Physics
Light Dependent Resistor
Author
Gintautas Stonys
Target Group
Student
Brief Description
An LDR is a component that has a (variable) resistance that changes with the light intensity that falls upon it. This allows them to be used in light sensing circuits.

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Applications of LDRs

There are many applications for Light Dependent Resistors. These include:

Lighting switch

The most obvious application for an LDR is to automatically turn on a light at a certain light level. An example of this could be a street light or a garden light.

Camera shutter control

LDRs can be used to control the shutter speed on a camera. The LDR would be used to measure the light intensity which then adjusts the camera shutter speed to the appropriate level.


Example of an experiment.

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*For full explanation, download the file down below.

Related files

Light-Dependent Resistor (LDR) 260 KB
Solution_Light-Dependent Resistor (LDR) 642 KB
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