Quantity   Component name
1 × Atmega328p Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × Switek x27 stepper motor
2 × MAX7221 7-segment display driver
1 × L293D Motor Driver IC
9 × small 7-segment displays (8 red, 1 orange for tenths of a mile digit)
1 × US3881 Hall Effect Latch IC
1 × Diametrically-magnetized ring magnet
1 × resistors, capacitors, xtals, etc.
1 × Probably some glue