Description:

• 1.can detect the humidity of the surrounding environment
• 2.adjustable sensitivity (shown in blue digital potentiometer adjustment)
• 3.Operating voltage 3.3V-5V
• 4.Analog output form
• a.voltage output
• b.digital switching outputs (0 and 1)
• 5.with fixed bolt hole for easy installation
• 6.small plates PCB size: 3cm*1.6cm
• 7.Power LED (red) and the digital switch output indicator
• 8.using LM393 comparator chip, stable

Module interface specification (4-wire):

• 1.VCC external 3.3V-5V
• 2.GND External GND
• 3.DO small plate switch digital output interfaces (0 and 1)
• 4.AO analog output interfaces small plates

Module for use:

• 1.humidity resistance module most sensitive to environmental humidity is generally used to detect ambient humidity.
• 2.modules at ambient humidity reach the set threshold, DO port output high, when the external ambient humidity exceeds the set threshold, the module D0 output low;
• 3.digital outputs D0 small plates can be directly connected with the microcontroller through the microcontroller to detect high and low, thereby detecting the humidity changes;
• 4.small plates digital output DO OUR relay module can directly drive, which can be composed of a wet control switch;
• 5.small plates analog output AO can shop AD module connected through the AD converter, you can get more accurate humidity values;

Modules Test Description:

• By using our 51 development board and humidity resistance module test
• Wiring:
• Module development board connected to VCC VCC
• Module development board GND GND with
• Connect the VCC and GND, module power indicator lights
• Place the module on the desktop, adjust the blue board potentiometer until the on-board switch indicator light, and then a little pullback and let light switch off and think of ways to make the environment humidity increases, the module switch indicator will light . If the ambient humidity is low, the switch indicator will back off state. This phenomenon shows that the ambient humidity can trigger module, so that the switch indicator lights.