Quantity   Component name
1 × LM555.
1 × Diode bridge
1 × Speaker 8 Ohm 0.25W to 1W.
8 × Pushbuttons
1 × Electrolytic capacitor 4700µF
1 × Electrolytic capacitor 22µF
1 × Ceramic capacitor 103
1 × Ceramic capacitor 104
2 × 10k Ohm 1/4 W Resistors
1 × 8.2k Ohm 1/4 W Resistor
1 × 6.8k Ohm 1/4 W Resistor
1 × 5.6k Ohm 1/4 W Resistor
1 × 4.7k Ohm 1/4 W Resistor
1 × 3.3k Ohm 1/4 W Resistor
2 × 2.2k Ohm 1/4 W Resistor
1 × Old PC CD Player