toroidal transformer coil. colorful wire winding on inductor with ferrite core

background blue blur blurred board bokeh capacitor choke circle circuit closeup coil colorful component copper core design detail development device disassembled dismantled electric electrical electromagnet electronic electronics electrotechnics electrotechnology engineering ferrite ferromagnetic field focus green holder inductance inductor industrial industry inverter laboratory macro magnetic material network nobody nopeople old orange part pcb power red repair research resistor ring round science selective shape shop soldered spare store supply technical technology tin toroid transformer twisted unit varistor white winding wire yellow