DC motor is an electrical device that is used to control the speed of any device in which it is installed. It is used to convert the electrical energy into mechanical energy. The DC motor can be found in the devices ranging from small to big. Huge motors will be used in industries whereas the small motors can be found in toys or some other play items of the children. What if there is an application to control the DC motor speed through the use of the android mobile phone? Yes it is possible through the use of the DC motor speed controller application.