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Produino LM393 Soil Moisture Sensor/Soil Detection Module for Arduino
This is a simple water sensor can be used to detect soil moisture when the soil moisture deficit module plant waterer device£¬ so that the plants in your garden without people to manage; Adjustable sensitivity adjust the digital potentiometer (shown in blue) Operating Voltage 3.3V-5V; Module Dual Output mode£¬ a simple digital output£¬ analog output more accurate; with fixed bolt hole for easy installation; small PCB board size: 3cm * 1.6cm; power indicator (red) and the digital switch output indicator (green); using LM393 comparator chip£¬ stable; Small plate interface specification (4-wire): VCC external 3.3V-5V; GND External GND ;DO small board digital output interfaces (0 and 1) ;AO small board analog output interface; Soil moisture module is most sensitive to the ambient humidity is generally used to detect the moisture content of the soil; Module in the soil humidity less than a set threshold value when the DO port output high£¬ when the when soil humidity exceeds the threshold value is set£¬ the module D0 output low; Small plates digital outputs D0 can be directly connected with the microcontroller£¬ microcontroller to detect high and low£¬ and thus to detect soil moisture; Small plates digital output DO shop relay module can directly drive the buzzer module£¬ and which can form a soil moisture alarm equipment; Small plates analog output AO and AD module connected through the AD converter£¬ you can get more accurate values of soil moisture