WPB4701S5CR-001

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WPB4701S5CR-001 is a series of high-frequency ambient light sensors produced by EVERLIGHT Electronics Co., Ltd. The sensors type is based on a phototransistor. WPB4701S5CR-001 has an operating ambient light range of 4.5mW/cm2 to 5mW/cm2. It is commonly used in applications including ambient light control, safety systems, and outdoor displays.

Application Fields

The most common applications for the WPB4701S5CR-001 include environmental light control systems. These systems typically require the sensor to be able to measure ambient light levels over a wide range from darkness to bright sun. The WPB4701S5CR-001\'s range of 4.5mW/cm2 to 5mW/cm2 is ideal for this kind of application. In addition, the WPB4701S5CR-001 can be used in safety systems such as fire alarms, and in outdoor display systems where the lighting conditions can change frequently.

Working Principle

The working principle of the WPB4701S5CR-001 is based on the phototransistor. The WPB4701S5CR-001 sensor consists of a phototransistor, a photodiode, and a light filter. The phototransistor is sensitive to all visible light, so it can measure the ambient light level. The photodiode is surrounded by a light filter that blocks all but certain frequencies of light, so that the WPB4701S5CR-001 will not be affected by non-natural light sources such as incandescent, LED, and fluorescent lights. The photodiode amplifies the light signal and sends it to the phototransistor.

The phototransistor converts the light signal into an electric current, which is then used to generate a voltage signal. This signal is used to represent the ambient light level. Depending on the application, different signal conditioning techniques can be used to convert the signal into the desired output, such as an analog output for a light meter, or a digital output for an LED display. The digital output also allows for improved resolution and accuracy. The WPB4701S5CR-001 can also be connected to a microcontroller to provide digital control of the output.

Conclusion

The WPB4701S5CR-001 is a series of high-frequency ambient light sensors produced by EVERLIGHT Electronics Co., Ltd. Its operating ambient light range of 4.5mW/cm2 to 5mW/cm2 makes it ideal for applications such as environmental light control, safety systems, and outdoor displays. The working principle of the WPB4701S5CR-001 is based on the phototransistor, and the signal is either conditioned into an analog or digital output depending on the application.

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