copper coil or inductance coil on circuit board in power supply, electronic components inside computer power supply unit box

design art iron pattern line font number circle electronics wall toy lighting gadget flooring signage machine copper coil inductance circuit board power supply electronic components inside computer unit box technology box metal industry environment electronic pollution repair aluminum hardware service copper device wire aluminium power disposal transformer macro circuit wiring capacitor pcb resistor stack frequency electromagnetic condenser reactor coil inductor inductance circuits conductive unit ferrite electrolytic small subsystem inside waste mount disassembled plated discarded technique integrated psu refuse spare