induction coil with copper wire winding soldered on printed circuit board

beige black blue blur board choke circuit closeup coil component computer copper core design detail device diode disassembled dismantled electric electrical electromagnetic electronic electronics electrotechnical electrotechnology engineering ferrite ferromagnetic field focus green hardware impedance inductance induction inductor industrial industry inverter laboratory macro magnetic network nobody nopeople orange part power repair research resistor ring round science selective service shiny soldered spare supply switched switcher tech technical technology toroid transformer twisted unit winding wire yellow