I am trying to make a laser scanner consisting of a webcam and a line laser scanner. I have tried to use a manual scanning (by hand) and has worked, but would now like to consider automating the laser rotation (upwards and downwards) as a higher accuracy entails a slow and smooth rotation.
I came across arduino a few weeks back and realised it could possibly help to make this a reality. From my limited readings so far, I have obtained an Arduino Uno and a motor shield that seems to be the essentials for my purpose.
I have a few queries that hopefully someone can help:
Do I need a stepper motor for slow rotations, instead of a normal brushed motor?
Do I need to connect the Arduino to computer to make it run? Can I run it off battery, if so, does it have an 'ON' button?
How long will a standard 9V battery last?
For the code, I thought of using the simple one here: Arduino Motor Shield Tutorial. Would it be able to allow me to control the amount of rotation, speed and the ability to reverse its rotation?