the underlying micro.
[15:26] <m1x10> ok but i just want to tell me how that works
[15:26] <m1x10> the pulldown settles the voltage at pin9 to 0v
[15:26] <m1x10> correct?
[15:26] <SpeedEvil> Pulldowns are used where there is no driver to pull the output voltage down to 0.
[15:26] <SpeedEvil> In many micros, the drivers on the output pin can be turned off for the high or low side.
[15:27] <SpeedEvil> This means that it requires that external resistors are used to supply this direction.
[15:27] <SpeedEvil> I would strongly recommend reading the actual datasheet of the device you're using.
[15:28] <SpeedEvil> The underlying AVR.
[15:29] <m1x10> so the pulldown pulls the voltage at 0v on this pin. right?
[15:29] <SpeedEvil> I question why it works.
[15:30] <m1x10> ...
[15:30] <SpeedEvil> The AVR should be configured by the arduino software in a manner which will make the pulldown irrelevant.
[15:30] <SpeedEvil> If it's requiring the pulldown to work, there is something strange going wrong.
[15:30] <m1x10> No
[15:30] <m1x10> it does not require
[15:30] <SpeedEvil> requiring to wor
[15:30] <SpeedEvil> k
[15:31] <SpeedEvil> It should not affect the timing enough to matter at all.
[15:32] <m1x10> anyway
[15:32] <SpeedEvil> Do you have copious decoupling, and have you tried running the servo from a seperate power supply
[15:33] <m1x10> no
[15:33] <m1x10> i just know that when NSS is used by my code the servo trembles
[15:33] <SpeedEvil> NSS?
[15:33] <SpeedEvil> Oh
[15:33] <m1x10> and ppl from sparkfun told me there is an issue with NSS and servos that make that thing
[15:33] <SpeedEvil> well - you're wading through layers of abstraction, without understanding what's going on with the hardware
[15:33] <m1x10> so its known thing
[15:35] <SpeedEvil> The problem is that the nice tidy softwareserial() calls you're using obscure the fact that you're using a very complex bit of software - the serial software stack - which imposes apparantly undocumented limitations on the other code.
[15:35] <m1x10> to control the servo I write to OCR1A register
[15:35] <m1x10> yes
[15:35] <m1x10> I have put many things on this arduino
[15:35] <SpeedEvil> For example, it will use interrupts and will randomly delay other bits of code, while it executes the software serial struff
[15:35] <SpeedEvil> Use the hardware serial, and all these problems go away
[15:35] <m1x10> yes its a interrput issue
[15:36] <SpeedEvil> hardware serial takes perhaps 1/100th of the CPU.
[15:36] <m1x10> but i need hardserial I think for printing messages and uploading the code...
[15:36] <m1x10> ???
[15:37] <SpeedEvil> That's a limitation of the arduino software.
[15:37] <SpeedEvil> It's not inherent in the chip.
[15:37] <m1x10> yeah, but i dont have any other way to upload the code
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[15:38] <SpeedEvil> Can you access trhe normal hardware serial pins?
[15:38] <m1x10> hmm
[15:38] <m1x10> let me try something
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[15:50] <m1x10> bah
[15:51] <m1x10> "Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the FTDI USB-to-TTL Serial chip."
[15:51] <m1x10> so arduino takes those pins from avr mc
[15:51] <m1x10> so I dont have hardserial
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[15:57] <Randomskk> what, yes you do, pins 0 and 11
[15:57] <Randomskk> 1*
[15:57] <Randomskk> you can use them perfectly normally
[15:58] <m1x10> but it says they are connected to ftdi chip
[15:58] <m1x10> i do: char a = Serial.read(); Serial.print(a);
[15:58] <m1x10> and i get shit !
[16:02] <m1x10> what am i doing wrong?
[16:02] <Randomskk> it doesn't matter that they are on the ftdi. it still works normally
[16:02] <Randomskk> check your serial settings, baud etc.
[16:02] <m1x10> well in this case i want to read from gps
[16:03] <m1x10> i have never used the hardware serial
[16:03] <m1x10> to do it
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[16:08] <Laurenceb> http://www.memsoptical.com/prodserv/products/twotiltmir.htm
[16:08] <Laurenceb> ^ useful for a laser link
[16:08] <Laurenceb> even breadboard friendly lol
[16:20] <SpeedEvil> neat
[16:20] <SpeedEvil> What's the price?
