Thanks to you both for replying and taking the time to answer these basic questions. It looks like all of my problems can be solved by getting a UBEC or some more batteries to power the servo as well. And maybe also to power the distance module since it's so close to drawing 16mA from the 5V. And I ...

Hey, I've got an idea for a project. It's basically a rip off from the letsbuildrobots starting robot. It will have an Ultrasonic Distance Measurer on top of a Servo and 2 Motors controlled by an L298N. The robot will move. Check distance every 2 seconds in 3 directions and move again to the path wh...