can i use a 9 volt battery to power on my Ardunio ?
i tried to power my Arduino from raspberry pi the Arduino powered up but it could not run a motor (it have a different external power source for the motor) so i want to power my Arduino from a 9 volt battery and connect it to the raspberry pi to make serial communication.
1-will my plane work ? 2-is it ok to power Arduino from the external port and the USB together ? 3-Can i use the same 9 volt battery to power up the Arduino and the motor together ?