toroidal transformer with colored wire on ferrite core on a white background

transformer inductor electronic component wire isolated closeup case white background electrical toroidal coil winding engineering surface mount technology electrotechnics induction ferrite core ferromagnetic electromagnetic magnetic field material ring copper pin contact square packaging ceramic embedded epoxy assembly device energy power spare circuit single object design electrotechnology industry technical science repair supply green red colored macro colorful electromagnet voltage circle casing smd encased resin paste holder twisted wrapped equipment one service recycling black yellow components