Would you tell me how this simple circuit works, Please?

Discussion in 'General Electronics Chat' started by Michael George, Dec 17, 2015.

  1. Michael George

    Thread Starter Member

    Feb 8, 2015
    This circuit is a high frequency oscillator, and I think it produces high voltage. It is something like Tesla coil.
    How this circuit oscillates? I can not find any resonance or something like that ?
    What is the frequency of the oscillation?
    Thank you very much,
    Tesla coil 2.png
  2. MaxHeadRoom


    Jul 18, 2013
    The 3 turn coil creates positive feedback ='s oscillation.
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  3. ian field

    AAC Fanatic!

    Oct 27, 2012
    The feedback is the tail of the secondary - there has to be some load current for the oscillator to work.

    It has some similarities to the photoflash inverter in a disposable camera. That arrangement boosts the oscillator to charge the capacitor rapidly, as the cap comes up to full charge; the feedback current tails of until the oscillator is just idling - so it can be left in a state of readiness without undue battery drain.

    The camera inverter usually has a base drive winding in addition to the secondary side feedback boost. Its pretty much the blocking oscillator of Joule thief fame.
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  4. Darrell Teegarden

    New Member

    Sep 8, 2015
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