Quantity   Component name
1 × Nokia 5110 LCD Screen Available in surplus from most good electronics websites
1 × Nucleo F401RE Development Board A nice cheap STM32 dev board
3 × 680nm laser module For detecting clear plastics and glass
3 × Light Dependant Resistor (LDR) For detecting clear plastics and glass
3 × Infrared Diode For detecting items regardless of opacity
3 × Infrared Receiver For detecting items regardless of opacity
2 × Rubbish Bin
3 × 22k Resistors Generates a voltage from the LDRs