Resistance of the LDR falls as light intensity increases. Useful as a light sensor in projects. The on-board resistor makes it easier to wire to your project!
*This module is part of the KY series of sensors which means that the prints on the board might be mislabelled, do read our notes in the description to understand how to wire it properly. For more information about the problems with the KY series, click here!
Operating Voltage: 3.3V to 5V
Note: Pin 1 should be connected to Ground, Pin 2 to 5V and Pin 3 is the data output pin.
Hookup Guide: https://arduinomodules.info/ky-018-photoresistor-module/