circuit for 220VAC to 9VDC?

[cool]

I would like to make the smallest circuit for converting 220VAC to 9VDC~ any suggestion for the circuit?? can i don't use the transformer??? :roll:

 

[udi_hakim]

Sorry but you have to use a transformer as far as i know because of the high current of the AC voltage , the size of the transformer is depended on how current would you like to draw from it.

I drew a circuit for a regulated 9VDC

1 * The parts you need:
1 * Transformer from 220AC to 12VAC
1 * Diode bridge
1 * 470uF capacitor
2 * 0.1uF capacitor
1 * 7809

 

[Styx]

if you have the £££ get a VICOR DCC converter, ther are isolated and converts straight from mains to low voltage levels. You just need a rectifier and a DC cap. This removes the need for the transformer

 

[patroclus]

When you say 220VAC to 12VAC, it reffers to 12VAC RMS value? or peak value?

 

[cool]

thanks all experts!!! :lol:
what is £££ and how to get a VICOR DCC converter???
can u please tell me more about it??? :shock:
thanks~

 

[ragab2010]

thank youu

 

[tcmtech]

If you don't need line isolation or much power then a simple capacitor coupled circuit consisting of a Mylar AC rated capacitor, a 9 volt zener diode and an electrolytic capacitor is all you need.

 

[Bettina Neumeyer]

Use a transformer

Hi folks ... first post/reply on this group.

I would suggest the person use a transformer type circuit ... anything direct off the mains is a dangerous situation.

Cheers!

Bettina

 

[jpanhalt]

The OP has not been back since March, 2004. Whatever the outcome was, I doubt we are going to change it today. John