HR202 Humidity Resistance Sensor Module LM393 Chip for Arduino MCU

• Can detect the humidity of the surrounding environment
• Adjustable sensitivity adjust the digital potentiometer (shown in blue)
• Operating voltage 3.3V-5V
• Output in the form:
  a. voltage output
  b. digital switching outputs ( 0 and 1 )
• Fixed bolt hole for easy installation
• Small plates PCB size: 3cm * 1.6cm
• Power indicator (red) and digital switching output indicator (green )
• Using LM393 comparator chip, stable

Module interface specification ( 4 -wire )

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

Using instruction

• The hygristor module is most sensitive to the ambient humidity, generally used to detect the humidity of the surrounding environment.
• When the environmental humidity reach the threshold value is set, DO port output high
• when the humidity exceeds the threshold value is set when the external environment, the module D0 output is low
• Small plates digital outputs D0 can be directly connected with the microcontroller
• Microcontroller to detect high and low, and to detect changes in environmental humidity
• Board digital output DO OUR relay module can directly drive, which can form a wet control switch
• Small plates analog output AO OUR AD module connected through the AD converter, you can get a more accurate value of the environment humidity