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 ...

The isolated analog input ... is a basic voltage-to-frequency converter. It uses an LM331 (IC1) V-F converter and a 4N25 (OK1) optocoupler (www.vishay.com) as the galvanic isolator. With the power ...

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 ...