Infrared light is undetectable to the human eye so it is perfect for wireless communication.
Infrared LED has polarity i.e.it has a positive and negative pin. The pin which is long is the positive pin (anode) and the pin which is short is the negative pin (cathode)
Infrared applied system.
- Transmission system
- Optoelectronic switch
- Infrared remote control equipment’s
- Smoke detector