Proving Science

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I made a dc voltmeter which displays four different reading simultaneously on 16*2 LCD screen via Arduino nano and voltage divider circuit.The monitoring display consist of 4 different parameters i.e V1,V2,V3,V4. Each parameter can measure up to 12 volts.

In this vedio I connected solar panel,5 volt battery and two*9 volts battery.

The code and schemeati diagram is given here