I started testing some of my UNO's and found one which would not power on using the power jack BUT would power on using the USB-B connection from a PI 3B+... Other UNO's powered on using the same power supply so I know that isn't the issue... Put a meter on the voltage regulator, when using just t…

Arduino UNO Power via USB-B but no power using power jack

steinerrw April 13, 2021, 3:13pm 2

Got a new voltage regulator and repaired/replaced and everything is good

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