Hi all, Something strange seems to be happening with my power supply. When powering my arduino trough USB, the 5V out pin gives only 4.25V. Is this bad? (nothing is connected to the arduino except for my multimeter)
Then when i switch the usb supply for a 12V 1A center positive power supply, the 5V out pin stays at 4.5V for a couple seconds and then drops constantly while some component on the arduino board (next to the usb port) starts overheating.
I did check the power supply, it gives 15V when in open circuit, but 12V when connected to the arduino.
I also tried to use a 9V regulator. This time the regulator overheats after a couple seconds although according to the datasheet it should be able to sustain voltages up to 30V.
Could it be due to the fact that this power supply is able to give out up to 1A?