This new Analog Ambient Light Sensor has a brand new design which is more convenient to use. This module helps you to detect the light density and report it back to the Arduino controller via an analog voltage signal. You can set the threshold of voltage level to trigger other units in your Arduino project.
We also use the enviromental PT550 light sensor which is more sensitive to light than the previous sensor used.
Note: The new version of analog sensor port pin mapping has been changed. Please check the tips for changing sensor cable pin mapping while using the I/O Expansion shield.