We are now going to build and add a pan and tilt servo mechanism to our robot. This will be like a head for our robot to mount sensors on it. A pan and tilt mechanism allows a sensor (or anything else) to be moved through two axes under servo motor control.
Pan is to turn left or right. Tilt is to tilt up or down. The following photo shows a pan and tilt mechanism:
A pan and tilt mechanism from a common kit
If you can, get a kit that looks like the previous photo, if not, you will have to look at the vendors details for instructions to build it—ensure it is the type that uses two servo motors. We will build the kit, mount it onto our robot, and plug it into the controller.
Our robot block diagram will look like the following:
Block diagram of the robot with servo motors added
