Regulator 0-30V 1A By Transistor (C1061)

This is simple dc voltage Variable regulator Circuit. I use the transistor 2SC1061 or H1061. It used for control current up to 1 Amp. The circuit use transistor 3 pcs only, it very small circuit. The Q3-C1061 must hole heat sink with. VR1 for control voltage 0-30V at 1A

The details
This circuit is easily designed for beginners to learn the operation of the regulated output circuit, because a majority of the circuits in now often made of the IC packages, which some of you might not like. When before we used the transistor circuit,
We readily can buy the equipments, cheap and be adapted easily substitute another number.
In addition when they are damaged you can repair with replacement the parts some pieces only, not need to replace them all with the same as the ICs.

In this circuit is designed be A series REGULATOR form that has very performance, you change the voltage output 0V to 30V by adjust the Potentiometer – VR1-10K, so it is controller a bias voltage of the transistor Q2-BC337.

The parts of circuit
R1,R2________10K 1/4W Resistors
R3,R4________100ohm 1/4W Resistors
C1_________1000µF 35V Electrolytic Capacitors
C2,C3_________100µF 35V Electrolytic Capacitors
Q1,Q2__________BC337 50V 800mA NPN Transistor
Q3__________2SC1061 or TIP41 or H1061 or MJE3055 50V 2A NPN Transistor
D1-D5__________1N4002 100V 1A Diode

Making this project
– Put the complete equipment correctly by the circuit.
– Enter the power into circuit, then uses a voltmeter measure the voltage output.
– Adjust the VR1, then notice meter should be changed as required.
– Try to connect the load to the circuit, The output voltage should be adjusted to a constant does not change.
– The Q3 should be equipped with a cooling medium size.

Regulator 0-30V 1A By Transistor (C1061)
Circuit 0-30V mini Variable power supply by C1061

PCB 0-30V mini Variable power supply by C1061


The other adjustable power supply regulator circuit, that use transistor is base of circuit please see below.

  1. DC Supply adjustable Voltage 0-20V at 1A
  2. Simple variable dc power supply 0-30V 2A for beginners

11 thoughts on “Regulator 0-30V 1A By Transistor (C1061)”


  2. she is raging coz it doesn’t work for her. admin, what should i change to achieve 3amps?

  3. meron akong mas simple na diagram,nkopya ko lang sa shop noong nagojt ako,subok na po ito,ngamit ko na sa pagcharge ng cp,katunayan ang dami ko na nbenta,kaso nga lang d ko dala ngayon yung kopya iniwan ko samin,dulot ng trabaho ko,eh baka kasi mawala,maybe by december ipost ko sa fb ko pagmakauwi ako,same components po yung c1061

  4. i have a simple diagram of c1061 which ive gotten from my ojt time,simple,but effective,i have copy,left at our home

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>