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Product Code: WRL-189
Availability: In Stock


Description :

             A photoresistor or light dependent resistor (LDR ) is a component that is sensitive to light. When light falls upon it then the resistance changes. Values of the resistance of the LDR may change over many orders of magnitude the value of the resistance falling as the level of light increases.It is not uncommon for the values of resistance of an LDR or photoresistor to be several Megaohms in darkness and then to fall to a few hundred ohms in bright light. With such a wide variation in resistance, LDRs are easy to use and there are many LDR circuits available.

Working :

Light detecting resistor(LDR) module most sensitive to environmental light intensity is generally used to detect the ambient brightness and light intensity.
Module light conditions or light intensity reach the set threshold, Digital Ouput  port output high, when the external ambient light intensity exceeds a set threshold, the module Digital 0utput  low;
Digital output directly connected to the micro controller (MCU), and detect high or low TTL, thereby detecting ambient light intensity changes;
Digital output module can directly drive the relay module, which can be composed of a photoelectric switch;
Analog output module can be connected through the Analog to Digital converter, you can get a more accurate light intensity value

Specifications :

Operating Voltage: 3.3V to 5V DC
Operating Current: 15milli amps
LEDs indicating output and power
LM393 based design
Output Digital - 0V to 5V, Adjustable trigger level from preset
Output Analog - 0V to 5V based on light falling on the LDR
PCB Size: 3.2cm x 1.4cm

Pin configuration :

Input Voltage: DC 3.3V to 5V
Output: Analog and Digital
Sensitivity adjustable





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