SunFounder 3in1 Kit
• Operating voltage: 3.3V-5V
• Digital output: 0 (white) and 1 (black)
• Uses wide voltage LM393 comparator.
• Size: 42mmx10mm
Example
• 3.4 Detect the Line (Basic Project)
• 4. Follow the line (Car Project)
1.26 Soil Moisture Module
• GND: Ground
• VCC: Power supply, 3.3v~5V
• AOUT: Outputs the soil moisture value, the wetter the soil, the smaller its value.
This capacitive soil moisture sensor is different from most of the resistive sensors on the market, using the principle
of capacitive induction to detect soil moisture. It avoids the problem that resistive sensors are highly susceptible to
corrosion and greatly extends its working life.
It is made of corrosion-resistant materials and has an excellent service life. Insert it into the soil around plants and
monitor real-time soil moisture data. The module includes an on-board voltage regulator that allows it to operate over
a voltage range of 3.3 ~ 5.5 V. It is ideal for low-voltage microcontrollers with 3.3 V and 5 V supplies.
The hardware schematic of the capacitive soil moisture sensor is shown below.
1.26. Soil Moisture Module 47
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