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Storm Detector Circuit

This storm detector circuit is very easy to build. It has a sensitive amplifier and one antenna, that togheter can detect storms at large distance. The antenna has 220 turns of enamelled copper on a square wooden frame with a side of 85 cm. The wire diameter is not so important, 0.4 mm is enough.

In parallel with the end windings a capacitor is connected in order to obtain a tuned antenna on a frequency between 4 to 5 kHz. The antenna is connected through 2 twisted wires to the amplifier. The output signal can be applied to an audio amplifier or an oscilloscope in order to hear or see the signal.

Storm Detector Circuit Diagram

Storm Detector Components List

R1 = 100KΩ
R2 = 100KΩ
R3 = 1.8KΩ
R4 = 600Ω
C1 = 10nF
C2 = 10µF/25V
C3 = 100µF/6.3V
T1 = T2 = BC547, 548, 549

4 Comments

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  • Ganesh

    Very Interesting. but when connected to an audio amplifier what kind of noise will be heard when the storm is detected. can we hear the lightning sound or what will it be.

  • roger blackman

    Great, easy looking circuit. However, I would like to know what kind of audio signal to expect w an approaching storm and how it would change w changing distance. I live in Texas, be nice to have!

  • osman

    teşekür ederim güzel bir başlangıç şeması olmuş daha iyilerinide siteye koyun. metal dedektör devreleride koysanız iyiolur tabiki piyasada kullanılan dedektör devreleri olsun çok teşekür edeim site yi yapan arkadaşa

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