4-20mA Archives - Electronics-Lab

4-20mA / ±10V Analog Input Module for PLC

https://www.electronics-lab.com/4-20ma-%c2%b110v-analog-input-module-plc/

This is an analog input module that helps to digitalize temperature, current (4-20mA) and voltage (±10V) for PLC and Microcontrollers input. This analog module can be used for Programmable Logic Control (PLC), Programmable Automation Control (PAC) and Discrete Control System (DCS). The module has three input terminals. This PLC input accepts inputs of ±10 V […]

4-20 mA current output for Arduino Uno

https://www.electronics-lab.com/4-20-ma-current-output-arduino-uno/

Giovanni Carrera writes: The purpose of this project is to provide a 4-20 mA output from a PWM signal generated by a microcontroller ATmega328 and numerous other chips, such as the PIC. One of the more interesting applications of this circuit would be to replace or to realize a smart sensor with Arduino.” 4-20 mA […]

An isolated analog input for Arduino

https://www.electronics-lab.com/isolated-analog-input-arduino/

Giovanni Carrera designed a circuit that accepts input voltage from about 20mV to 5V or a current of 4 to 20 mA and converts it to a isolated frequency signal. A voltage to frequency converter can realize an opto-isolated analog input for Arduino or other microcontroller systems. This circuit is particularly suitable for industrial control […]