Maybe the regulator varies on different Unos if the spec for the Uno says 50mA ? Still most regulators should be up to the task - so what is the evidence that "it seems that the 3.3V output is not working"? Measured with a multimeter?
Maybe the regulator varies on different Unos if the spec for the Uno says 50mA ? Still most regulators should be up to the task - so what is the evidence that "it seems that the 3.3V output is not working"? Measured with a multimeter?