ITEM NAME:30X Photoresistor Gl5516 Ldr Cds 5Mm Light Dependent Resistor Sensor For Ardu JR Description:.Light-dependent resistors or photoresistors are a staple of electronics. If you need a way to sense the level of ambient light then there is no easier way to do it. As the light on the sensor increases then the resistance across the two leads decreases.
