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 ...

It only applies to certain microcontrollers, but he provides example Arduino code ... measure a system’s voltage is to connect one of your MCU’s ADC pins to a voltage divider made from a ...

Little Bird Electronics posted an article about using an analog voltage reference with Arduino ... an external circuit, such as a voltage divider or an adjustable regulator, can give you a ...

The resistors in a potential divider ... voltage applied across the series combination of R1 and R2. This is the total voltage applied to the circuit. R1 and R2: These are the two resistors ...