Lightning detector tester

Discussion in 'Wireless & RF Design' started by samuel.whiskers, May 21, 2014.

  1. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
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    I'm building the lightning detector from techlib.com - schematic from that webpage attached.
    It is apparently a simple receiver tuned to receive RF signals at approx 300kHz emitted by lightning.

    The author of the circuit shows a simulator circuit you attach to the antenna of the detector.... I have built this, and it seems to act the way the author suggests - but I was wishing to build a simple transmitter to test the detector in a real sense - would only need to transmit several inches or so. I've thought of making a 555 oscillate at 300kHz and running an antenna from the 555 output....

    Would this work?
    Any other suggestions to make a burst of 300kHz RF??

    (As indicated above - below circuit is from techlib.com - by C.Wenzel )
     
    Last edited: May 21, 2014
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Try a piezo gas igniter.
     
  3. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
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    I've seen that one suggested - will give a try.... I have an old Jacobs Ladder in a box somewhere as well, I figure it would probably do the same, but I was also hoping to actually reproduce in a circuit what the circuit is designed to detect.
     
  4. alfacliff

    Well-Known Member

    Dec 13, 2013
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    it is just looing for a burst of wideband noise. if you have an old fashoned buzzzer, they kind with a set of contact points and a coil, that will also work. 300 khz is just used on that circuit so there can be some selective gain to keep out broadcast am stations.
     
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    You could also try holding the circuit close to an operating CFL or SMPS.
     
  6. alfacliff

    Well-Known Member

    Dec 13, 2013
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    on the same circuit site ia a simple lightning simulator for testing lightning detectors.
     
  7. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
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    I've built that in preparation for completing the detector tonight, was hoping to try actually transmitting some RF to trigger it also....
     
  8. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    It could also be done by dragging a wire across a piece of rusty metal, with a decent amperage PSU (like a 12v battery charger).
    :)
     
  9. samuel.whiskers

    Thread Starter Member

    Mar 17, 2014
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    Well, so far the lightning simulator seems to do nothing.... but the fluorescent tube over my bench gets the detector flashing when it starts! I'll assume this means I'm working, and I'll wait for a storm.... :)
     
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