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AC finder

Discussion in 'General Electronics Discussion' started by donkey, Mar 27, 2014.

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  1. donkey

    donkey

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    Feb 26, 2011
    hey guys anyone got a circuit for an AC finder?
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    I find AC plugging my multimeter into a mains outlet :D

    What exactly do you mean? Probably something like this?
     
  3. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Good one Harald :)
     
  4. donkey

    donkey

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    Feb 26, 2011
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Have a look at eevblog. Dave pulled one of these apart and made mention of how they work.

    Essentially you have a cmos inverter with it's input left floating and attached to a short antenna. The rest of the circuit catches and extends pulses.
     
  6. donkey

    donkey

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    Feb 26, 2011
    cool ty
     
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