various electronic components at green pcb in e-waste heap detail

beeper black blue blur board bokeh buzzer capacitor chip circuit closeup colored component computer connector design detail device discarded disposal dump eco ecology electric electrical electromechanics electronic electrotechnics electrotechnology engineering environment equipment garbage green hardware heap industry junk junkyard macro mainboard many motherboard network nobody obsolete old parts pcb piezoelectric power printed recycle red repair resistor rubbish separation service sorting stack store supply technical technology transistor trash uninterruptible ups used various waste yellow