Quantity   Component name
1 × 555 Prototyping Products / PCB Chemicals
1 × LM358 Amplifier and Linear ICs / Operational Amplifiers
3 × 1k resistor
1 × 47k resistor
1 × 220k resistor
1 × 1nF capacitor
1 × 100nF / 330nF /470nF capacitor
1 × 3k9 / 4k7 / 10k resistor
1 × 1k / 2k5 / 5k potentiometer
1 × CNY70 Sensors / Angle, Position
1 × LM358 for the amplifying stage Amplifier and Linear ICs / Operational Amplifiers
2 × 10k resistor
1 × 22k resistor
1 × BC635 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × speaker 8R
1 × 10M resistor several for stability
1 × 1N4148 several for stability