Digital Panel Meter – Voltmeter

  • Rajkumar Sharma
  • 55588
  • moderate
  • Tested


Digital Panel Meter performs digital processing on or conversion and display of voltages, currents, other analog signals, and pulse signals. This project is based on popular ICL 7107 IC, which is analog to digital converter and has been designed to drive 7 segment LED display. The ICL7107 is high performance, low power, 3, 1/3 digit A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. This DPM project may be used in a wide variety of configurations Full scale reading of +/- 199.9mV (200mV)


  • Supply 5V DC @ 80mA.
  • Range 0 to 199.9mV (200mV)
  • Low Current consumption
  • Low input leakage current because external reference
  • Single supply operation
  • On board Jumpers for range display
  • Auto Zero and auto polarity within IC
  • Supply Input CN2 5V DC
  • Test Voltage CN1 0-200mV
  • PR1 Preset for reading calibration.



Parts List





  • Rafael Ortega

    Excelente. Muy diactico. Para nosotros los hobbistas, tiene mucho valor. Estoy seguro que de construirlo, aprenderas mucho. Gracias

    5 years ago
  • fakhour

    thank you for showing us how to connect the power to the aboratoir 0 to 35v is very important please

    5 years ago
  • fakhour

    Thank you to show us a diagram how to connect the voltmeter to a power of aboratoir 0 to 35v is very important please

    5 years ago
  • Barshid Mondal


    5 years ago
  • Marthinus Vogel

    Being rather new in the electronics game, I would love to build this display to work with my self built 0 to 30 volt adjustable power supply.
    If I find it difficult I will order the kit if available.
    Hope I can find the 1.2v zener in a to92 package, but suppose a normal one will do.
    Thanks Electronics-Lab.

    5 years ago
    • admin

      Hi, 1.2V zener is a standard value and you may use another package also.

      4 years ago
  • Tauhiduzzaman

    I am a big fan of your site. Please upload another Digital Panel Meter that range will be 0 to 100 volt. i will be grateful to you.

    4 years ago
    • admin

      Thanks for your kind words. You can use a voltage divider on the input to scale your voltage on the 0-100mV range

      4 years ago
  • Ray Anthony Pizarro

    hi can I used this in VFD tubes?

    3 years ago
    • admin

      No, this IC is designed to be used with 7-segment LED displays.

      3 years ago

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