10 pcs Soil Humidity Hygrometer Sensor Moisture Module LM393 Chip For Cars

Description

Note
Please kindly be noted that the color of dupont cable may be different from the picture. Thank you!
Description
1 This is a simple moisture sensor can be used to test the moisture of soil,
when the soil water shortage, module output a high level, and otherwise output a low level.
Use this sensor to make one automatic watering device.
2 sensitivity adjustable (shown in blue digital potentiometer control)
4 working voltage of 3.3 V - 5 V
5 module double output mode, digital output is simple, analog output more accurate.
6 has fixed bolt hole, convenient installation
7 small board PCB size: 3 cm * 1.6 cm
8 power indicator light (red) and digital switch output light (green)
9 use LM393 chip, work stable
Plate interface specifications (4 wire)
1 VCC external 3.3 V - 5 V
2 GND external GND
3 DO small plate digital output interface (0 and 1)
4 AO small plate analog output interface
Instructions
1 soil humidity module to the environmental humidity is the most sensitive, generally used to detect soil moisture.
2 module in soil moisture can not reach the setting threshold, DO mouth output high level, when soil moisture more than setting threshold, module D0 output low level;
Three small plate digital output D0 can be directly connected with the single chip microcomputer, through the single chip microcomputer to detect the high and low level, thus to detect soil moisture;
4 small plate digital output DO can directly drive the relay module, buzzer module, which can form a soil humidity alarm equipment;
5 small plate analog output AO and AD module can be linked together, through the AD conversion, can get soil moisture more accurate numerical.