Digital Voltmeter

Measure DC voltage with Arduino using an analog pin and a voltage divider.

Important Concept

Arduino analog pins must not receive more than 5V. To measure higher voltages, use a voltage divider so the analog pin stays safe.

ArduinoAnalog InputVoltage DividerBeginner

Build Steps

  1. Create a resistor voltage divider.
  2. Read the analog value on A0.
  3. Convert the reading into voltage.
  4. Compare with a multimeter for calibration.