LDR Sensor Module

Description

This LM393 Photosensitive Light-Dependent Control Sensor LDR Module is using a high-quality LM393 voltage comparator. Easy to install using the sensitive type photosensitive resistance sensor the comparator output signal gives a clean and good waveform.

Driving ability is 15mA with the adjustable potentiometer, it can adjust the brightness of the light. The working voltage is 3. 3V to 5v. Where output is a digital switch output. Since this module is sensitive to the light, usually used for detecting the ambient brightness and light intensity.

You can use this board digital output DO port drive relay module directly(our store on sale these relay modules), and can also use it as a photoelectric switch. The analog output ao connects with the ad module and it can get more precise light intensity value through the ad-converter.

Features:-

• Can detect ambient brightness and light intensity
• Adjustable sensitivity (via blue digital potentiometer adjustment)
• Operating voltage 3.3V-5V
• Output Type

Analog voltage output -A0
Digital switching outputs (0 and 1) -D0

• With fixed bolt hole for easy installation
• Small board PCB size: 3cm * 1.6cm
• Power indicator (red) and the digital switch output indicator (green)
• Using LM393 comparator chip, stable

Pin outs:-

• External 3.3V-5V VCC
• External GND GND
• DO digital output interface, a small plate (0 and 1)
• AO small board analog output interface

How to use:-

• Photosensitive resistor 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, DO port output high, when the external ambient light intensity exceeds a set threshold, the module D0 output low;
• Digital output D0 directly connected to the MCU, and detect high or low TTL, thereby detecting ambient light intensity changes;
• Digital output module DO  can directly drive the relay module, which can be composed of a photoelectric switch;
• Analog output module AO and AD modules can be connected through the AD converter, you can get a more accurate light intensity value