Automatic faucets are made with motion sensors that use infrared light. The light source and detector are arranged in a reflective setup. When it detects a hand or other object blocking the light path, it controls the faucet to open or close. It uses an infrared LED as a light source, and a photo IC or CMOS linear image sensor for the detector.
The L14096-0085GL is an infrared LED available in a surface mount type COB package with lens. Narrow directivity was achieved by adopting a lens.
The L12756 is an infrared LED encapsulated in a bullet-shaped package. It offers high output power and high-reliability.
Inexpensive, compact and thin linear image sensors. Hamamatsu offers different types with various numbers of channels.
These photo ICs are capable of light detection, with few malfunctions even in background light.
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