printed circuit board with toroidal coil or green capacitors on black background

abstract background black board both capacitor chip choke circuit closeup coil component computer converter copper core cuprextit design detail device disassembled educative electric electrical electrolytic electromagnetic electronic electrotechnical electrotechnology energy engineering ewaste ferrite flying green hardware induction inductor industrial industry inside integrated macro micro mount nobody part pcb power recycling repair replace ring science semiconductor service shop sides spare spiral storage supply surface tech technical technology throughhole tin toroid underside voltage winding wire wrapped