This Adjustable regulated power supply circuit uses voltage regulator LM723 IC which are already well known. IC LM 723 is designed to provide a voltage of 2-37 volt supply voltage with 150mA current, and this current is small indeed, but with the help of an external transistor can be achieved current up to 10 A, and in this circuit can provide voltage 3-30V and is limited to 2.5 A currnt with the help of TR2.
Below is a PCB layout of the Adjustable-regulated power supply 3-30 V / 2.5 A :
Adjustable regulated power supply 3-30 V / 2.5 A parts list :
R1 = 560R 1/4W R2 = 1,2 K 1/4W R3 = 3,9 K 1/4W R4 = 15K 1/4W R5 = 0,15 R 5W C1 = 100nF C2 = 2200uF 35-40V C3 = 100 pF C4 = 100uF / 35V P1 = 10K potensiometer D = B40 C3300/2200, bridge rectifier 3A TR1 = BD135 TR2 = 2N3055 IC = LM723
