Circuit boards; Fuse wire; Integrated circuit module; Light emitting diodes (LEDs); Microcontrollers; Relays, electric; Resistances, electric; Traffic-light apparatus; Transistors; Voltmeters; Antennas for wireless communications apparatus; Electric wires and cables; Electronic key cards; Internal cooling fans for computers; Measuring rulers; OLED (Organic light emitting diode) display panels; Optical lenses; Temperature sensors; Voltage regulators; Voltage stabilizers