I'm designing my first linear power supply for my project which needs dual rail 12V (the regulation from 15V to 12V is on another board, 7812 and 7912).
The +12V (+15V) rail will draw about 250mA, the -12V (-15V) rail will draw less than 10mA.
My main goal is robustness and reliability. So I put effort to mains filtering and protection.
There is no specific noise I want to protect from. Just noise and spikes that are reasonable in standard household.
(I do not have 3D model for the transformer, so it is not rendered in the middle)
Did I make some obvious mistakes here?
Or are there some reasonable improvements to make (to improve reliability, and safety)?
The X1 and Y1 capacitors have to have specific value? Have to be calculated? Or it just almost doesn't matter?