Hello
I'm totally new to this forum and this is my first topic. hoping I'm posting in a right way.
I recently bought a Arduino Mega 2560 and according to it's documents, a 9V power supply would be great for it. I just finished the programing and now I want to test it on external power but whenever I connect it to the 9V 2A power supply, the atmega 2560 become very hot that I can't touch it. The code also take a bit time to start.
I don't have this issue with usb power and everything is fine.
I just wanted to know is it a normal behavior or I did something wrong?
By the way, I want to run it on external power for more than 20 days. so heatting is important and I don't want to fry up my arduino.
Connecting to the barrel is fine. It should not heat up the microcontroller.
So you'll have to look for other causes.
First thing that I would do is test without anything connected to the board except for the power supply.
Second check that I would do is to check the output of the 5V regulator (on the 5V pin); that feeds the whole board with 5V and if faulty can provide 9V to the board.
sterretje:
Connecting to the barrel is fine. It should not heat up the microcontroller.
So you'll have to look for other causes.
First thing that I would do is test without anything connected to the board except for the power supply.
Second check that I would do is to check the output of the 5V regulator (on the 5V pin); that feeds the whole board with 5V and if faulty can provide 9V to the board.
I've tested it without anything connected to the board. the same issue again.
Unfortunately i don't have multimeter to measure the output of the 5V regulator.
Isn't there anything else that i can do?