List any two applications of photo diode and IRLED
Photodiode
1. In the cameras for sensing the light intensity.
2. In CD players.
3. In the fiber optic receiver.
4. As photo (light) detector.
5. In light intensity meters.
6. In the object counting system.
IRLED
1. In the remote control handsets.
2. In optocouplers.
3. In the shaft encoders
4. As a light source in optical fiber system
5. In the burglar alarm system.