On this slide the purpose of the motors in each application, the recommended driver products, and the motor type can be seen. Security cameras need motors for panning and tilting as well as for focusing and zooming the lens. If higher torque is required for panning and tilting, a 24 V motor may be required. For the toy application, one motor is used to steer left and right while another is used to move the wheels forward and backward. In the video projector, lens driving is the main application, plus in mid to high-end models, motors typically control the zoom and focus. In some high end projectors, lens shift and iris control are also motor driven. Whether controlling gas flow or water, the most common housing equipment application is typically valve control.