Thanks all.
I'd like one powersupply for the arduino, the raspberry pi and the servo and the motors.
The raspberry pi sends commands like to the arduino. The aruino will interperet these commands and turn the motors or turn the servo.
The raspberry pi needs exactly 5 volts. If i connect a powersupply of 5 volts, it should work.
But what if i then run the motors and the servo from the same powersupply?
Won't that give less power to the raspberry pi and making it crash? It is not an option to add more batteries and volts, because the Raspberry pi can only handle 5 volts.
As I said, i am a total noob in this area. But I can not find any usefull info on the web.(i just don't know what to google for.)
Regards,
Jombo