AutoCad Arm Drawing

As I promised in my earlier posts, I have been hard at work in drawing an arm for the camera that will be attached to the final design on my vehicle.  I have been keeping in close contact with my mentor about various specifications regarding the movements and components of the arm.  After much deliberation I have concluded on the basic specifications that the arm must achieve:

• it must be able to have 180 degrees of rotation or more in respect to the base.  The camera must be able to take pictures on either side of the vehicle with as minimal movements as possible.
• it will have two joint points - one on the base and the other attached to the camera.  The base joint will allow the rotation of the arm in the x-y plane.  The camera joint will allow the camera to change its angle in the z plane.  
• adhere to the limitations regarding the rest of the project, especially the materials requirement.  We cannot use more than what has already been ordered for us and is coming in the mail

I am looking to have this drawing completed by the end of the week.