Hi guys first of all sorry for the poor image cause I don't have an editor.
How can I modify this circuit from 240v supply to 12v led bulb not 18v?
Thanks

 

That is a very dangerous design. There is no isolation from the mains.

A transformer will be somewhat more expensive and bulky, but it won't kill you like the circuit you posted very likely will.

 

That is a very dangerous design. There is no isolation from the mains.

A transformer will be somewhat more expensive and bulky, but it won't kill you like the circuit you posted very likely will.

Indeed. The phase will surely be present at the output on both terminals. So even if the voltage between them is just 18V, you will get a shock when touching one, if you don't get killed in the meantime.

Sorry if I'm not optimistic, but the danger is very real. My advice is not to.

 

Use a 12V transformer. They are several orders of magnitude less expensive than funerals or hospital visits.

 

yeah, totally uncool and unsafe 'design'.. maybe natural selection's final frontier?

 

Hi guys thanks for the warnings yes it is dangerous but this is for a led bulb which is going to be sigiled in a holder.It is not going to be used like other transformers.
Any help please?
Thanks.

 

Sorry, it's just too lethal. Buy a wall wart. Do not fool around with any transformerless power supply.