Battery fast charging circuit 2

It is mainly composed of main charging circuit, trigger circuit, constant current circuit and automatic charging and discharging circuit
. Adjust the potentiometer RPi to change the charging current.
  Since this circuit is directly connected to the mains, you must pay attention to safety when using it. The circuit uses a semi-controlled rectifier circuit , so
the power supply efficiency of the motor is not high. If the power supply is stepped down through a power transformer and a fully controlled rectifier circuit is used , the efficiency can be improved and the power supply is
safer.