DUAL OUTPUT STABILIZER POWER SUPPLY SCHEMATIC DIAGRAM
Please take a note that this circuit require center tap transformer. for example, if you need 12v output, you should connect J1 to 15v transformer output, J2 connected to 0v and J3 connected to another 15V.
CIRCUIT 0-30V STABILIZED VARIABLE POWER SUPPLY WITH CURRENT CONTROL SCHEMATIC DIAGRAM You will able to adjust the output voltage from 0 volt up to 30 volt DC. You also able to adjust the current output value from 0.002 A to 3 A.