Quantity   Component name
1 × LDR Resistor Networks / Thick Film Networks
1 × BC 547 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × LED Fiber Optics / Emitters
1 × RESISTOR 220R current limiting resistance
1 × POTENTIOMETER 100K
1 × BATTERY 9V