230VAC to 12VDc converter circuit

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Gundapparpatil

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hi
any one shall help me to come out the problem.
i want to build 230VAC to 12VDC circuit without transformer.
i need the circuit diagram and description.

regards
G R Patil
 

You need AC-DC flyback converter if high efficiency is required.
 

Perhaps an old AT/ATX PC powersupply could help?
 
Transformer less power supply is risky one. So can you tell me your requirement (application of the power supply) and specification of the power supply. Then only we can able to suggest the type of power supply to be used. Because you can do it by,
1. Capacitive
2. Zener Diode
3. SMPS

SMPS provides higher output Efficiency and high current output. Others may not be suitable for high Power application. But you can improve the power rating by cost.

Replay me with required specification and application, i will give you circuit. I had worked on it!
 
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