Light Dependent Resistor
Gintautas Stonys
Target Group
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.


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.


*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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