Unit Light is a light intensity detection sensor. It integrates a photoresistor and a 10K adjustable resistor, capable of detecting light intensity and setting a light intensity threshold. The resistance of the photoresistor decreases as the intensity of incident light increases, thereby detecting changes in voltage. Through AD conversion, light intensity data is obtained. For more accurate light intensity detection, this Unit also uses the LM393 dual differential comparator to compare the differential voltage between the photoresistor and the varistor.
Question: What is the difference between a digital ambient light sensor and a light intensity detection sensor? (Can the brightness of a computer screen be measured?)
Illuminance: Refers to how much light I receive at a certain place, its unit of measurement is lux.
Brightness: The brightness perceived by the human eye. The unit of measurement is candela per square meter (cd/㎡).
Illuminance and brightness, one refers to how much light is received per unit area, and the other refers to how bright it appears per unit area.
Brightness is related to reflectivity; the reflectivity of the palm and the back of the hand is different, resulting in differences in brightness.
Therefore, the output of a digital ambient light sensor is the amount of light, which can be from sources such as incandescent lamps, fluorescent lamps, halogen lamps, white LEDs, and sunlight.
The output of a light intensity detection sensor is an analog value of light brightness, which can be divided into ultraviolet photoresistors, infrared photoresistors, and visible light photoresistors. Here, our sensor is a visible light intensity detection sensor.
