LDR 12mm Light Dependent Resistor

OVERVIEW:

This large 12mm (1/2″)  LDR (Light Dependent Resistor) is also called a photoresistor.  An LDR is a resistor whose resistance changes with the amount of light striking it.

As the strength of the light falling on the LDR increases, the resistance of the LDR gets lower.

It is typical to put the LDR in series with a resistor to create a voltage divider and feed that output to an analogue input on a uC.  The output will be a lower voltage when no light is striking the sensor and the voltage will increase as the light intensity increases.

These can be used in a variety of applications such as monitoring a pilot light, night light control or anywhere that you want to detect a basic threshold of light and take some action.

Features:

• Coated with epoxy
• Good reliability
• Small volume
• High sensitivity
• Fast response
• Good spectrum characteristic