highaltitude.log.20080906

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[00:14] <fuzzylugnuts> hey fergus
[00:14] <fnoble_lab> hi
[00:14] <fuzzylugnuts> did I show you these? http://68.34.212.42/happy_batt.jpg
[00:15] <fnoble_lab> nope
[00:15] <fnoble_lab> art they your Li-Th-Cl thingys?
[00:15] <fuzzylugnuts> yep
[00:16] <fnoble_lab> ooh sweet
[00:16] <fnoble_lab> that is a rediculous capacity
[00:16] <fuzzylugnuts> the little cr123s take care of the high current pulses, and are charged off the big one
[00:16] <fnoble_lab> i see
[00:16] <fnoble_lab> the little ones are Li-Ion?
[00:17] <fuzzylugnuts> LiFePO4
[00:17] <fnoble_lab> hmm, what about using a super cap? maybe thats too low current too
[00:17] <fuzzylugnuts> the voltage drops too much on them
[00:17] <fnoble_lab> not heard of LiFePO4, what are they like?
[00:18] <fnoble_lab> oh ok
[00:18] <fuzzylugnuts> superb. They don't explode or catch fire, even if you mangle them. They usually have really high discharge rates
[00:18] <fuzzylugnuts> the A123's I have can be drained fully at 90A
[00:19] <fnoble_lab> ah is that the same chemistry as the A123s?
[00:19] <fuzzylugnuts> Yep
[00:19] <fnoble_lab> ive heard they are good
[00:19] <fnoble_lab> ok
[00:19] <fuzzylugnuts> I use them for loads of stuff.
[00:21] <fnoble_lab> im just ordering your MCA now
[00:21] <fuzzylugnuts> haha! Thanks
[00:22] <fuzzylugnuts> I was just saying how I wish I had one. It would make calculating duty cycle really easy
[00:22] <fnoble_lab> how can they be used to calculate duty cycle?
[00:23] <ShellEvil> LiFePO4 != A123
[00:23] <fnoble_lab> ok, bought it
[00:23] <ShellEvil> there are ones available with various charge and discharge efficiency.
[00:24] <ShellEvil> Most tend to have rather high discharge capacities, though that varies.
[00:24] <ShellEvil> What varies lots is charge rate - A123 cells can be charged fast due to them using baby seals in the manufacture, or something.
[00:24] <fuzzylugnuts> fnoble_lab: ÿlike, for Hell, you'd have they keying signal on the input of the MCA, so you;d be using it like a counter
[00:25] <fuzzylugnuts> fnoble_lab: area under the curve would give you the on time.
[00:25] <fnoble_lab> ah i see, i think
[00:27] <fuzzylugnuts> fnoble_lab: and if you have a signal with a varying transmission length, you can hook up a time-to-voltage converter
[00:29] <fnoble_lab> ok
[00:30] <fuzzylugnuts> fnoble_lab: I'll send some optical grease with the pmt too.
[00:31] <fnoble_lab> oh sweet
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[01:08] <jcoxon> fnoble_lab, ping
[01:21] <fuzzylugnuts> I'm out of gin : (
[01:23] <fnoble_lab> jcoxon: hi
[01:27] <jcoxon> fnoble_lab, hey
[01:27] <jcoxon> trying to install rtty on ubuntu
[01:27] <jcoxon> can't find the forms.h
[01:27] <jcoxon> any ideas?
[01:27] <fnoble_lab> ah yes
[01:28] <fnoble_lab> you need something for that
[01:28] <fnoble_lab> now what was it... :)
[01:29] <jcoxon> indeed
[01:29] <fnoble_lab> i think its called xforms
[01:29] <fnoble_lab> dunno if its in the repos or if i downloaded it
[01:30] <jcoxon> xforms is very elusive
[01:30] <fnoble_lab> http://savannah.nongnu.org/projects/xforms/
[01:30] <fnoble_lab> this is the project page
[01:30] <fnoble_lab> i think i might have installed it from src
[01:31] <fnoble_lab> dunno
[01:31] <jcoxon> okay
[01:31] <jcoxon> i'll have a go
[01:54] <fuzzylugnuts> Hey fellas... do gps's mind being turned off and on, like to grab a position, transmit it, and then shut off again for like, 30m before it is turned on again for the next transmission?
[01:54] <fuzzylugnuts> like, if it had a sleep mode or somehting?
[01:55] <SpeedEvil> yes, they mind.
