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Author Topic: Suggestions need on a lightning detector  (Read 1002 times)
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fredfoot2001
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« on: March 02, 2008, 11:01:42 23:01 »

Gurus,

I'm working on a homemade weather station and I would like to detect lightning.  Does anyone have a suggestion for a cheap and easy solution?  This is a learning project for me so I don't want to buy a prefabricated system.  It's a PIC based system that feeds the data to a PC.  Any thoughts?
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Wannabe
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« Reply #1 on: March 03, 2008, 12:47:56 00:47 »

http://www.techlib.com/electronics/lightning.html

Maybe?
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fredfoot2001
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« Reply #2 on: March 03, 2008, 09:08:34 21:08 »

I appreciate the response but I cannot see the link.  My account is in an inactive state.  Sad 
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quark576
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« Reply #3 on: March 03, 2008, 09:44:52 21:44 »

I hope you help.

http://www.hobby-boards.com/catalog/links/ld3.6-r1/Lightning%20Detector%203.6%20Schematic.pdf
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tuvoj
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« Reply #4 on: March 07, 2008, 07:49:13 07:49 »

Quick and easy detector can be made form a cheapo 9V transistor AM radio, tuned to lowest freq, with speaker output feeding an input circuit with a diode/cap pair sourced to pulse on the "crackle" from the audio output, which can tehn be conditioned through a CMOS 4004 or such gate to feed normal CMOS or TTL circuitry downstream...

Did this in school for a day-project, and worked like a charm (total outlay--5.00US!)

Cheers-Tuvo
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caveman508
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« Reply #5 on: March 07, 2008, 08:19:20 08:19 »

Tuvo,

That is a BRILLIANT and SIMPLE solution !

KISS (Keep It Simple Stupid)

I want you on my design team ! ! !

Caveman
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donno
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« Reply #6 on: March 09, 2008, 12:59:36 12:59 »

Sweet...and plenty of isolation! scarry some of the solutions that have been tried, have resulted in
BLACKENED faces (and hands and feet...etc!) and destruction of expensive equipment.

Although other sources of LF noise can affect your design most can be filtered.

Good stuff....I like it!
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abdullahshawky
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« Reply #7 on: March 15, 2008, 12:16:49 00:16 »

you can detect the change in light

put the following in a dark place that can recieve the light of the lightning use a photo resistor in series with a variable 5k resistor

the photo resistor will change in resistance from 1 M ohm to simple ohms as the surrounding enviroment is changed from dark to light

thats it it will cost around 1 $
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picette
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« Reply #8 on: March 15, 2008, 03:08:29 15:08 »

This site may give you some ideas

http://www.sheepdogsoftware.co.uk/sc4swdl.htm

-picette
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Walkura
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« Reply #9 on: April 30, 2008, 06:26:59 18:26 »

There been some article in epe a few years back but i really don't have a clue when  Roll Eyes .
What i can tell you is that it was from a torrent file with 6 years of epe .
Maybe its still available on the web .

Good luck .
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