Photoresistor LDR Light Sensor Module (LDR) แบบ 4-Pin

Photoelectric module Sensor โมดูลใช้ในการตรวจจับความสว่างและความเข้มของแสง 

ใช้งานได้ทั้ง Analog output และ Digital Output  โดย Digital output จะให้ค่าเป็น High เมื่อมีแสงสว่างตกที่ตัวเซนเซอร์เกินค่าที่ตั้งไว้

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