Today I would recommend a DC power supply that can adjust voltage and
current, another one circuit. It’s very interesting since is highly
effective, devices not very. This circuit has special feature that can
supply output voltage widely range is during 0.1V to 50V
With value of the load regulation changes not more than 0.005% between 0A to 1A.
-The stability of regulation, when change the input voltage, the criterion is 0.01%.
-The noise output signal under 250uV
-This circuit can provide an output voltage in a wide range by the number of IC-CA3130 by the input range is 0V.
-During the extension of the output voltage can not, by adding Q4
between this IC and transistor both series. This circuit has a high
threshold makes the regulation is accurately high level. Darlington
transistors T1/T2 and make a high enough flow. Q3 is the limited current
output. When the VR1 fully anticlockwise, Q3 current limit around 0.6A.
This current limit, it will not work When the VR2 rotate clockwise
until it stops.
Read more source : http://www.eleccircuit.com/circuit-power-supply-regulator-01-50v-1a-by-ic-ca3130-ca3086-2n3055/