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JOPRE

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i did this circuit on general purpose PCB but every time it will burnt the transistor and transformer.

[Mod Edit: Poll Removed]
 

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Why is there a poll with nonsense options?
Regarding the circuit,what transistor are you using and what is the input voltage? Polarity of the transformer?
 
Success or failure depends greatly on the transformer design/characteristics. Something of a black art. That's why most people choose to buy an off-the-shelf switch-mode power supply rather than try to build their own.
 
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