A basic circuit that had minimal noise with an Op Amp circuit i have been working on… if you have very little space, this might be an option for you.
Votage Regulation via
LM78XX & LM79xx (LM7805 LM7809 LM7812 LM7815 LM7818)(LM7905 LM7909 LM7912 LM7915 LM7918)
You will need to use a centre tapped transformer for this to work… eg 15v-0v-15v
DIY Etch at home files available HERE
This is as basic as i could make it… and with a toroidal transformer there is minimal noise… i would not use this for Audio, but if you have a small case this circuit might be ok.
Diodes are 1N4004
C1 & C3 are 50v 1000-2200uf
C2 & C4 are 10uf 63v
IC 1 is LM78xx
IC2 is LM79xx
Bridge Recitifier is a KBP01
You will need to supply AC 3v or so higher than what you want the output voltage to be, Youc an solder cables directly to board, but better to use screw in terminals.
All pads and traces as large as i could make them.
Board Assembly Difficulty: Easy
Drilling Size: 1mm