Here is a useful circuit for Arduino lovers and experimenters. It is a simple digital voltmeter, which can safely measure input dc voltages in 0 to 30V range. The Arduino board can be powered from a ...

The circuit also holds a bi-color indicator (LED1 ... LCD into a single-channel digital DC voltmeter. The Atmega328 at the kernel of the Arduino has six analog inputs (10-bit ADC), but two of them are ...

YouTube DIYer Educ8s builds a cheap voltmeter for less than $10 using an Arduino and a voltage sensor. A multimeter that measures voltage is one of those devices every electronics tinkerer should ...