Hi All
I would like to share how I have managed to power my Raspberry and my Arduino with a single adapter this would be great for my future All in One case (stil work on progress)
Any 12v adapter that fits a Arduino Mega wille be fine, on the internet they recommend to use a 9v adapter to get less heat from the voltage regulator but Arduino claims they can handle 9 - 12v adapters
in this case i use a 12v 1,5A adapter.
Needed parts from Alixpress
DC 12V to 5V Step down converter
Any plug with the size 5.5mm 2.1mm would work feel free to combine any female adapter you like
Combine all red wires and combine all black wires and solder red with red and black with black
Red +
Black -
in my situation the shorter leg from my female plug was my positive connection
I soldered the red cables to the shorter leg and the black wires on longer leg.
make sure before soldering that you know wich end you need.
After soldering I powered up my PI and all seems to works fine and i havent ran into any issues yet.
See below some images where you can see my test setup.
If you have an questions feel free to leave a comment
RFlink
Raspberry pi3
Arduino Mega
Power supply