hello
Is it possible the put an external Powersupply with 15V to the UNO Board.
I have an PC supply witch has 15V and 4A.
The reason is that i want to use this supply parallel for steering an lamp / Motor. and for this i need 2A.
unfortunately is the UNO just able to support 1,5A
thx
The Arduino can support up to 20V max input voltage, so you should be fine. However know that it will be extremely inefficient and you will be wasting a low of power as heat and your board will likely heat up quick. The recommended max is 12V. Honestly I would just use a 9V battery for arduino and than larger battery for motor.