Smart irrigation system and Digital Motor Starter
Yuvaraj Dattatraya Misal · INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT · 2025
These devices measure the moisture level in the soil, providing real-time data to ensure optimal irrigation practices. In this sensor we are using 2 probes to be dipped into the soil as per moisture we will get Analog Output variations from 0.60-12volts. Input Voltage 12 VDC Role: Measures moisture level in the soil. Function: Outputs an analog voltage based on soil wetness Working: Dry soil → low conductivity → low voltage output Wet soil → high conductivity → high voltage output This value is read by the Arduino’s analog input I. INTRODUCTION Soil moisture sensors play a vital role in modern precision agriculture by providing real-time data that helps optimize irrigation and conserve water resources. These devices measure the moisture level in the soil and provide corresponding analog voltage outputs. The sensor used in this study includes two metal probes that are inserted into the soil. Depending on the moisture content, the sensor outputs analog voltage values ranging from 0.60 to 12 volts. The sensor operates with a 12 VDC input voltage. The principle of operation is based on soil conductivity: dry soil exhibits low conductivity, resulting in a low voltage output, whereas wet soil has high conductivity, leading to a higher voltage output. This analog voltage is read and interpreted using an Arduino's analog input, enabling automated and precise irrigation control.