Reviews: IR LED & Photo Diode Pair 5MM : rhydoLABZ INDIA
IR Receiver Diode
Applications of infra-red light emitting diode (IR LED) - Polytechnic Hub
uxcell 10pcs 5mm 940nm Infrared Emitter Diode DC 1.35V LED IR Emitter Light Emitting Diodes Clear Blue Round Head TSAL6200: Amazon.com: Industrial & Scientific