Quantity   Component name
2 × LDS-3492AS 4 digit 7 segment display
1 × SN74HC595N Shift Register
1 × 16 MHz Crystal
1 × ATmega328P Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
8 × 2N2222 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs