highaltitude.log.20190815

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[00:33] <SpacenearUS> New vehicle on the map: 03VK3JUG_chase - 12https://tracker.habhub.org/#!qm=All&q=VK3JUG_chase
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[05:06] <SpacenearUS> New vehicle on the map: 03KG7IXX-15 - 12https://tracker.habhub.org/#!qm=All&q=KG7IXX-15
[05:33] <SpacenearUS> New position from 03ICT3 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=ICT3
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[08:20] <nmcc> PE2BZ, Ben, for my solar powered web server project I'm using a Chinese MT3608 step-up set to 5.2V - the only issue is ensuring the battery can deliver sufficient current for the micro-bursts the Pi seems to need that I haven't tracked down yet - even a honking great capacitor (1F) doesn't seem to help but I've now got a uCurrent & a logger setup so I can explore further.
[08:25] <nmcc> I'd use an Arduino Pro Mini with reg & LED's removed with power via a MCP1703 converter to act as a power manager & provide analog services, communicating with the Zero over I2C as well as some direct MOSFET on/off. That's about 3g more but should provide a considerable degree of intelligence to the power handling.
[08:27] <nmcc> What are you hoping the Pi will do in sunlight - send SSDV?
[08:32] <nmcc> Oh, an MCP73871 manages the battery & solar cell so it automagically feeds from where ever there is power.
[09:19] <SpacenearUS> New vehicle on the map: 03SPACECAMP - 12https://tracker.habhub.org/#!qm=All&q=SPACECAMP
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[09:51] <SpacenearUS> New vehicle on the map: 03hi-impact - 12https://tracker.habhub.org/#!qm=All&q=hi-impact
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[11:22] <Ron_G8FJG> wonder how big the crater will be? :-)
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[12:06] <PE2BZ> nmcc, SSDV, at low altitude ( < 3000 m, aiming at floating) so the payload might not return, and / or aprs on solar, no images or so, but both require the Pi to shutdown nicely to be able to restart in sunlight.
[12:22] <nmcc> My Pi0W on my desk needs about 140mA to start and mostly sits at 70mA with the occasional blip to ~140mA - it's part of the plan to figure this out so I'll have more details over the coming weeks.
[12:24] <nmcc> The Pi, with an analog chip for input can shutdown on light levels or battery, but needs something to decide that its OK to wake up - you don't want to wake when the battery hasn't got much juice and then it finds a cloudy area. Or are you hoping to eliminate a battery - I have a 150mAh LiPo on my desk weighing in at 5.5g
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[12:26] <nmcc> What do you get out of the polycrystalline ultra-fragile solar cells, 0.5V @ what mA??
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[12:29] <PE2BZ> The 52 * 52 mm 580 mA in full sun and the 26 * 52 mm about half of it ;-)
[12:44] <SpacenearUS> New vehicle on the map: 03PA5ROB_chase - 12https://tracker.habhub.org/#!qm=All&q=PA5ROB_chase
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[12:55] <SpacenearUS> New position from 03KD0HIP-7 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=KD0HIP-7
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[13:35] <SpacenearUS> New vehicle on the map: 03S52O-9_chase - 12https://tracker.habhub.org/#!qm=All&q=S52O-9_chase
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[13:43] <OZ1SKY_Brian> PE2BZ Hi. checked the sondes with a specan, and even though the leds tell its transmitting cw, no signal is comming from the rs41 after power cycle
[13:44] <OZ1SKY_Brian> must be a bug in the software
[13:50] <OZ1SKY_Brian> it can do ism 868mhz too :-)
[13:52] <OZ1SKY_Brian> wait, looks like a harmonic
[13:54] <OZ1SKY_Brian> pmr446 is not a harmonic, that works
[13:54] <OZ1SKY_Brian> save
[13:54] <SpacenearUS> New position from 03KB0MC-8 after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KB0MC-8
[13:58] <OZ1SKY_Brian> i think i found the bug, if RTTY=OFF the tx does not start after power cycle
[13:58] <OZ1SKY_Brian> even though cw is on
[13:59] <michal_f> I ordered a PCB from a 'guy' in internet... https://ibb.co/p2mPqzr https://ibb.co/M7pmk4M
[13:59] <michal_f> how do you find "quality" :/
[13:59] Ollie_E (c223e910@194.35.233.16) left irc: Remote host closed the connection
[13:59] <michal_f> and it costs me 15$ !
