Arduino can only deliver 5-10mA per pin - check the specification, - http://arduino.cc/en/Main/arduinoBoardUno -
or try it with a separate power supply for the peripherals...(GND's connected)
Arduino can only deliver 5-10mA per pin - check the specification, - http://arduino.cc/en/Main/arduinoBoardUno -
or try it with a separate power supply for the peripherals...(GND's connected)