irf9540 p channel power mosfet

irf510 n channel 100v power mosfet

2 inch 6 Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker

IR Break Beam Sensor – 5mm leds 

This IR break beam sensor works by detecting an object breaking a beam of IR light. This particular sensor has a range of up to 50 cm / 20″ and can be used with 3.3 or 5V.