Multifunctional OLED voltage current power temperature capacity time tester intelligent instrument -57314

lcr meter  multimetre вольтметр мультиметры miernik elektryczny fluke multimeter analog multimeter тестер транзисторов

Using Isolated Power Supply

The two power supplies must be isolated and don’t connect any load. The highest voltage of isolated power supply is 20V

Using DC-DC converter to power supply

The black thin wire connects nothing and you should use insulator wrap it to avoid short circuit. The DC-DC converter must be common cathode structure.

Using system to power supply

The black thin wire connects nothing and you should use insulator wrap it to avoid short circuit.