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How to convert AC 230V to DC 12V without using transformer !

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SphinX

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convert 230v to 12v

Hi,

I saw a circuit that do that consist of few res and caps with 12V regulator (1w)

How that ?!

Amr
 

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transformerless ac 230v- dc 12v

There's a Microchip application note that shows you how to do it. Sorry but I don't have a link but search Microchip's site for 'Transformerless', also search Google, there have been many usenet posts.

You use the reactance of the cap to drop the voltage and then rectify it.
 
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