induction coil, toroidal coil on a ring with visible copper helix and capacitors, mounted on a printed circuit board in a computer

220 board capacitor capacitors capacity choke circuit closeup coil computer converter copper core disassembled electric electrical electromagnetic electronic electronics engineering farad ferrite ferromagnetic field hardware helix inductance induction inductor industry inverter macro magnetic mounted passive pcb power printed resistor ring roll scroll soldered supply technology toroid toroidal transformer transistor twisted unit visible volt voltage winding wire wires