LM393 Soil Moisture Sensor Module Overview
This soil moisture sensor module utilises the LM393 comparator chip to provide a stable and accurate measurement of soil moisture levels. It is perfect for use in automated watering systems, robotics, and other applications where soil moisture monitoring is crucial.
Key Features
- Adjustable sensitivity via a digital potentiometer
- Operating voltage: 3.3V-5V
- Dual output mode: digital output for simple threshold detection and analog output for more precise measurements
- Fixed bolt hole for easy installation
- Compact PCB size: 3cm x 1.6cm
- Power indicator (red) and digital switching output indicator (green)
Technical Specifications
| Interface | Description |
|---|---|
| VCC | External power supply (3.3V-5V) |
| GND | External ground connection |
| DO | Digital output interface (0 and 1) |
| AO | Analog output interface |
Usage Instructions
The module is most sensitive to soil moisture and is typically used to detect soil moisture levels. When the soil moisture reaches the set threshold, the DO port outputs high; otherwise, it outputs low. The digital output can be directly connected to a microcontroller to detect soil moisture levels. The analog output can be connected to an AD converter for more accurate measurements.
