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LDR stands for Light Dependent Resistors. They are components which have low resistance in light conditions, and high resistance in dark conditions.


They can be used in a voltage-divider circuit to create a voltage which varies with light levels. Arduinos and many other microcontrollers can then read this voltage and use this information about the light levels to interact with the world.

workshops/arduino_for_the_curious/ldrs.txt · Last modified: 2017-04-05 12:52 (external edit)