0-10V Voltage Monitor

Rajkumar Sharma      http://www.rajkumarsharma.com  
Project tested


This project is a 0-10V Voltage Monitor.


0-10V Volt monitor project has been designed around LM3914 IC, It is an easy and less expensive project which instantly visualizes voltage level. The project is based on the popular LM3194 IC from Texas instruments. Handy 0-10V DC Voltmeter can be used as a voltage tester.

The LM3914 senses the voltage level at the input pin and drives the 10 light emitting diodes based on the voltage detected on input connector. Circuit works on 12V DC. J1 Jumper is used to select the DOT mode or bar graph mode.


  • Input: 12 VDC @ 100 mA
  • Output: 10 LED’s
  • 2 Types of display – Bar and Dot selectable by a jumper
  • Very low current consumption, typical 100mA
  • Header pins for connection of power and voltage in
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 31 mm x 74 mm


  • CN1 connections: VCC &GND: 0-10V variable input voltage supply
  • CN2 connections: VCC &GND – 12VDC power supply
  • J1 (Jumper): Open: Dot Mode & Close: Bar Mode





Front Panel



5 Response on “0-10V Voltage Monitor

    1. This project works with 12Vdc power source. So you need a 24Vac to 12Vdc power supply, which can be done using a transformer, a bridge rectifier, a LM7812 regulator and some filter capacitors.

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