[16:20] <SpeedEvil> I assume ruinous?
[16:21] <Laurenceb> http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=mems+mirror&x=0&y=0
[16:22] <Laurenceb> that ones cheapish, but single axis
[16:22] <SpeedEvil> That is not hideous
[16:22] <Laurenceb> oh moq 50 :(
[16:23] <SpeedEvil> 29KHz - nice
[16:23] <SpeedEvil> resonant of course
[16:23] <SpeedEvil> I would quite like that for my laser scanner
[16:24] <Laurenceb> i was actually looking for an order of magnitude faster...
[16:24] <SpeedEvil> for?
[16:24] <Laurenceb> not sure if thats possible
[16:24] <Laurenceb> doppler lidar
[16:24] <SpeedEvil> resonant - should be
[16:25] <Laurenceb> for tomographic fluid flow using suspended particles
[16:25] <Laurenceb> aka dust
[16:27] <Laurenceb> saw some kit for doing it that used crazy expensive custom ASICs
[16:28] <Laurenceb> CMOS with an ADC and processing built onto the back of each pixel
[16:28] <Laurenceb> was thinking of a way to do it with a single APD and scanned laser
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[16:29] <Laurenceb> IIRC DARPA built something similar for tracking down snipers
[16:30] <Laurenceb> as the bullets leave a trail of fast moving dust particles
[16:32] <Laurenceb> but you could maybe do it in minature with one of those scanners + photodiode + fpga
[16:32] <SpeedEvil> oh - neat
[16:32] <SpeedEvil> hmm
[16:32] <SpeedEvil> ...
[16:33] <SpeedEvil> I assume a rolling shutter imager won't work
[16:36] <Laurenceb> you need enough data to fft each pixel
[16:37] <Laurenceb> and look at the 100hz to 20Khz frequency range
[16:37] <SpeedEvil> ah
[16:37] <Laurenceb> and also get >20fps to avoid blur
[16:37] <Laurenceb> so actually you need >1Kfps with the laser scan
[16:38] <Laurenceb> about 10ns per pixel scanned for 300px square image
[16:38] <SpeedEvil> umm
[16:38] <Laurenceb> then you fft and reduce down to 20fps
[16:38] <SpeedEvil> 10ns/pixel sounds like you're going to need a _stupid_ light incidence
[16:38] <Laurenceb> you can use interlacing to get higher frequencies
[16:38] <Laurenceb> nope
[16:38] <Laurenceb> 10mw laser will do
[16:39] <Laurenceb> for 25cm or so range, enough to be useful
[16:39] <Laurenceb> http://sales.hamamatsu.com/index.php?GLBSESSID=67edjksdcsaeehg1pvrt8fme31#form
[16:39] <SpeedEvil> what's this for? To visualise airflow around the sensor?
[16:39] <Laurenceb> S8664-30K
[16:40] <Laurenceb> general fluid dynamics instrumentation
[16:40] <Laurenceb> ^ that APD would do
[16:42] <Laurenceb> near IR will also penetrate skin
[16:43] <SpeedEvil> hm
[16:43] <SpeedEvil> m
[16:43] <SpeedEvil> not much though
[16:43] <SpeedEvil> It would probably be adequate for surface bloodflow though
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[16:46] <laurence_> http://www.moor.co.uk/
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[17:10] <er1k757> hey all; I asked a bunch of questions in here before, and got some great responses - we successfully launched our balloon, just wanted to share:
[17:10] <er1k757> http://candescence.org/2010/08/hackerspaces-in-space/
[17:10] <SpeedEvil> neat
[17:10] <er1k757> thanks again for the help, #highaltitude
[17:12] <SpeedEvil> Congrats.
[17:12] <SpeedEvil> Looks like it went well.
[17:12] <er1k757> thanks. we were pleasantly surprised for our first time; the camera got bumped a bit during launch and wasn't fastened as well as it could have been, so we got a bit of the container in each shot
[17:13] <er1k757> but the telemetry worked surprisingly well all the way up to 103k feet with our home-made antenna, so we considered it a success
[17:13] <jonsowman> ah that's alright - proves it was you that took them :)
[17:13] <er1k757> hehe
[17:13] <jonsowman> anyway well done :D
[17:14] <er1k757> thanks!
