Quantity   Component name
2 × NPN signal transistor e.g. BC237
1 × PNP signal transistor e.g. BC557
3 × diode e.g. 1N4148
1 × SMD LED green
1 × OPAMP MPC6021
1 × 100 uF electrolytic capacitor
1 × 47 uF electrolytic capacitor
1 × 220 nF capacitor
1 × 1 kΩ resistor 5%
3 × 10 kΩ resistor 5%
1 × 100 kΩ resistor 5%
1 × 220 Ω resistor