The project illustrated here allows you to create a voltmeter / ammeter to be used perhaps for a power supply, based on Arduino in a stand alone version and which uses an ACS714 sensor for measuring current.
For more information see https://www.adrirobot.it/scheda-voltmetro-amperometro-con-arduino/
In this project, we are going to build a **Digital Voltmeter without using any microcontroller**. Here we are using a very popular IC for **voltage measurement namely ICL7107/CS710**7. ICL7107 is a 3.5 digit analog to digital converter (ADC) which consumes very low power. The IC has internal circuit for driving four seven segment display to display the measured voltage. It also has a clock circuit...