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 Post subject: The Lightning Detecor
PostPosted: Jan Tue 24, 2017 7:20 pm 
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Joined: Jan Mon 23, 2017 6:39 pm
Posts: 6
Hey ho, here is my now ended long term project, a lightningdetector on 500kHz for portable and station use... As receiver there is a Tecsun 2P3 Circuit (These are very sensitive...) and as detector the circuit from teclib.com with a little amplifier... The two switches are Cut off the powersupply for detector and receiver and the three knobs are for detector sensitivity, Meter sensitivity and AF gain.
So when there is a thunderstorm, the crackles will be displayed on the meter and the LED is flashing.

This is the testbreadboard:

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Lightning1.jpg
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lightning2.jpg
lightning2.jpg [ 90.24 KiB | Viewed 1603 times ]


And here is the little modded LED ;)

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lightning3.jpg
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The complete device:
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IMG_20160721_001601-01.jpg
IMG_20160721_001601-01.jpg [ 74.03 KiB | Viewed 1603 times ]


The electronics:

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Lightningdetector4.jpg
Lightningdetector4.jpg [ 71.56 KiB | Viewed 1603 times ]


And here is a Video with no audio commend, these ones with are in german :P
https://www.youtube.com/watch?v=zof8VrsISAU


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Tue 24, 2017 10:59 pm 
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Joined: Jun Tue 02, 2009 3:38 am
Posts: 1268
Location: Albuquerque, NM
Very cool! I made one of these and unfortunately it didn't work, but I love the analog meter idea! I think my problem was the device was too small and putting it all together affected the frequency it was tuned to.

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-Kyle


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Wed 25, 2017 4:12 am 
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Joined: Aug Fri 29, 2014 6:17 pm
Posts: 2349
I had a cross needle hf transmatch that fed a 80ft sloper, and it made for a dandy storm alert. If a storm was within say 100 miles the needles would rise and peg until the charge arched over and the process would start again. It also did this for wind, dust, and snow that was blown along the antenna wire.


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Wed 25, 2017 4:40 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 11438
Location: S. Dartmouth MA 02748-1225 USA
Golf courses use lightning detectors and sound a warning horn long before clouds appear...

http://www.skyscanusa.com/tag/lightning-safety/

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"That was your last Chump Line message, Thank You for calling Howie Carr, You Chump"


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Wed 25, 2017 7:40 pm 
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Joined: Mar Tue 03, 2009 11:12 pm
Posts: 1349
Location: Hutchinson KS
Decades ago I was at a family gathering in Silver Dollar City of Branson Missouri and after waiting in line forever and walking to the top of a water powered log ride of some sort there was an announcement that the ride is closed because of lightning in the area. Not a cloud in the sky......


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Wed 25, 2017 8:00 pm 
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Joined: Jun Tue 02, 2009 3:38 am
Posts: 1268
Location: Albuquerque, NM
It's not very common but there are types of lightning strikes that will start at the top of a thunderhead and go around the entire storm to strike up to 30 miles away from the edge of a storm. These also have HUGE energy potentials and are therefore the deadliest.

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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Sat 28, 2017 7:02 am 
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Joined: Sep Sat 27, 2014 4:24 am
Posts: 1358
Location: Oxford, MI
Cool device, but curiosity has gotten the better of me. What kind of batteries are those in the first picture being used to power the device? They look like old batteries for pocket flashlights.

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Caretaker of Portable Tube Radios


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Mon 30, 2017 2:41 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7742
Location: Cleona, PA
4.5 volt batteries for pocket flashlights, right. They were used in Europe previously but now, not so much.

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Reece


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 Post subject: Re: The Lightning Detecor
PostPosted: Jan Mon 30, 2017 3:08 am 
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Joined: May Sat 25, 2013 11:15 pm
Posts: 1423
Location: Central Iowa, USA
Way cool!
I have converted three old AM receivers to lightening detectors over the years, but none looked that good!

Rob


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