Table 1: Comparison between Multimeter and our work.

Category Multimeter Our work
AC Voltage measurement range Up to 1000 VAC 170-280 VAC (Adjustable)
Power source Battery Power voltage
Measuring contact Probe cable Electrical plug
Main visual indicator or display Pointer or numeric 12 LEDs
Microcontroller N/A Arduino Uno
Additional measurement capability Ampere, Ohm N/A