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[18:18] <Upu> http://ava.upuaut.net/wp-content/uploads/2010/09/IMG_4820.jpg worked first time :)
[18:18] <Upu> note the on/off paper clip
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[18:46] <jcoxon> evening
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[19:20] <Quai> has anyone seen something like this? http://pastebin.com/C74SE65w
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[19:38] <Laurenceb> hi
[19:39] Action: Laurenceb is finally ready to submit files to seeedstudio
[19:39] <jcoxon> hey Laurenceb
[19:39] <Laurenceb> hi jcoxon - got your email on transatlantic
[19:40] <jcoxon> yeah, no responses yet :-p
[19:40] <Laurenceb> heh id prob be able to help
[19:40] <Laurenceb> guess what would be useful is getting together an organised page
[19:41] <Laurenceb> we got it pretty well planned out before
[19:41] <jcoxon> my plan was for people to reply saying they wanted to help out
[19:41] <Laurenceb> but TBH i cant remember half of what we were thinking of
[19:41] <Laurenceb> oops sorry
[19:41] <Laurenceb> yes im ready to help out :P
[19:42] <jcoxon> hehe
[19:42] <jcoxon> then once we'd got a team we'd push on with the various components
[19:43] <Laurenceb> yeah
[19:43] <jcoxon> cause we really are nearly there
[19:44] <jcoxon> i've got a near working ballast system
[19:44] <jcoxon> steve's radio just needs a test flight
[19:44] <Laurenceb> Randomskk: http://i.imgur.com/RS2be.png and http://i.imgur.com/sbbaJ.png <- ready to submit to seeedstudio - finally
[19:44] <Laurenceb> yeah, that looked very promising
[19:45] <jcoxon> just need to pull it all together
[19:45] <jcoxon> Laurenceb, if you briefly reply perhaps others will :-p
[19:46] <Laurenceb> ok ok
[19:46] <jcoxon> thanks :-)
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[21:30] <jcoxon> okay i might have done the coolest thing ever - and its so incredibly simple
[21:30] <jonsowman> ...?
[21:30] <jcoxon> i've got a clickable waterfall image on my dl-fldigi remote station
[21:30] <jcoxon> which will change the freq to where you click
[21:32] <jcoxon> without javascript etc
[21:32] <jonsowman> nice
[21:32] <jonsowman> how?
[21:32] <jcoxon> found out that a image submit button returns the mouse position as well
[21:32] <jcoxon> (in php)
[21:32] <jonsowman> ah nice
[21:32] <jonsowman> didn't know that
[21:32] <jcoxon> so made the waterfall a submit button and then grab the x coord
[21:32] <jonsowman> :)
[21:32] <jcoxon> then * 4 and submit it to dl-fldigi
[21:33] <SpeedEvil> neat
[21:33] <jcoxon> i've tried a lot of options e.g. with javascript
[21:34] <jcoxon> but then i read this - its perfect for the situation
[21:36] <jcoxon> night all
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[21:48] <Randomskk> eugh my internet
[21:49] <Randomskk> Laurenceb: that looks really good
[21:49] <Randomskk> can't wait to see how the PCBs turn out
[22:03] <Laurenceb> yeah
[22:04] <Randomskk> your component density makes me jealous, all mine keep looking like empty space
[22:04] <Laurenceb> i just spotted C36 has a via in its pad doh
[22:04] <Randomskk> especially with it being double sided
[22:04] <Laurenceb> there goes that plan
[22:04] <Randomskk> on the flip side I don't envy manufacture
[22:04] <Randomskk> via in the pad isn't a massive deal, unless you had plans for it
[22:04] <Laurenceb> yeah, needs solder screen
[22:05] <Laurenceb> it seems to be a matter of opinion if vias in pads is wise
[22:05] <Randomskk> usually I try to avoid it, same way I try to avoid having a via directly inline with a trace
[22:05] <Randomskk> (for instance ---o---- )
[22:06] <Randomskk> I'd rather have it stick out or go beyond an edge or something. especially when manufacturing at home, less of an issue when getting made properly I guess
[22:06] <Randomskk> all this design for manufacture crap
[22:06] <Laurenceb> guess id better shift the pad - i was also considering mucking about with the gnd plane around the servo connectors - as at the moment the current return path is a bit close to the gps
[22:06] <Laurenceb> and you know what the ublox5 is like with power supply noise
[22:06] <Randomskk> but I've occasionally had to put vias in pads and it's not been harmful
[22:06] <Laurenceb> yeah - i found a helpful pdf, just a sec
[22:06] <Randomskk> yes, that is a big downside to putting loads of stuff on both sides
[22:06] <Randomskk> makes it a lot harder to have a really nice ground plane
[22:07] <Laurenceb> http://www.screamingcircuits.com/Portals/0/documents/Via_In_Pad_Guidelines.pdf
[22:07] <Randomskk> nevertheless your ground plane seems pretty decent
[22:07] <Randomskk> I see what you mean about the gps though
[22:07] <Randomskk> no thermals?
