Hello guys, welcome back. Today we are going to talk about how the “capacitive soil moisture sensor ” works with Arduino. Also, soil moisture can be easily monitored by this sensor. An LCD display is also used to monitor this value. Once this sensor is inserted into the soil we can get the values through this. It can be used primarily to make irrigation systems.
How the Capacitive Soil Moisture Sensor works.
Soil moisture was measured by this sensor by measuring the change in capacitance caused by changes in the electrolyte content of the soil. It also includes a 555 IC circuit to measure this capacity. This circuit produces a voltage proportional to the capacitance of the sensor. This voltage level is between 1.2v and 3v. Also, we can get that voltage through the analog pin. It is also known as soil moisture. This sensor requires a voltage of 3.2v to 5v to operate. However, the built-in voltage regulator completes the functionality and the sensor is made of corrosion-resistant material so it can be used for a long time.
We can see three pins in this sensor. Connect the cathode / GND terminal to the GND pin. A 5v voltage should be provided for the VCC terminal. Also, the AOUT PIN can obtain soil moisture as an analog value.
Well, now we will learn step by step how this sensor works with Arduino. Below are the necessary components.