Abstract: An Unmanned Aerial Vehicle (“UAV”) system includes a UAV configured for lifting, positioning, and placing irrigation lines on a heap including side slopes. The UAV can be equipped with an irrigation line support structure configured for supporting, transporting and/or releasing one or more irrigation lines. Placement of the irrigation lines via the UAV system can enable accurate distribution of raffinate solutions to enhance leaching efficiency in areas which are typically difficult to access.

Abstract: A transformerless charging system including a charging circuit including a first switch and a second switch, a first sensor assembly configured to measure a voltage of the battery, a second sensor assembly configured to measure a voltage of an input power line, and a third sensor assembly configured to measure a current of the charging circuit. An electronic processor is configured to receive a voltage of the battery, receive a voltage of the input power line, compare the voltage of the battery to the voltage of the input power line, and in response to the voltage of the input power line being greater than or approaching the voltage of the battery, turn off a PWM signal to the first switch, and with the PWM signal off, receive a current of the charging circuit and, in response to the current of the charging circuit being 0 Amps, open the second switch.

Abstract: Circuits and methods for driving a load are disclosed. An exemplary driving circuit may include first and second switching devices electrically connected with each other in parallel. The driving circuit may also include a current sensing circuit configured to generate a current sensing signal indicating a value of a current flowing through the first switching device. The current sensing signal may include an offset caused by parasitic inductance imbalance in electrical connections connecting the first and second switching devices. The driving circuit may further include a driver circuit configured to control switching operations of the first and second switching devices. The driver circuit may include an overcurrent protection circuit electrically connected to the current sensing circuit.

Abstract: Circuits and methods for driving a load are disclosed. An exemplary driving circuit may include first and second switching devices electrically connected with each other in parallel. The driving circuit may also include a current sensing circuit configured to generate a current sensing signal indicating a value of a current flowing through the first switching device. The current sensing signal may include an offset caused by parasitic inductance imbalance in electrical connections connecting the first and second switching devices. The driving circuit may further include a driver circuit configured to control switching operations of the first and second switching devices. The driver circuit may include an overcurrent protection circuit electrically connected to the current sensing circuit.