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12V Transformerless PSU

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E

ex4

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transformerless 12v

Hello
i need schematic on transformerless PSU with this spec :
- AC IN 220V
- DC OUT 12V or adjustable using regulator ic
- dc current minimum of 500mA
thanx
 

12v transformerless

It won't have any isolation making it dangerous. It is bound to be as bulky as a transformer option because it will need a high voltage/high ripple current capacitor as the AC dropping element and maybe another high wattage resistor.
 

transformerless 220v to 12v

yes, but there is simplicity in it (as far as i've found on the net)
and about the isolation, a small audio transformer 600ohm:600ohm will do the job
 

**broken link removed** is the basic idea
 

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