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 standard 9V battery pack, as usual. As you may well know, ...

Canadian electronics geek and nascent YouTuber [Technoyaki] wanted to measure 20 volt signals on his Arduino. One might typically use a voltage divider to knock them down to the 5 volt range of ...

Little Bird Electronics posted an article about using an analog voltage reference with Arduino. This is a tool ... will be spread across your signal’s range, rather than just the lower half ...

Then, an Arduino board might ... A1, A2, and A3 (also analog input pins) now have a special functionality as OPAMP pins, capable of outputting the same voltage or increasing the voltage connected ...