close-up of ferrite core coil with copper wire and resistors or capacitors on pcb detail

blue board capacitor choke circle circuit closeup coil component conductor copper core design detail device electric electrical electricity electromagnet electromagnetic electronic electronics electrotechnics electrotechnology energy engineering equipment ewaste ferrite ferromagnetic field green hole impedance inductance induction inductor industry macro magnetic material metal mount network nobody orange part pcb power recycle repair research resistor ring science service small smd smt sorting spare store supply surface technical technology through toroid toroidal twisted voltage white winding wire wrapped