[01:55] <SpeedEvil> Sort-of
[01:56] <SpeedEvil> in that tehy will typically require lock time
[01:56] <SpeedEvil> they have various sleep modes - typically.
[01:56] <SpeedEvil> 'off' - powered down - and require a minute or 3 to give a position
[01:56] <SpeedEvil> (if they have onboard storage for sat-info, else 12 min)
[01:57] <SpeedEvil> And then there are various sleep modes that are dependant on your GPS, that go from (say) 1/4 power, but you can get a lock in 5s.
[01:57] <fuzzylugnuts> ok
[01:57] <SpeedEvil> You've really gotta read the datasheet :)
[01:58] <fuzzylugnuts> :O
[01:58] <fuzzylugnuts> no way!
[01:58] <SpeedEvil> But 100Wh will give you GPS for damn near ever on one of the more frugal GPSs.
[01:58] <fuzzylugnuts> I never thought of that!
[01:59] <SpeedEvil> 2/3 battery/month or so - if you don't turn it off.
[02:00] <SpeedEvil> If you're getting a reading every 5 min - years with some of the more frugal sorts.
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[03:48] <ShellEvil> Hmm. 10um pe is available - I can't find a source for it in other than teeny bags.
[03:53] <ShellEvil> Hmm. 5.8p/m^2 15 micron PVC (though only 1.2m wide) http://www.transpack.co.uk/list-products.asp?subcat=67
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[07:20] <edmoore> morning all homies
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[07:47] <natrium42> sup bro
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[08:13] <robert1971> edmoore: ping
[08:13] <robert1971> He must be in bed!
[08:13] <edmoore> morning sir
[08:13] <edmoore> i am actually
[08:14] <robert1971> Blimy, and you don't have kids
[08:14] <robert1971> I have made circuit
[08:14] <edmoore> not yet
[08:14] <robert1971> :)
[08:14] <edmoore> man make circuit
[08:14] <edmoore> have you been able to test?
[08:15] <robert1971> Works fine, I had to passify the wife last night so had evening off but a quick bit of soldering has produced the required circuit for trasmission. Powered up and radio loses static backgound which I think is a good sign
[08:16] <robert1971> However how to I send some noise tone
[08:16] <robert1971> Opps
[08:16] <robert1971> on the tx other than by holding it between my fingers
[08:16] <natrium42> are you using a radiometrix module?
[08:16] <edmoore> that is a good sign
[08:18] <edmoore> so you want to stick some voltage into TXD
[08:18] <edmoore> with EN high
[08:19] <edmoore> and switch your rx to SSB - single side band
[08:19] <robert1971> i shoved the 3v vcc in there makes a click
[08:19] <robert1971> ah lets try the ssb
[08:21] <robert1971> LSB or USB
[08:23] <robert1971> LSB seems pretty good to me
[08:23] <robert1971> Silence at 3v and steady tone at 0v
[08:24] <edmoore> doesn't really matter, just depends on where you put your centre freq
[08:24] <edmoore> that sounds vaguely promising - try reducing the voltage you put in it
[08:24] <edmoore> to, say, 1.5V
[08:25] <robert1971> So now I'm guessing. I connect the avr ground to the gound on the radiometrix and put the adc on the tx and vary voltage?
[08:26] <edmoore> DAC*
[08:26] <edmoore> good guess
[08:28] <edmoore> i really don't think the avr32 has a dac actually
[08:28] <edmoore> the board might, but the avr itself doesn't, as far as I know
[08:28] <robert1971> is there a difference between dac and adc?
[08:28] <robert1971> no
[08:28] <robert1971> your right
[08:28] <robert1971> just adc
[08:29] <robert1971> I thought that worked both ways
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[08:30] <edmoore> if only!
[08:30] <robert1971> Phew turned that noise off
[08:31] <edmoore> no sadly adc is an input thing and a dac is an output thing
[08:31] <edmoore> both are about interfacing our fake digital world to the real analogue world
[08:31] <edmoore> still, it's absolutely not a problem
[08:31] <edmoore> you can use resistors
[08:31] <edmoore> out of interest, how many pins do you have left?
[08:32] <robert1971> So I need to be able to send a vairable voltage using a pin on the avr. Now I need to restrict to 3v so I use a resistor and I guess I want to produce 2 tones one for 0 and one for 1
[08:32] <robert1971> Loads
[08:32] <robert1971> 10
[08:32] <robert1971> more
[08:32] <edmoore> do you have an 8-pin port free?
