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Optical Sensors Application Note Ambient Light Sensors – Circuit and Window Design Ambient light sensors are used to detect light or brightness in a manner similar to the human eye. They are most commonly found in industrial lighting, consumer electronics, and automotive systems, where they allow settings to be adjusted automatically in response to changing ambient light conditions. By turning on, turning off, or adjusting features, ambient light sensors can conserve battery power and provide extra safety while eliminating the need for manual adjustments. Vishay offers a wide variety of ambient light sensors in leaded and surface mount packages, with photodiode or phototransistor outputs, narrow to broad viewing angles or angles of half sensitivity, and automotive qualified to the AEC-Q101 standard
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