Light Detector Module

The LDR sensor module is a low-cost sensor capable of measuring and detecting light intensity. Also known as a photoresistor sensor, it features an onboard LDR (Light Dependent Resistor) for light detection. The module typically has four terminals, with a digital output (DO) pin and an analog output (AO) pin. The digital output goes high in the absence of light and low in its presence. The sensor’s sensitivity can be adjusted using an onboard potentiometer.