Adjustable Power Supply
the wiring diagram of the 50V, 15A A adjustable power supply provides a similar amount of current through the parallel work of four power transistors, which must be mounted on a good heatsink. The voltage adjustment is performed in integrated LM317, which also must be dissipated mechanically.
Variable DC Power Supply Circuit
50v /15a adjustable power supply
The bridge rectifier should be at least 50 volts and 20 amps. It is recommended to use metal mounted on the heatsink.