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0-50volt variable regulator electronic project

A very simple variable power supply circuit can be made using this electronic circuit diagram .This variable regulator circuit will provide an variable regulated output voltage , between 0 and 50 volts . The CA3140 operational amplifier compares the regulator output to a reference voltage , that depends on the R9 value . The output voltage will be nominally twice the voltage between the positive input ( noninverting ) of the CA3140 and ground . The unregulated input voltage must be around 60 volts .
The output voltage can be set between 0 an 50 volts using R9 potentiometer .
The 2N3055 transistors must be mounted on a heatsink , to prevent the overheating of transistors .

Electronic Circuits: 
Circuit Diagram: 
0-50volt variable regulator electronic project