can any one provide me wd the circuit for switching power supply that is working !!!plz

 

Hello,

As no specifications are given, I can only give some linkpages of them:
http://educypedia.karadimov.info/electronics/powerelectronicssmps.htm
http://educypedia.karadimov.info/electronics/circuitssmps.htm

Bertus

 

These circuits are not hard to find you can look for circuits of these types since they are common but you have to make sure they work.

 

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