Quantity   Component name
1 × SMSD2313 (HDSP-2000 equivalent) Displays and Inverters / LED Displays
1 × UDN2981 Interface and IO ICs / Peripheral Drivers and Actuators
1 × Arduino Pro Mini
1 × DS3231 real time clock module with 1220 lithium coin cell
1 × Hook up wire PVC insulated 0.6mm copper single core hook up wire
2 × Push buttons SMT momentary (green and yellow)
2 × 10k ohm resistors Pull up resistors