LIGHT is a light intensity sensor unit with an adjustable photo-resistor。

A photo-resistor is a light-controlled variable resistor. The resistance of a photo-resistor decreases with increasing incident light intensity and vice versa. The sensor exhibits photoconductivity which make it possible to detect the light varies based on voltage and use an AD (Analog to digital converter) to convert the digital data.

We added some extra work to strengthen the circuit, a Dual Differential Comparators LM393, compares the differential voltage between the photo-resistor and the varistor. It could offer larger and accuracy range of light intensity.

Product Feature

Differential voltage design
Analog digital output
Development platform: Arduino, UIFlow
2x LEGO compatible holes

Include

1x LIGHT Unit
1x HY2.0-4P Cable

Application

Photoswitch
Solar Garden Light
Infrared Surveillance Camera