Setup guide here
The Teknikio Light Sensorboard is the easiest way to activate your projects with light level. It runs off our Batteryboard and has two modes: simply connect the sensor in your circuit to sense "light" or dark". Easy to use with textile, paper, and other materials.In "light sense" mode the sensor will trigger an output to turn on when it senses light, and turn off when it sense dark
In the "dark sense" mode sensor will trigger an output to turn on when it senses dark and turn off when it senses light.
1" diameter circular shape with light rays design. Light and dark threshold values set to work as digital switch.