Home Question Answer How does the Light Dependent Resistor (LDR) work? How does the Light Dependent Resistor (LDR) work? LDR works on the photo-conductivity principle, where its resistance changes based on the amount of light it receives. When exposed to light, the resistance decreases, and it increases in darkness. Related Questions How does an LDR work? What are the two sensors in the Wiz LDR Proximity Sensor? What is the purpose of LDR1 in the Wiz LDR Proximity Sensor? What is the purpose of LDR2 in the Wiz LDR Proximity Sensor? How does the Wiz LDR Proximity Sensor act as a “Color Detector”? How are LDRs used in light up toys? What is the benefit of using LDRs in automatic lights? How are LDRs utilized in night lights? Load More