Problem 5V

I’m having problems with 5V input. When I call a servant or a radio control, arduino just shuts down, sometimes the lights flash. What can be this problem?

Thank’s !

Sorry my english.

You will need to provide a lot more information and you may also need to spend some more time on the English translation.

Have you considered some of the other language-specific forum sections?

A common problem with Arduinos is when people try to draw too much current from the 5v pin causing the Arduino to reset. Motors or servos should not be powered from the 5v pin. But this is a comment about 5v OUTPUT whereas your question said 5v INPUT.