Unit Light is a light intensity detection sensor. It integrates a p oresistor and a 10K adjustable resistor, enabling it to detect light intensity and set a light intensity threshold. The resistance of the p oresistor decreases as the incident light intensity increases, thereby detecting the change in its voltage and obtaining light intensity data through AD conversion. To obtain more accurate light intensity detection data, the Unit also uses an LM393 dual differential comparator to compare the differential voltage between the p oresistor and the varistor. Product Feature: Differential voltage design Analog digital output Development platform: for Arduino, UIFlow 2x for LEGO-compatible holes Application: P oswitch Solar Garden Light Infrared Surveillance Camera Color: White Material: plastic Package Contents: 1 * Light Sensor 1 * HY2.0-4P Grove Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.