[22:07] <Laurenceb> the QFN on page 3 is a very interesting way to do it
[22:08] <Laurenceb> no, why would i need them?
[22:09] <Laurenceb> - ill prob use hot air gun
[22:10] <Laurenceb> also - ive soldered pin headers and stuff this size with no thermals before without issue - just with a low power iron
[22:10] <Randomskk> on through hole parts?
[22:10] <Randomskk> yea, fair enough then
[22:11] <Laurenceb> the most troublesome imo is sma connectors
[22:11] <Randomskk> I wish eagle let me put them on some things and not on others
[22:11] <Laurenceb> and you cant use thermals for them
[22:11] <Laurenceb> real issue to solder them
[22:11] <Randomskk> soldering the ground connection on a to220 with a really massive ground plane on the pcb isn't much fun
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[22:11] <Randomskk> the cusf iron makes it easy though, it is deceptive
[22:12] <Laurenceb> yeah there is a big mosfet on the board
[22:12] <Laurenceb> but it should have fairly low thermal mass - its quite thin
[22:12] <Randomskk> fair enough, isn't it smd?
[22:13] <Darkside> that is a very cool looking board Laurenceb
[22:13] <Randomskk> generally smd parts you hot air or reflow and it's not really an issue
[22:13] <Darkside> how long did it take you to route?
[22:13] <Laurenceb> 6 months :P
[22:14] <Darkside> heh
[22:14] <Laurenceb> brb
[22:24] <Laurenceb> hmm yeah i can cut off the gnd plane by the servo headers and connect in down to the smps ground plane
[22:24] <Laurenceb> then the gnd flood around the gps is basically just for sheilding - much nicer
[22:26] <Laurenceb> the routing that never ends :D
[22:27] <Randomskk> :D
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[22:27] <Randomskk> until you give up and submit it anyway
[22:27] <Randomskk> then it's all down to r2 P
[22:27] <Randomskk> :P even
[22:27] <Laurenceb> heh
[22:27] <natrium42> hi
[22:27] <natrium42> sup homies?
[22:27] <Laurenceb> bro
[22:27] <Randomskk> I'm amazed the weather station PCB's ethernet worked - the phy, magjack and about 20 MII nets, but it actually negotiates and sends data
[22:27] <Randomskk> hi natrium42
[22:27] <Laurenceb> oh nice
[22:27] <Laurenceb> well done
[22:28] <Randomskk> by sends data I mean responds to pings, but that's essentially the same
[22:28] <Laurenceb> well next ill make a usb comms stick... in kicad
[22:28] <Randomskk> ARP and ping is working, the rest is a minor detail
[22:28] <Randomskk> :p
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[22:28] <Randomskk> yea I plan to use kicad next to really test it out
[22:29] <Laurenceb> you need to make it solar powered... tho now youd get ethernet in the feild i dont know
[22:29] <Laurenceb> *how
[22:29] <Randomskk> solar and GSM
[22:29] <Randomskk> company I worked for did m2m provision for gsm and now I have a much more realistic idea of how that'd be done
[22:29] <Laurenceb> thatd be quite neat
[22:29] <Randomskk> it is actually quite feasible
[22:29] <Laurenceb> seismometer board would be useful
[22:30] <Laurenceb> you could have a network of them and triangulate events
[22:30] <Randomskk> bout a pound a month line rental, pound a gig data or something, sim card that will connect to any network based on coverage
[22:30] <Randomskk> low power gsm unit that you turn on hourly based on solar power and a decent sized battery
[22:30] <Randomskk> they got a two-hourly temperature monitor running for a year on a set of three AAs
[22:31] <Randomskk> msp430 mcu though and a very power efficient design
[22:31] <Randomskk> nevertheless, definitely achievable
[22:31] <Randomskk> atm we have ethernet and mains power so it's not an issue but making one that can be deployed anywhere would be awesome
[22:31] <Randomskk> putting a seismo on it would also be very cool
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[00:00] --- Wed Sep 8 2010