green pcb detail with electromagnetic coil and electronic surface-mount components

16x9 assembly background black board capacitor circuit closeup coil component copper core cylindrical design detail device disposal electric electrical electricity electrolytic electromagnet electromagnetic electronic electrotechnical electrotechnics electrotechnology element energy engineering equipment ferrite ferromagnetic field green inductance induction inductor industry layer layout macro magnetic material mount network nobody nopeople orange part passive pcb power printed recycle repair resistor science service small smd smt spare spiral store surface technical technology twisted voltage waste winding wire wrapped