Lightning Detector Cicuit

Discussion in 'General Electronics Chat' started by cjdelphi, Feb 5, 2011.

  1. cjdelphi

    Thread Starter New Member

    Mar 26, 2009
    272
    2
    All i'm going to say is.... Way Cool :cool::cool::cool::cool: I'm going to Jaycar in the next couple of days to source the components anyone else made something similar like this already? any advice before i Begin? cheers


    http://www.electroniq.net/radio-frequency/lighting-storm-detector.html

    This storm detector electronic project it's in fact an receiver tuned to 300 kHz designed to detect the crackle of approaching lightning. A bright lamp flashes in synchrony with the lightning bolts indicating the proximity and intensity of the storm.
    The flasher is biased to not flash until a burst of RF energy, amplified by the 2N3904, is applied to the base of the 2N4403. The receiver standby current is about 350 microampers.
    To increase sensitivity of this storm detector you must use a longer antenna.
    Adjustment of storm detector is very simple : adjust the potentiometer until the flashing is stopped .
    When storm detector it's adjusted, the lamp will occasionally flash when big electrical motors or appliances switch on and off and an approaching storm will give quite a show. Adjust the pot with no antenna if lightning is nearby.




    [​IMG]
    Notation Value/Description L1
    L2
    R1
    R2
    R3
    R4
    R5
    R6
    C1
    C2,C3
    C4
    C8
    C9
    D1
    Q1,Q3,Q4
    Q2
    R10(pot) 10mH
    330uH
    180k
    3.9k
    22k
    2.2k
    2.7k
    47 ohmi
    680pF
    0.01uF
    0.005uF
    100uF
    1uf
    1N914
    2N4401
    2N4403
    20k
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    I wonder why the PNP transistor is connected upside-down?
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    I used something similar in 1970s to inhibit alarm response to thunder clap. Front end broad tuned to 100KC, diode detected into a comparator & 555 30 sec. alarm squelch. Used about 1 ft. ant. No schematic in file- just imperfect memory, fut it did help.
     
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