Quantity   Component name
3 × 555 Timer Buy: http://bit.ly/2KKuYZR
3 × Tactile Switch Buy: http://bit.ly/2zzxoGu
1 × BC547 Transistor Buy: http://bit.ly/2QtA95X
1 × Buzzer Buy: http://bit.ly/2Eah1UX
3 × Red LED Buy: http://bit.ly/2Q5W5oq
3 × Green LED Buy: http://bit.ly/2U39Dzf
3 × 1N4007 Diode Buy: http://bit.ly/2PhBjgk
4 × 10k Ohm Resistor Buy: http://bit.ly/2Q3ZK5Y
3 × 1k Ohm Resistor Buy: http://bit.ly/2FT73c9
1 × Breadboard Buy: http://bit.ly/2AFJkpQ