[08:32] <edmoore> or are they split up all over the place
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[08:33] <robert1971> I can make port a free
[08:33] <edmoore> ok. you can make a DAC
[08:33] <robert1971> I don't think that the PWM or UART affect the pins in this port
[08:34] <edmoore> if you have 8 pins free, you can make an 8pin DAC
[08:34] <edmoore> 8-bit*
[08:34] <robert1971> Ah by setting the digital bits high low and sending it to a dac chip?
[08:35] <robert1971> A dac chip with voltage output of 0 to 3 volts I guess
[08:35] <edmoore> well, you can output direct into resistors by using an 'r-2r' resistor ladder
[08:36] <edmoore> and that basically turns the value you write to the output port into a voltage, because each resisotor in the ladder is twice the value of the previous one, and in binary each significant bit is twice the value of the previous one
[08:36] <edmoore> http://en.wikipedia.org/wiki/Resistor_Ladder
[08:37] <edmoore> see if you can grok that
[08:40] <robert1971> Is there a simple way ie using the out of one pin and using it to drive a transistor to send 2 different voltages to the tx
[08:40] <robert1971> Or a switch?
[08:41] <robert1971> Clutching at straws here
[08:41] <edmoore> getting there!
[08:41] <edmoore> so potential dividers will be your friend in this case
[08:41] <edmoore> http://www.electronics2000.co.uk/data/itemsmr/potdiv.php
[08:45] <robert1971> I have made a couple of those and like magic the voltage in the middle is indeed 1/2 when r1 = r2
[08:47] <robert1971> I can't see how that would work if I can only turn a pin on or off.
[08:52] <edmoore> regrettably need to dash home, sorry. My time in ox has finished - #electronics will probably be able to help out
[08:52] <robert1971> Le me think for a bit on this. I could use Vcc (5v) + R1 to set v1 to say 2v and then use a pin + R2 with a short circuit to TX to give 2.5v. Then when pin is low no voltage therefore 2v goes to tx when pin is high this send 2.5v which is higher than 2v and wins the race and tx goes to 2.5v signal? Or does that knacker the pin if I'm potentially sending 2v at it from the otherside so to speak.
[08:53] <robert1971> Ok ttfn
[08:53] <robert1971> Thanks for your patience and time
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[09:30] <ShellEvil> I could answer your question if I was awake. Alas, it's making no sense, so I'm going back to bed.
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[09:41] <SpeedEvil> You're trying to basically do a DAC robert1971?
[09:46] <jcoxon> hey robert1971
[09:46] <jcoxon> i have a solution for you about varying the voltage
[09:46] <jcoxon> its nice and easy
[09:49] <jcoxon> i know its an arduino but:
[09:49] <jcoxon> http://principialabs.com/arduino-pulse-width-modulation/
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[09:53] <jcoxon> robert1971, basically you use a PWM with a low pass filter circuit to smooth it out, which allows you to easily vary the voltage
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[12:57] <edmoore> hi soneil
[12:57] <soneil> morning
[12:58] <soneil> I gotta move irc to a shell .. I forgot closing my lappy would disconnect
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[13:35] <fuzzylugnuts> my battery has been cycling at 1A for 15s every 20m for 12 hours now. The pulse battery has been able to recover fully between discharges
[13:36] <fuzzylugnuts> I think this is the way I'm going to do it for the transatlantic stuff.
[14:21] <fuzzylugnuts> oh noes! I have a dangling pointer ;_;
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[14:27] <fuzzylugnuts> Hiena: are you ok at C?
[14:27] <Hiena> More or less.
[14:27] <Hiena> Hava a problem?
[14:27] <Hiena> -a+e
[14:28] <fuzzylugnuts> Yeah, a silly little thing. I've declared a function as a "char" and am returning a variable that is declared in the function
[14:28] <fuzzylugnuts> so it gives me: warning: function returns address of local variable
[14:29] <Hiena> Are you devlared the return value as char or as a char type pointer?
[14:29] <fuzzylugnuts> like this: char cwpacket[256];
[14:30] <Hiena> Ugh... you want to sending back an array or a single char?
[14:31] <fuzzylugnuts> an array i guess, like, a line of text
[14:31] <fuzzylugnuts> if you want to look at it, I can post the code on my web server
[14:32] <Hiena> Ah, a string. The string is an array vith a null (\0) at the end. That case you should use pointer at the return valuse declaration of your function.
[14:33] <fuzzylugnuts> erm, what would that look like?
