# 0-30V Stabilized Variable Power Supply with Current Control

This is high quality 0-30v stabilized variable power supply circuit 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. This variable power supply incorporates an electronic output current limiter that effectively controls the output current from a few mA (2 mA) to the maximum output of 3 A that the circuit can produce.

Component list:

R1 = 2,2 KOhm 1W
R2 = 82 Ohm 1/4W
R3 = 220 Ohm 1/4W
R4 = 4,7 KOhm 1/4W
R5, R6, R13, R20, R21 = 10 KOhm 1/4W
R7 = 0,47 Ohm 5W
R8, R11 = 27 KOhm 1/4W
R9, R19 = 2,2 KOhm 1/4W
R10 = 270 KOhm 1/4W
R12, R18 = 56KOhm 1/4W
R14 = 1,5 KOhm 1/4W
R15, R16 = 1 KOhm 1/4W
R17 = 33 Ohm 1/4W
R22 = 3,9 KOhm 1/4W
RV1 = 100K trimmer
P1, P2 = 10KOhm linear pontesiometer
C1 = 3300 uF/50V electrolytic
C2, C3 = 47uF/50V electrolytic
C4 = 100nF polyester
C5 = 200nF polyester
C6 = 100pF ceramic
C7 = 10uF/50V electrolytic
C8 = 330pF ceramic
C9 = 100pF ceramic
D1, D2, D3, D4 = 1N5402,3,4 diode 2A – RAX GI837U
D5, D6 = 1N4148
D7, D8 = 5,6V Zener
D9, D10 = 1N4148
D11 = 1N4001 diode 1A
Q1 = BC548, NPN transistor or BC547
Q2 = 2N2219 NPN transistor
Q3 = BC557, PNP transistor or BC327
Q4 = 2N3055 NPN power transistor
U1, U2, U3 = TL081, operational amplifier
D12 = LED diode

## 19 thoughts on “0-30V Stabilized Variable Power Supply with Current Control”

1. ROSS says:

hi
Im looking for a good detail explanation of how his circuit works if some could provides his it would be very much appreciated.
many thanks ross

2. phanvanthanh says:

Sir , can you send me a Electronic diagram of PCB of AutomaticA.C supply stabilizer
Output power : 32KVA – 1650 KVA Curren rating : 50A – 2500A
Thank you .

3. Pieter says:

Please send me the connection on the PMLCDL current side of the 0 ? 30 V variable power supply this will me a lot THANHS PIETER

4. circuit diagram says:

sorry i don’t have the circuit…

sir,please send me the circuit diagram of dc voltage regulator in range of voltage 30-50 volts

6. Ghulam Dustgeer says:

sir pls srnd me the circuit digram of dc power suply with doides

7. pcb says:

Would this diagram work for powering stepper motors?

8. ALI RAZA(OPTICAL ELECTONIC)ENGNRING IN GIKI) says:

SIR pleas send me circuit diagarm of variable voltage suupplier ranging from 1.2 to 37v(LM317) asap………….

9. Sukhvinder says:

Please Send me the diagram and pcb layout for the smps,thanks

10. imtiaz khan says:

sir i need simple circuit mostly made from diodes rather then transistors

11. tatenda says:

please can you send me the wiring diagram of a 0 – 30 V variable power supply including the block diagram

12. Abdul majeed says:

hello, all,
i 63 years old man and have not any job with me,
I m searcing on web. for electronic,
if any body need a pcb lay out of any schematic i will make and provide in adoba formate (free of cast)
if needed PCb then one PCB ian provide but it will chage the price for the material paking postage etc,
waiting for yuor choice
Thank you
Abdul Majeed
amtahir786@yahoo.com

13. Max says:

14. Bongi says:

Sir, please email me a circuit diagram of 30V stabilised power supply

15. owell says:

SIR,PLEASE SEND ME A CIRCUIT DIGRAM OF 0-30V POWER SUPPLY AND PCB. THAnk you

16. S.I. Mkhwanazi says:

sir pls help me n send me the applications of d stabilised power supply with voltage and current display. also help me andastand the use of the component called ‘transport’ in that design.

17. AYAN says:

SIR,PLEASE SEND ME A CIRCUIT DIGRAM OF 0-30V POWER SUPPLY AND PCB. THAnking you

18. L,K.TARTE says:

SIR,PLEASE SEND ME A CIRCUIT DIGRAM OF 0-30V POWER SUPPLY AND PCB. THAnking you

19. mark wayne says:

i would like to request a schematic diagram of wireless variable regulated power supply;;;tnx