Problem with helicopter motor

Other Hardware Motors, Mechanics, Power and CNC
5

I tired the following code just to fully turn on and off the motor (powered from the same power supply) and it works fine.

I dont know why when i feed the mosfet with pwm signal it will cause the mcu to reset...

void setup() 
{
  pinMode (11,OUTPUT);

}

void loop() 
{
  digitalWrite (11, HIGH);
  delay(2000);
  digitalWrite (11, LOW);
  delay(2000);
}