If make RC model project, we will use the mini motor. So how to choose the correct mini motor is very important.
The three kinds mini motors are often used for the RC model: DC Motor, Stepper Motor, and Servo Motor.
DC motor: It's used for drive the the robots movements. If connect power, the motor will continue working. If change the "+/-", the motor rotator direction will be changed. The DC motor price is low, very suitable for the most application.
Mini DC Motor Mini DC Gear Motor
Stepper Motor: It's a kind of DC motor, that can divide a full rotation into a large number of steps. The motor's position can be controlled precisely without any feedback mechanism (an open-loop controller), as long as the motor is carefully sized to the application.