INFRARED

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. 

850nm Infrared transmitting F5MM

3-piece suit single-chip MCU infrared remote control module + receiving head HX1838 + NEC code infrared remote control

Infrared sensor receiver module

IR Infrared Receiver TL1838 VS1838B 38Khz