Design of Digital Voltmeter for AC Voltage Measurement Using PIC Microcontroller

This article describes the design of a digital voltmeter for AC voltage measurement using PIC microcontroller. This design uses the PIC microcontroller, rectifier, voltage divider and seven segment displays to complete the desired measurement. We are using our microcontroller programming skills as well as our circuit designing expertise for the required design. This meter is calibrated for the measurement of upto 500 volts AC. Here we are using PIC microcontroller because this is having an internal ADC, however any other microcontroller can be used with or without internal ADC. But separate ADC is required if microcontroller used is without internal ADC.