Hi, For using my motors, it would be good to have a motor shield so I can easilly give the motors a supply from a diffirent source (that's true, or not?). But if you put the motor shield on the Uno R3, you have to use the pins on your motor shield. But my question is: if I put an adaptor of 10 V on my motor shield to juice my motors, will my pins, and so my sensors, circuit... also be on 10 V or will it just be the usual 5 V? Thanks! Bram
That is seperated. The 5V is always 5V, and never connected to the power supply for the motors.
But there are so many motor drivers/shields. Which one did you have in mind ?
That is the (old) Adafruit motor shield. Its main use is for 12V toy motors, so your 10V motors should be no problem. http://www.adafruit.com/products/81 There is a tutorial and libraries. That shield is simple, you can use it also without library: http://playground.arduino.cc/Main/AdafruitMotorShield
The DC plug of the Arduino Uno is used to power the motors (with jumper installed). If you want to power the Arduino board with a different power source, remove the jumper and power the motors with the power connectors on the motor shield. The 5V for the logic is always from the Arduino Uno.