Capacitor - 47nF or 0.047uF or 473 / 50V
Optical broken module ( ARDUINO photo interrupter module )
100 Ohm - 1/4W Carbon Flim Resistor
5V 1A Li-Battery Micro USB Charger Module Li-ion LED Charging Board
DC 5V Infrared Diffuse Photoelectric Switch Sensor E18-D80NK 3 Wire - Proximity Sensor