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.

Microcontroller: Arduino Nano. IR LEDs: 3× TSAL6100 in series. Amplification: LM318 configured as a non-inverting op-amp. Control: 2N2222 BJT to switch LEDs based on digital input. Design Highlights: ...

If you’ve ever needed a short-range remote control for a project, [firestorm] is here to help you out. He put up a great tutorial on using an IR remote to do just about anything with everyone… ...

Configure the pinout (4) corresponding to the IR receiver. Set the pin number corresponding to the IRreceiver.ino file to the same pin number you connect to the arduino board. With the remote control ...