diy lightning detector - circuit 1

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Lightning detector

January 27, 2009 P. Marian 4 comments

category: DIY, Measure tags: lightning

This DIY lightning detector circuit is a very sensitive static electricity detector that can provide an early

warning of approaching storms from inter-cloud discharge well before an earth-to-sky return strike takes

place. An aerial (antenna) formed of a short length of wire detects storms within a two mile radius.

The circuit emits an audible warning tone from a piezo buzzer, or flashes an LED for each discharge detected,

giving you advance warning of impendig storms so that precautions may be observed.

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2011/03/06 DIY Lightning Detector

electroschematics.com/…/lightning-de… 1/4

The primary feature in the lighting detector is the circuit’s ability to be set close to self-oscillation, with its

relaxation optimised via the bias resistor values shown in the circuit diagram. The oscillator is dc coupled and

feedback is routed through the collector of TR1 to the base of TR2, while the overall loop gain is set with the

multiturn(12, 18 or 22) preset VR1.

Lightning detector setting up

To set up the lightning sensor, adjust preset VR1 for oscillation by monitoring test point TP1, which should be

at roughly 7volts peak-to-peak. Test point TP2 should be at +6V dc. Now readjust VR1 back slightly to

stop oscillation; use a screwdriver to touch the aerial-side of C1 several times; the alarm should sound for 1

or 2 seconds then stop. If it continues, make a very small adjustment back and recheck. The other method is

to electrostatically charge a plastic ruler and then draw your finger close to discharge, about two meter away

from the aerial.

Lightning detector schematic

Powered from a 9 volts battery the lightning detector circuit consumes about 600 uA in standby. Powered

continously it could provide a good year of uninterrupted monitoring.

When sounding the alarm, the current will rise to 4mA depending on the low current sounder WD1. A

minimum 3 volts device is required for a good output level and it will produce a “pinging” alarm to warn in

real time of any electrostatic pulse activity.

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Written by steven chiverton on July 8, 2010. Reply

the bc109 transistor aint selling at our closest electronics store so can i use the bc517 darlington

transistor, and if so what do i need to change in the lightening detector circuit to use that transistor

Written by Andrew on December 4, 2010. Reply

You wont be able to swap for a darlington type, try a bc548c, pn100 or a 2n2222

Written by ThierryD on December 17, 2010. Reply

You can find it a lightning detector for DSLR who works fine :

http://rienquepourlesyeux.free.fr/Detecteur%20de%20foudre/Lightning%20detector.htm

it is easy to make and for a very low cost.

It permit to take photo of lightning by night and by day

Written by jithin on January 13, 2011. Reply

i have tried out the mobile sniffer for my project and it came out well…. but i need some help with this,

how can i increase the range of detection of the mobile phones???????? plzzzz help me.

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