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2018-06-17, 10:53
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System Blue Order Status ...
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2018-06-16, 09:52
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Strikes not showing after...
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2018-06-16, 09:31
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High field RJ45
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2018-06-14, 13:07
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2018-06-14, 07:44
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Accuracy question
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Lonesome Stations
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2018-06-08, 13:02
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Quiet quiet day in NA
Forum: Hardware, Software, Lightning Physics
Last Post: Nekota
2018-06-06, 02:16
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  Historical Data
Posted by: acidohm - 2017-12-31, 18:35 - Forum: General Discussion - No Replies

Happy New Year all!!

Is it possible to select more then 2 days worth of data in the historical data?? A month at a time would be nice??

Regards

Mark

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  GPS troubles with my blue box
Posted by: hazet_CHAM - 2017-12-28, 15:53 - Forum: Hardware, Software, Lightning Physics - Replies (3)

Hello
since a few hours my blue sys can't find any satellites. The blue GPS indicator on the frontside illuminates for approx. 1 sec, the pauses for approx. 2 sec. 
No PPS pulse. Antenna device is MEDIATEK. Any hints what is going wrong here? Had the same troubles already some weeks ago but they disappeared suddenly.
Cheers
Hans

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  Chaos Computer Club Congress meetup (34C3)
Posted by: namaste - 2017-12-26, 21:30 - Forum: General Discussion - No Replies

Hey there,

Reasonably new participant to the blitzortung project here. 
I've got two stations. one that I will be bringing to Nepal if all goes well; the other will stay hosted in Amsterdam.

From tomorrow till the beginning of the 31st of Dec, i'll be at 34C3, the yearly conference of the CCC germany that'll be in Leipzig this year.

If there's anyone that'd want to meet up there; come look for 'Justa' somewhere around the HSNL/Techinc assemblies.
I'm also bringing a fridge with home-brewed beer; so that might also be an extra incentive to come meet up.

You can also , of course, drop a private message here; i'll try to look from time to time.

Perhaps see some (other) participants or tech-heads of the project, there.

-- 
 Justa

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  Several questions about the circuit protection that using linear power supplies
Posted by: Jand - 2017-12-22, 04:00 - Forum: Hardware, Software, Lightning Physics - Replies (3)

This is a two-part question:

  •  Why do so many projects that I see are using basic linear transformer power supplies (i.e., mains->transformer->rectifier->regulator) but not have any kind of input protection beyond a fuse? Is a fuse really going to help prevent damage to the circuit? Are they assuming that it's going to be plugged into a surge protector, so it doesn't need to worry about excessive input voltage?
  •  If it is a good idea to include more protection in a simple power supply, is a simple crowbar-type arrangement like this appropriate?
   

My thought process was that I just want the fuse to open and the whole thing to become inactive if anything goes out of spec, so during an overvoltage, I basically just want to short-circuit and blow the fuse. The rule of thumb that I have heard is that your device should be able to tolerate during normal operation anywhere between 100-140 volts from a 115v nominal mains supply. This means a peak AC voltage of ~198, hence the 200v TVS diodes. The clamping voltage of common 200v TVS diodes(http://www.kynix.com/Product/Cate/109.html) seems to be in the 320-330v range, so a 300v gas discharge tube was chosen to take up the larger surges a little bit before the diodes reach their limit. Anything more than the GDT can handle would probably just arc across the component leads and trip the mains circuit breaker or blow the power supply's fuse instantaneously, right?

Is this enough? Should I also fuse the mains neutral and use a lower voltage TVS diode for D2 in order to open the circuit in the case of reversed hot and neutral? It seems like it might be over doing it to try to protect against grossly incorrect mains wiring like that. Also, now I'm starting to ask myself if it isn't even more dangerous to risk opening the neutral side of the circuit before the hot side fuse blows...

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  Password reset on Blitzortung
Posted by: Toxic - 2017-12-20, 22:42 - Forum: General Discussion - Replies (1)

Hi I need to reset my password on Blitzortung.org but cannot find how to reset/request a new password.

http://en.blitzortung.org/login.php

and gives no clue as to how to reset the password.

