Quantity   Component name
1 × TM1638
1 × ATTiny85 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × TL072 Amplifier and Linear ICs / Operational Amplifiers
1 × 74LS14 Electronic Components / Misc. Electronic Components
1 × 4-digit 7 segment display (common cathode)
1 × 2N7000 n-FET
1 × Electret microphone