Select The Right Motor For Your Project

DC Motor
This is the most common type of small battery operated motor that can be used for a variety of projects. The main advantage is their small size
and they do not require complicated control. It can be connected directly to the rated battery voltage for simple functions. Straight from the box, a typical DC motor spins in excess of 15,000 rpm (revolution per minute), which is way too
fast for most applications. To be useful, it must be geared down to the appropriate speed. Another reason for gearing down a DC Motor is to increase the tuning torque (turning power) which is required to do useful work.

Because of their small sizes and easy control, DC motors find many uses in modern appliances.
They can be found cooling power supplies and CPUs in PCs and operating CD ROM drives. Printers use a few of them in each unit to feed paper to the print head. As a result, they can be found easily in used equipment and modified to for use in a project. However, it is important to note that DC motors are not
very precise in their operations. Their speed can vary quite a bit even under the same operating condition. This is especially the case when they are under load.