The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor.

IR emitter 1 Articles Bare Bones Arduino IR Receiver May 30, 2014 by Nick Conn 7 Comments ...

IR Receivers: IR receivers are designed to detect these pulsed infrared signals and convert them into electrical signals that can be interpreted by a microcontroller like the Arduino. Modulation: To ...

Programmed an Arduino to receive code through an IR receiver with a PS2 Remote and activate LEDS • Depending on the button that was pressed on the remote, it corresponded to the case programmed into ...