Quantity   Component name
1 × resistor 2.2k R1
1 × resistor 470 R2
1 × resistor 47k R3
1 × resistor 0-120 ohm R4
1 × diode 1N4148 D1
1 × diode zener 3.3V DZ1
2 × red LED LD1, LD1
1 × green LED LD3
1 × white LED (or LED chain) LD4
1 × transistor NPN Q1
1 × transistor PNP Q2