[14:35] <Hiena> For example char myfunction(int something, char thething){} is a function return a single character. The char *myfunction(int something, char thething){} return a char type pointer which points to the results string in your function.
[14:35] <fuzzylugnuts> ahhh... I'll try that
[14:36] <Hiena> And in the function, you could return the location of your string with a return(cwpacket);
[14:36] <fuzzylugnuts> http://68.34.212.42/scrap/code/nmea/gps_parse.c
[14:36] <fuzzylugnuts> thats the source
[14:38] <Hiena> Yup, you have to add the * at the begin of your functionname.
[14:39] <fuzzylugnuts> ok
[14:40] <fuzzylugnuts> ooh. something is still broke.
[14:40] <fuzzylugnuts> ý9ýý¥ýýCALLSIGN TIM
[14:40] <fuzzylugnuts> is my output
[14:40] <fuzzylugnuts> the other files are gps_parse.h and test.c
[14:40] <fuzzylugnuts> gcc test.c gps_parse.c -o test is the compile thingus
[14:41] <fuzzylugnuts> I appreciate this help because I've never had a class in C so all this little stuff is missed.
[14:43] <Hiena> Ugh, well, if you don't mind, i would be helping you at 21:00 GMT. I have to go back to the cement mixer.
[14:44] <fuzzylugnuts> Oh, ok, no problem
[14:44] <fuzzylugnuts> have fun
[14:44] <Hiena> Heh...
[14:44] Nick change: Hiena -> Hiena_away
[14:45] <fuzzylugnuts> one of my favorite jobs when I was doing construction work was wheeling concrete. It sloshes around in the wheelbarrow and is a bitch to control. Fun.
[14:46] <fuzzylugnuts> ÿanyone else is welcome to step in
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[14:51] <fuzzylugnuts> Hey
[15:01] <fuzzylugnuts> YAYs. I got it. I just had it return to the variable that was passed to the function.
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[15:02] <RocketBoyV1> setjump?
[15:03] <fuzzylugnuts> just having dull moments returning strings from a function.
[15:07] <RocketBoyV1> fuzzylugnuts: you have a FT817 don't you?
[15:07] <fuzzylugnuts> Yep
[15:08] <RocketBoyV1> have you ever used on the data modes - does it display the data on the LCD - or just put it to a data out connector?
[15:09] <fuzzylugnuts> yeah, I've used it for loads of data. The "data in" for digital is just an audio in
[15:09] <fuzzylugnuts> nothing is decoded in the 817
[15:09] <fuzzylugnuts> the "data out" is an audio out fixed at 100mv p-p (I think its 100mv...)
[15:10] <RocketBoyV1> ah ok :-( I just thought it would be a neat to get reciver and decccoder all in one package
[15:10] <RocketBoyV1> particularly for DFing payloads
[15:11] <fuzzylugnuts> they can only stuff so much into that iddy biddy thing
[15:12] <RocketBoyV1> yeah - kinda neat alreday
[15:12] <fuzzylugnuts> I wish they included the weather radio bands : (
[15:12] <RocketBoyV1> perhaps I sould make a small modem and display to glue on to my rig
[15:12] <fuzzylugnuts> and used latching relays for the band switching.
[15:13] <fuzzylugnuts> RocketBoyV1: for APRS?
[15:13] <RocketBoyV1> yeah could be - or rtty it doesn't matter on the format - why is there one already?
[15:14] <RocketBoyV1> I can always mod the payload
[15:14] <fuzzylugnuts> I just thought I'd ask because there are some HTs out there with built in APRS packet decoders
[15:14] <RocketBoyV1> I'd guess they would be FM?
[15:15] <fuzzylugnuts> yeah, generally.
[15:15] <fuzzylugnuts> do you send aprs on ssb?
[15:15] <fuzzylugnuts> er, I should say "afsk".
[15:16] <RocketBoyV1> I thought I had seen somthing like that - which is why I wondered if the FT817 might have it
[15:16] <fuzzylugnuts> nope.
[15:16] <RocketBoyV1> yeah we mainly use FSK on SSB
[15:16] <fuzzylugnuts> ok
[15:16] <RocketBoyV1> 300Hz shift
[15:17] <RocketBoyV1> oops 200Hz shift - 300baud
[15:17] <RocketBoyV1> like HF packet but on UHF
[15:17] <fuzzylugnuts> ah, the rtty transmitter?
[15:17] <RocketBoyV1> yep
[15:17] <fuzzylugnuts> groovy.
