When you build , electronic project , that have to use , power supply regulated source.
I thinks you might something the circuit that has the height and economize with.
I begs for to advise this circuit , because use voltage regulator Ic 78XX series series.
By you can change Voltage get follow want , 5V = IC 7805 (5v voltage regulator), 6V = IC 7806, 8V = IC 7808 ,
9V = IC 7809 , 12V = IC 7812 such as. By still use PCB and other equipment as before.
To use transformer 1-2A. IC-78xx to Hold Heatsink.
Source: PK kit Circuit