The Arduino Uno Rev3 ... There's also a slight input voltage difference between the Rev3 and the R4 WiFi. The Rev3 has a limit of 6 to 20 V only (although the recommended power supply rating ...

“Supplino is a Quick & Dirty PSU (Power Supply Unit) made with some widely available breakout boards, an Arduino Nano (or ... Regarding the power input, we prefer feeding it through an external ...