Hey, I'm new to the arduino and want to know if my setup is possible before buying everything. I want to connect 3 servos, 1-3 LEDs and one display. All of the components should be controlled separtly. Can i connect all of these without an extra shield? Do I need an extra power supply or is an 9v battery connected directly to the arduino uno r3 enough? Also it would be nice if someone could recommend a small display which is easy to use.