Plug in the Grove Light Sensor module to the Analog Pin marked A3 on your Grove Base Shield. Attach the Shield to your Arduino UNO R3 / R4 and connect it to your computer. How to program the Arduino to detect light by reading the digital signal. This module integrates a photo-resistor to detect the intensity of light and the resistance of photo-resistor decreases when the intensity of light increases. Here we will discuss the Introduction to LDR sensor module or Photo-resistor sensor, Pin Diagram, Module Hardware Overview, Sensor module Circuit Diagram, Working Principle, its Specifications. This tutorial is a comprehensive, practical guide to the LM393 Light Detection Sensor Module (Leobot Product #222). You will learn. The KY-018 is a photoresistor module — also known as an LDR (light-dependent resistor), photosensitive resistor, or light sensor module — that measures ambient light intensity. Also sold under the part number HW-486, it is a common component in 37-in-1 and 45-in-1 Arduino sensor starter kits.
[PDF Version]