This is 0-30V 5A variable benchtop power supply circuit,Output voltage 0-30V and Current 5A max. Use IC LM723 is a voltage regulator designed primarily for series regulator applications. By itself, it will supply output currents up to 150 mA I so use Transistor 2N3055 X 2 for Booster current to 5A. IC CA3140 for Control Current and Voltage.
– P1-50K for control current.
– R20-50K for Adjustable voltage output.
– R19-5K for fine Adjustable voltage output.
– Transformer use 5-8A, Voltage see in circuit.
– Detail more see circuit
PCB Variable Regulator 0-30V 5A
Parts you will needs
IC1…..UA723
IC2…..CA3140
Q1,Q2…..2N3055
Q3………BC337
Q4………BC337
R1,R3………1.2 ohms 5W 5% resistors
R4……… 100 ohms 5W 5% resistors
R5,R7………100K….0.5W 5% resistors
R6…….. 2.2K 5W 5% resistors
R9,R10……. 1K….0.5W 5% resistors
R8…….100 ohms ….1W 5% resistors
R9,R10……. 1K….0.5W 5% resistors
R11………… 150 ohms 0.5W]5% resistors
R12………… 5.6K 0.5W 5% resistors
R18………… 3.9K 0.5W 5% resistors
R16………… 47K 0.5W 5% resistors
R13………… 1.5 ohms 0.5W 5% resistors
– P1-50K for control current.
– R20-50K for Adjustable voltage output.
– R19-5K for fine Adjustable voltage output.
– Transformer use 5-8A, Voltage see in circuit.
– Detail more see circuit
PCB Variable Regulator 0-30V 5A
Parts you will needs
IC1…..UA723
IC2…..CA3140
Q1,Q2…..2N3055
Q3………BC337
Q4………BC337
R1,R3………1.2 ohms 5W 5% resistors
R4……… 100 ohms 5W 5% resistors
R5,R7………100K….0.5W 5% resistors
R6…….. 2.2K 5W 5% resistors
R9,R10……. 1K….0.5W 5% resistors
R8…….100 ohms ….1W 5% resistors
R9,R10……. 1K….0.5W 5% resistors
R11………… 150 ohms 0.5W]5% resistors
R12………… 5.6K 0.5W 5% resistors
R18………… 3.9K 0.5W 5% resistors
R16………… 47K 0.5W 5% resistors
R13………… 1.5 ohms 0.5W 5% resistors
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