–  Transistors: BC557 x 1 , BC547 x 2

–  Resistors: 1Kohm, 4k7 x 2 , 100 ohm , 330 ohm

–  Buzzer x 1

–  Red LED x 1

–  Capacitors: 470uF/16V, 1uF/50V, 10uF/50V x 2

And one IR Sensor Module.

+ Light Switch Sensor Circuit

yarbnas.com source