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  Electric vs Magnetic antenna
Posted by: GilbertKE - 2017-12-18, 08:22 - Forum: Hardware, Software, Lightning Physics - Replies (7)

Hello, 

Does any one know the range (km) that Electric signal can detect? My guess is that Magnetic antenna (H) detects strikes in longer distances than Electric antenna. I see more detections (signals and  effectivity L) with ferrite antennal than E antenna.  

I am also thinking of adding a filter to Magnetic channel. Of the 3 H field channels, which would work best?

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  Effectivity S & M?
Posted by: GilbertKE - 2017-12-18, 08:06 - Forum: Website, Maps and Applications - Replies (3)

Hello, 
What do Effectivity S and Effectivity M represent?

I know effective L represent the number of received signals used to calculate strike position with distance of up to 5000km.

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Photo Africa Region?
Posted by: GilbertKE - 2017-12-17, 02:56 - Forum: Website, Maps and Applications - Replies (2)

Hello, 
I am in Kenya. Do we have a way of updating my region here to Africa? 

[img]file:///Users/gilbert/Desktop/Region.png[/img]



Attached Files Thumbnail(s)
   
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  deleting alerts
Posted by: fmuscat - 2017-12-13, 15:47 - Forum: Website, Maps and Applications - Replies (2)

Hi,
I created a stroke alert and cannot delete it,  it will appear again after I delete the alert.
any help please?  Dodgy

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  build log [Blue PCB 20.5]
Posted by: yair - 2017-12-09, 11:54 - Forum: Hardware, Software, Lightning Physics - Replies (7)

hello, just got my station.

==ordering==
1 x main board
2 x ferrite antennas.
+ shipping
+ paypal

total 235.84 €

==box==
content [pic]

* PCB 20.5 
** pic
** schematics[1]
** board[1]
* two ferrite antennas
* thru hole components

content arrived with no issues in carton box (10x24x17cm) with some newspaper as filling. 
pcb was inside a zip bag, the pcb sharp corners tore through the plastic bag and were exposed.

the kit didn't come with the 3mm LEDs, luckily i ordered a LED kit a while ago.
there are built in smd leds, which i failed to notice. the holes are to connect to an external led.

==soldering==
i started soldering with my chinese soldering station but i felt it didn't have enough power for handling the F/SMA connectors. 
even the ethernet grounds gave it a fight. so switched to the metcal SP-200 with a fat head. it handled the rest well. with a bit of flux for some. 

i sent my "finished" board picture to @tonuonu (who nudged me into blitzortung) and i noticed i switched the ethernet and mcu crystals. 

[Image: fhRiom7.png]

so i had to do a little rework. 

first blink!

==power==

Quote:"The main board is supplied with a 5V USB power adapter. The plug must be a USB-B Mini 5 pin. The power supply is not part of the kit. It must be purchased separately. The power consumption is about 450mA. Please use a 1A or bigger power supply. We have made bad experiences with 500mA power supplies."


first test with a power bank and a "usb doctor"
[Image: jqJeyBg.png]

==GPS==

Quote:You can use any GPS antenna operating with 3.5 Volts. The Antenna is connected via an SMA connector with the main board. The built in GPS module is very sensitive and works with antennas connected by lines of up to 10 meters.

==first boot==
on first boot and after connecting GPS and ethernet i got DHCP address and encountered the "PCB Unknown" error.

[Image: 07r1iff.png]

updated firmware to blue 8.3 from the firmware page. dont forget to actually click the "start update"...

[Image: QUmVpuH.png]
==antenna==
i got 2 ferrite antennas in my order. 


 
Quote:4.1.2 Ferrite rod antennas

It is not necessary to align the two antennas to north/south and west/east. The antennas only have to be placed horizontally
[...] strip the insulation of the copper enameled wires, before the blank copper wires can be soldered to the amplifier board.
[...] one of the two copper enameled wire ends has a knot. Connect these wires with the positive inputs of your amplifier and the other wire with the negative input of the amplifier

instead of soldering the Ferrite wire to the amp board (PCB16) i burnt the ends and crimped it. 

[Image: CQHzAwd.png]


[Image: KJF38Ju.jpg]

[Image: 4W6pbSS.png]
==result==
station 2075 is on. 


[Image: IM7wfGA.png]


image gallery -> https://photos.app.goo.gl/iiSJuowBvufX85HH2

[1] both missing from http://www.blitzortung.org/Compendium/Hardware/, latest capture PCB_20_3 but it is different

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