Figure 2.

Klaipeda University programmed the laboratory switching mode power supply system, which includes the HCS-3602-USB power supply (i–xiii, display (i), indicator (ii), voltage regulator (iii), current regulator (iv), on–off switch (v), auxiliary current output up to 5 A (vi), high current output (vii), sensor input (viii), control mode switch (ix), recall switch (x), connection to computer (xi), cooling fan (xii), power cord socket (xiii), USB connection (xiv)), including variable frequency voltage source with the flyback transformer (17–50 kHz), high-voltage cables, and using data acquisition equipment for NTP [53].