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 and a reference voltage source. For detailed instructions to DIY this Voltmeter circuit and PCB design, [click here][1]. [1]: https://circuitdigest.com/electronic-circuits/simple-digital-voltmeter-circuit-diagram