I want to make a power supply for 1W LED bulb.AC main voltage is 230.

 

Capacitive power supplies are potentially LETHAL. Use an isolated supply (transformer-based, or SMPS).

 

Welcome to the AAC forum.

The owners of All About Circuits has elected not to host discussions of transformerless threads.

This thread is against the AAC forum rules, Terms of Service (ToS).

Any kind of over-unity devices and systems
Devices designed to electrocute or shock another person
LEDs to mains
Phone jammers
Rail guns and high-energy projectile devices
Transformer-less power supplies
Terms of Service (ToS).

Transformerless power supplies of any kind are strictly forbidden. Therefore, this thread will be closed.

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You might find answers to your questions in one of these forums:

http://forum.allaboutcircuits.com/showthread.php?t=54400

Another good forum that shares many of the same membership is http://www.electro-tech-online.com/ .

Good luck.