Software Voltmeter With History

This four channel Arduino software voltmeter with history was made by using an Arduino Uno and an application written in the Processing language that runs on a computer.




The Arduino reads analog values on four analog input pins connected through voltage dividers and then calculates the voltage. The Processing application displays the voltage reading and the voltage history is displayed on a graph for each channel.

This image shows the software voltmeter application:

Voltmeter Application Software

Voltmeter Application Software

Click the above link for the circuit diagram, Processing source code and Arduino source code for this project.

One thought on “Software Voltmeter With History

  1. I have running a arduino nano ( USB ) with your code.
    I see in the serial box from Arduino IDE the voltages.
    When i run the processing code i got only a blackbox, no data.
    I have test several serial ports but only at , ttyUSB0, i got the (black) box.
    code:
    ser_port = new Serial(this, Serial.list()[0], 9600);

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