[15:17] <fuzzylugnuts> ÿÿthe TinyTrak 4 will eventually have PSK-31 support, if you are interested.
[15:17] <RocketBoyV1> Interesting
[15:18] <fuzzylugnuts> http://www.byonics.com/tinytrak4/
[15:18] <fuzzylugnuts> and they put out a SMT version
[15:18] <fuzzylugnuts> probably overkill for what you are doing.
[15:19] <RocketBoyV1> it will be difficult to interface to the modules we use
[15:20] <fuzzylugnuts> ok
[15:20] <RocketBoyV1> we could do PSK31 over FM audio - but the range will be limited by FM
[15:20] <fuzzylugnuts> yeah
[15:21] <fuzzylugnuts> isn't the radiometrix ssb though?
[15:21] <RocketBoyV1> I think 300Baaud HF packet/RTTY is the way to go
[15:21] <fuzzylugnuts> yeah
[15:21] <fuzzylugnuts> simple.
[15:21] <RocketBoyV1> nope - its FM - but the signals we generate are RXed on a ssb reciver
[15:22] <fuzzylugnuts> er, why? that seems like a waste of tx power
[15:23] <RocketBoyV1> nope - its actually quite efficent - what we are doing is generating signals equivelent to RTTY/HF packet - but directly rather than through a modem and a SSB TX
[15:24] Action: ShellEvil finds the ideal material for a ultra long-duration ZP balloon. http://www.mcmaster.com/ 3254K56
[15:24] <ShellEvil> fuzzylugnuts: SSB lets you recieve it and do software radio decoding on it.
[15:24] <RocketBoyV1> that way we get the advantage of the narrow band SSB filters.
[15:25] <ShellEvil> But you still can reject some of the noise that goes through that.
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[15:26] <fuzzylugnuts> RocketBoyV1: Ok, just so I'm understanding this right.. what goes into the radiometrix is the rtty tones?
[15:26] <RocketBoyV1> hey jcoxon - I finished that "SSB" version of RTTY off
[15:26] <RocketBoyV1> nope - its shaped pulses
[15:26] <RocketBoyV1> that creates an FM signal
[15:27] <RocketBoyV1> (200HZ shift FM)
[15:27] <RocketBoyV1> that sounds like tones on a SSB Rx
[15:27] <RocketBoyV1> thats what goes into a RTTY/packet decoder
[15:27] <fuzzylugnuts> interesting.
[15:28] <fuzzylugnuts> so its just to manipulate the radiometrix into doing what you want?
[15:28] <fuzzylugnuts> *just a way
[15:28] <RocketBoyV1> yeah - its kind of necessity is the mother of invention stuff
[15:29] <RocketBoyV1> we are limited to using 10mW licence exempt modules in the UK
[15:29] <fuzzylugnuts> ah, ok
[15:29] <jcoxon> hey ro
[15:29] <jcoxon> hey RocketBoyV1
[15:29] <jcoxon> thats better
[15:29] <RocketBoyV1> they tend to be NBFM
[15:30] <RocketBoyV1> which is cr*p for range as FM
[15:30] <RocketBoyV1> so its a matter of making it look like SSB + modem
[15:30] <RocketBoyV1> yo jcoxon
[15:31] <RocketBoyV1> it all works amazingly well
[15:31] <fuzzylugnuts> Cool
[15:32] <jcoxon> RocketBoyV1, so we now have packet, rtty on ssb
[15:32] <jcoxon> what changes would we need to do for the SSTV?
[15:32] <RocketBoyV1> yeah - well if it works
[15:32] <jcoxon> i'm off down to cornwall for a bit but later in the week i'll attach the radio
[15:32] <jcoxon> can i solder it directly?
