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  • Light Sensors

    The light sensor is a passive device that converts the light energy into an electrical signal output. Light sensors are more commonly known as Photoelectric Devices or Photo Sensors because they convert light energy (photons) into electronic signal (electrons). Phototransistors, photoresistors, and photodiodes are some of the more common type of light intensity sensors.


    Photoelectric sensors use a beam of light to detect the presence or absence of an object. It emits a light beam (visible or infrared) from its light-emitting element. A reflective-type photoelectric sensor is used to detect the light beam reflected from the target. A beam of light is emitted from the light emitting element and is received by the light receiving element. Both the light emitting and light receiving elements are contained in a single housing. The sensor receives the light reflected from the target.


    A phototransistor, on the other hand, uses the level of light it detects to determine how much current can pass through the circuit. So, if the sensor is in a dark room, it only lets a small amount of current to flow. If it detects a bright light, it lets a larger amount of current flow. A photoresistor is made of cadmium sulphide whose resistance is maximum when the sensor is in dark. When the photoresistor is exposed to light, its resistance drops in proportion to the intensity of light. When interfaced with a circuit and balanced with potentiometer, the change in light intensity will show up as change in voltage. These sensors are simple, reliable, and cheap, used widely for measuring light intensity.


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      Manufacturer Part No Newark Part No. Manufacturer / Description
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    AMS302
    AMS302 - Ambient Light Sensor, High Sensitivity,  Through Hole, 1.5 Vdc to 6 Vdc

    11N1073

    Ambient Light Sensor, High Sensitivity, Through Hole, 1.5 Vdc to 6 Vdc

    PANASONIC

    LIGHT SENSOR; Sensor Output:Current; Wavelength of Peak Sensitivity:580nm; Supply Voltage Min:1.5V; Supply Voltage Max:6V; Ambient Light Sensor Case Style:Through Hole; No. of Pins:2Pins; Operating Temperature Min:-30°C RoHS Compliant: Yes

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    KPS-3227SP1C
    KPS-3227SP1C - Ambient Light Sensor, KPS Series, Phototransistor, 60 Vceo, 4 Veco

    27X9137

    Ambient Light Sensor, KPS Series, Phototransistor, 60 Vceo, 4 Veco

    KINGBRIGHT

    OPTICAL SENSOR, PHOTOTRANSISTOR, NPN; Sensor Output:Voltage; Wavelength of Peak Sensitivity:580nm; Supply Voltage Min:-; Supply Voltage Max:-; Ambient Light Sensor Case Style:SMD; No. of Pins:4Pins; Operating Temperature Min:-40°C RoHS Compliant: Yes

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    MAXREFDES23DB#
    MAXREFDES23DB# - REF DESIGN BOARD, IO LINK LIGHT SENSOR

    01AC2004

    REF DESIGN BOARD, IO LINK LIGHT SENSOR

    MAXIM INTEGRATED / ANALOG DEVICES

    REF DESIGN BOARD, IO LINK LIGHT SENSOR; Silicon Manufacturer:Maxim Integrated Products; Silicon Core Number:-; Application Sub Type:Light Sensor; Core Architecture:-; Core Sub-Architecture:-; Silicon Family Name:-; Kit RoHS Compliant: Yes

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    ISL76671AROZ-T7A
    ISL76671AROZ-T7A - AMBIENT LIGHT SENSOR, AEC-Q100, ODFN-6

    82Y6722

    AMBIENT LIGHT SENSOR, AEC-Q100, ODFN-6

    RENESAS

    AMBIENT LIGHT SENSOR, AEC-Q100, ODFN-6; Sensor Output:Voltage; Wavelength of Peak Sensitivity:550nm; Supply Voltage Min:1.8V; Supply Voltage Max:3.3V; Ambient Light Sensor Case Style:ODFN; No. of Pins:6Pins; Operating Temperature RoHS Compliant: Yes

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