Low-cost multi electrode resistivity meter based on microcontroller for electric resistivity tomography purpose

This study was conducted to make Multi Electrode Resistivity Meter with simple and low-cost circuit design. The instrument that has been made use switching mode boost converter for increasing the voltage with Arduino Nano as a source of PWM signal connected to the boost converter circuit, and cascode current mirror circuit is used for constant current source. The sensor on this resistivity meter using the voltage divider circuit for voltage sensor, and non-inverting OPAMP circuit for current sensor. Multi electrode circuit using relay module connected with IC74HC595 and controlled by Arduino MEGA 2560. This instrument is integrated with GUI that serves as controller and data display. There are several measurements for this instrument that is maximum resistance on each constant current generated from the circuit, repeatability and reproducibility measurement, sensor calibration measurement, and ERT measurement with three configuration i.e wenner configuration, wenner-schlumberger configuration, and dipole-dipole configuration on soil samples. (paper)