[15:32] <jcoxon> as in with nothing in between
[15:33] <RocketBoyV1> you just need to take the audio ot of the gumstix directly into the radiomentrix module (no capacitor)
[15:33] <RocketBoyV1> or resistor
[15:33] <jcoxon> okay
[15:33] <jcoxon> nice and easy
[15:33] <RocketBoyV1> then play with the gain parameter on the prog
[15:33] <jcoxon> okay
[15:33] <RocketBoyV1> sor of -g nnnnn
[15:33] <RocketBoyV1> sort
[15:34] <RocketBoyV1> wher nnnn is between 1 and 32000
[15:34] <RocketBoyV1> I think somthing like 10000 will be what we need
[15:34] <jcoxon> RocketBoyV1, http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=130253020894
[15:35] Action: RocketBoyV1 is tempted - see what its like in 4 days
[15:36] <jcoxon> RocketBoyV1, i know the person who is selling it
[15:36] <RocketBoyV1> oh right -
[15:36] <jcoxon> he was trying to persuade me to buy it
[15:37] <jcoxon> oh i got some 7pin mic connectors for the ft-790r
[15:37] <jcoxon> going to make a circuit to control the radio freq from my 'puter
[15:38] <RocketBoyV1> Good - actually thats a good connector
[15:38] <RocketBoyV1> you also get audio out a
[15:38] <RocketBoyV1> and mic in
[15:38] <jcoxon> yeah
[15:38] <RocketBoyV1> as well as up/down
[15:38] <jcoxon> so was going to have an arduino control up/down
[15:38] <jcoxon> robert1971 has written a bit of php to make an interface for it
[15:39] <jcoxon> next is to automate the decoder software
[15:39] <jcoxon> and we have a fully remote system
[15:39] <RocketBoyV1> cool
[15:39] <jcoxon> just means that i can fall asleep and someone can keep it going :-p
[15:40] <RocketBoyV1> haha
[15:41] <RocketBoyV1> bbl
[15:41] Action: jcoxon is compiling qt for linpsk right now
[15:41] <ShellEvil> jcoxon: or give someone remote control :)
[15:41] <jcoxon> :-D
[16:01] <fuzzylugnuts> can microcontrollers put into a sleep mode for like, 20m and then wake up to run some code, then fall back asleep again?
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[16:01] <ShellEvil> maybe
[16:01] <ShellEvil> 'sleep mode'
[16:01] <ShellEvil> is very variable, and broadly depends on the micro
[16:01] <ShellEvil> some have seperate low power oscillators and counters that can do wakeup.
[16:02] <ShellEvil> many have 32KHz crystal connections, that can do real time clock, and wake up in exactly half an hour - forex.
[16:02] <ShellEvil> And some use little enough power that you don't care.
[16:04] <fuzzylugnuts> hmm. looks like the atmega16 only uses 1.1ma when active.
[16:08] <fuzzylugnuts> if there was like a "sleep(20 min)" function I'd be really happy.
[16:08] <fuzzylugnuts> where it would take up only uA.
[16:08] <ShellEvil> fuzzylugnuts: read the datasheet...
[16:08] <fuzzylugnuts> I am
[16:08] <ShellEvil> There will probably be some sort of 'slow' mode, where it will use less power.
[16:09] <fuzzylugnuts> but it happens to be 358 pages long, and you folks have had alot more experience with them than me, so thats why I'm asking.
[16:09] <ShellEvil> read the sections list
[16:09] <ShellEvil> look for 'low power modes' or 'suspend modes' or something
[16:10] <ShellEvil> or link me to teh datashweet
[16:10] <fuzzylugnuts> nevermind
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[17:16] <robert1971> natrium42
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[19:47] Nick change: Hiena_away -> Hiena
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[21:27] <robert1971> quick question to all you NMEA 0183 buffs. Is it common for the $GPGGA sentence to have the time XXXXXX.000 and not just XXXXXX
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[21:33] <robert1971> #gps
[21:37] <robert1971> FYI sirf gps does indeed report time with 3dp foung manual on web
[21:37] <robert1971> found*
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[21:49] <RocketBoyV1> robert1971: re your GPGGA Q - yes I have seen it on at least 2 GPS
[21:54] <ShellEvil> yes
[21:54] <ShellEvil> me too
[21:54] <ShellEvil> generally.
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[22:03] <ShellEvil> Assume that any field may have the most perverse presentation of the number you can.
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[23:17] <robert1971> RocketBoyV1: Thanks for that!
[23:30] <robert1971> RocketBoyV1: Do you know much about rtty. I have got a radiometrix card and I have managed to get it to send a signal out. Now I'm hoping to send rtty from the avr on a single pin. Do you know how this can be achived by switching 5v on and off?
[23:36] <gordonjcp> toggle the data pin at audio speeds
[23:43] <RocketBoyV1> it really depends on how you are going to receive it
[23:43] <RocketBoyV1> if you are using a data modukle or FM revceiver you cant use streight ASCII RTTY
[23:44] <RocketBoyV1> you need to DC balanced code - or use audio tones (modem)
[23:44] <RocketBoyV1> to = a
[23:46] <RocketBoyV1> anyway - I gotta go right now - chat to you anon
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[00:00] --- Sun Sep 7 2008