This LM723 variable power supply electronic project circuit diagram is a very simple variable power supply that will provide an output voltage between 8 and 30 volt at a maximum output current of 3 ampere .
This LM723 variable power supply electronic project circuit diagram has a very low output ripple voltage of 0.5mV and offer various protections like : shortcircuit protection and overload protection.
The MJ3001 transistor must be mounted on a well dimensioned heatsink .
The transformer output voltage of 30 volt at a minimum of 120 VA . Adjusting the RV1 potentiometer you will modify the output voltage of the power supply .