Quantity   Component name
2 × Protoboard
1 × AT89S52 Microprocessors, Microcontrollers, DSPs / Microcontrollers (MCUs)
6 × 7 segment displays
6 × Transistors
6 × Resistors for power up of the display
7 × Resistors for the segment display Resistor Networks / Thick Film Networks
1 × Interruptor to show the alarm or the real time
2 × push buttons to select time
1 × Buzzer
1 × Quartz Crystal