uxcell 5516 GL5516 Photoresist Kit, 0.2 inch (5 mm) Photo Sensitive Resistor, Free Box, 50 Pieces

Photoresistors are also called photo-dependent resistors (LDR), which are most commonly used to indicate whether or not light or measure the intensity of light In the dark, its resistance is very high, sometimes up to 1MΩ, but when the LDR sensor is exposed to light, the resistance will be dramatically reduced to several ohms depending on the intensity of the light The sensitivity of LDR varies depending on the wavelength of the light applied and is a non-linear device These are used by many tools, but may be discontinued by other devices such as photo diodes and photo transistors Please make sure the right type according to your needs

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