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

Thread Starter

Michael George

Joined Feb 8, 2015
53
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
 

ian field

Joined Oct 27, 2012
6,539
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,
View attachment 96748
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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