Raspberry Pi Soil Moisture Sensor Security Circuit and Motion Detector Electronic Hobby Kit

Features: • 1. This is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module outputs a high level, and vice versa output low. Use this sensor produced an automatic plant waterer device, so that the plants in your garden without people to manage. • 2. Sensitivity adjustable the blue digital potentiometer adjustment (Figure) • 3. Operating voltage 3.3V-5V • 4. Module dual output mode, digital output, analog output more accurate. • 5. With fixed bolt hole for easy installation • 6. PCB size: 3cm * 1.6cm • 7. Power indicator (red) and digital switching output indicator (green) • 8. Comparator LM393 chip, stable Interface Description (4-wire) 1. VCC: .3 V-5V 2. GND: GND 3. DO: digital output interface (0 and 1) 4. AO: Analog Output Interface