design help

sup peeps.. im still a newbie when in comes to pcb designing and now i've come up with a project...just a very simple one..

im done making my design but i really doubt that there is still wrong with it..

im doing a 9v output power supply with a transformer that is
220v 12-0-12.. i cant attached my schematics since my copy is in my notes and i cant scan it cuz my scanner is busted..

heres the design:

i really really need your advice and corrections on this one... tHANx :roll:

i believe you have to connect the output 0v to the transformer centre-tap or 0v

If the trafo is center-tapped, no need bridge rectifier, just two diodes.

ok.. im gonna try ur advice.. and heres my schematics on the design if ever there are more corrections needed... THANX

Here is the correction...
But in C4 position no need 1000uF, 10uF quite enough.

thanx a bunch