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[14:41] <nmcc> That's not a PCB, it's a small art installation
[14:45] <chris_99> haha
[14:45] <chris_99> i'm curious if those are plated holes
[14:46] <SpacenearUS> New vehicle on the map: 03KB0MC-14 - 12https://tracker.habhub.org/#!qm=All&q=KB0MC-14
[14:48] <fsphil> I'm not great at home etching PCBs, but I'd say mine turned out better than that
[14:48] <chris_99> heh
[14:49] <chris_99> i don't understand the solder on the traces?
[14:49] <fsphil> there might have been gaps in the traces
[14:49] <chris_99> ahh
[14:49] <fsphil> maybe left it in the acid a bit too long
[14:50] <SpacenearUS> New vehicle on the map: 03mg169706_chase - 12https://tracker.habhub.org/#!qm=All&q=mg169706_chase
[14:57] <nmcc> What was the delivery time?
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[14:57] <chris_99> what's it for also , out of interest?
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[15:07] <Ollie_E> Hi all, I am very new to High Altitude Ballooning, and am currently trying to test a tracker that I have constructed. Dl-fldigi successfully decodes the strings, but doesn't upload them, instead an error message appears, informing me that it "Couldn't resolve host name". Does anyone have any suggestions on how I could fix this?
[15:10] <Ollie_E> Oops, no worries, I have fixed the issue
[15:11] <SpacenearUS> New vehicle on the map: 03RANGER1 - 12https://tracker.habhub.org/#!qm=All&q=RANGER1
[15:13] <nmcc> Welcome, are you RANGER1?
[15:18] <nmcc> Ollie_E, if that is you, you need to tweak your string formatting - there is a parse error when you have a space instead of a 0 for single digit elements of the time
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[15:26] <Ollie_E> Yes, you are right, I noticed that too, I am just editing my code so that the spaces are replaced with zeros
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[16:16] <michal_f> chris_99 this was supposed to be a hat for pi0
[16:16] <michal_f> for mtx2
[16:17] <michal_f> linear regulator and othjers
[16:31] <nmcc> michal_f, how long did it take them to make that?
[16:32] <nmcc> fsphil, more like on the acid too long
[16:33] <SA6BSS-Mike> OZ1SKY_Brian: the si4032 can do 240930 MHz
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[16:36] <SA6BSS-Mike> is people realy eaching their own things anymore, way to cheap to make them in a pcb cad program and order them from a pcb fab
[16:38] <SpacenearUS> New vehicle on the map: 03KD0AWK-12 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-12
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[17:05] <fsphil> might be still worthwhile for large boards
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[17:11] <SpacenearUS> New vehicle on the map: 03PE2BZ-4FSK - 12https://tracker.habhub.org/#!qm=All&q=PE2BZ-4FSK
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[17:54] <SpacenearUS> New vehicle on the map: 03KJ4ZVJ-11 - 12https://tracker.habhub.org/#!qm=All&q=KJ4ZVJ-11
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[18:26] <SpacenearUS> New vehicle on the map: 03KD0AWK-14 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-14
[18:36] <michal_f> after bouncing mails for a week he did this in two days
[18:37] <michal_f> but I should have send it to some pro maker
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[19:17] <SpacenearUS> New vehicle on the map: 03KD0AWK-3 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-3
[19:17] <SpacenearUS> New vehicle on the map: 03KD0AWK-4 - 12https://tracker.habhub.org/#!qm=All&q=KD0AWK-4
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[19:39] <SpacenearUS> New vehicle on the map: 03M0LVR_chase - 12https://tracker.habhub.org/#!qm=All&q=M0LVR_chase
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[20:03] <Astrobiologist> on my hols... leaving finhab broadcasting and then hiking around a bit shows very good ground level range (and this is without even a ground plane)
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[20:12] <SpacenearUS> New position from 03finhab after 033 days silence - 12https://tracker.habhub.org/#!qm=All&q=finhab
[20:14] <Astrobiologist> F1UHT could possibly receive finhab as a ground test
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[20:39] <Astrobiologist> the GPS antenna on the PITS is quite capable of getting a lock from INSIDE a building!
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[20:43] <nmcc> SA6BSS-Mike, I used to think so, but for literally doing one off's for prototyping, I'm looking at using paper based boards & my laser cutter
[20:43] Nick change: adamgreig -> Randomskk
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[20:49] Nick change: Randomskk -> adamgreig
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[21:17] <SpacenearUS> New position from 03KG7IXX-15 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KG7IXX-15
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[23:12] <SpacenearUS> New position from 03KD0HIP-7 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KD0HIP-7
[00:00] --- Fri Aug 16 2019